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Posted to commits@teaclave.apache.org by hs...@apache.org on 2023/06/01 09:48:28 UTC
[incubator-teaclave-crates] branch main updated: Add rustls 0.19.1 and mio 0.8.6
This is an automated email from the ASF dual-hosted git repository.
hsun pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/incubator-teaclave-crates.git
The following commit(s) were added to refs/heads/main by this push:
new ede1f68 Add rustls 0.19.1 and mio 0.8.6
ede1f68 is described below
commit ede1f68d891798fe6cf995e33281f01d59be9320
Author: GeminiCarrie <sp...@163.com>
AuthorDate: Thu Jun 1 17:17:46 2023 +0800
Add rustls 0.19.1 and mio 0.8.6
---
README.md | 2 +
mio/.cirrus.yml | 27 +
mio/.github/CODEOWNERS | 2 +
mio/.github/workflows/ci.yml | 142 ++
mio/.gitignore | 4 +
mio/CHANGELOG.md | 620 +++++++++
mio/Cargo.toml | 99 ++
mio/LICENSE | 19 +
mio/Makefile | 43 +
mio/README.md | 179 +++
mio/examples/tcp_listenfd_server.rs | 209 +++
mio/examples/tcp_server.rs | 189 +++
mio/examples/udp_server.rs | 85 ++
mio/src/event/event.rs | 230 ++++
mio/src/event/events.rs | 230 ++++
mio/src/event/mod.rs | 10 +
mio/src/event/source.rs | 139 ++
mio/src/interest.rs | 193 +++
mio/src/io_source.rs | 334 +++++
mio/src/lib.rs | 266 ++++
mio/src/macros.rs | 70 +
mio/src/net/mod.rs | 39 +
mio/src/net/tcp/listener.rs | 248 ++++
mio/src/net/tcp/mod.rs | 5 +
mio/src/net/tcp/stream.rs | 427 ++++++
mio/src/net/udp.rs | 697 ++++++++++
mio/src/net/uds/datagram.rs | 236 ++++
mio/src/net/uds/listener.rs | 104 ++
mio/src/net/uds/mod.rs | 10 +
mio/src/net/uds/stream.rs | 245 ++++
mio/src/poll.rs | 714 ++++++++++
mio/src/sys/mod.rs | 86 ++
mio/src/sys/shell/mod.rs | 72 +
mio/src/sys/shell/selector.rs | 127 ++
mio/src/sys/shell/tcp.rs | 31 +
mio/src/sys/shell/udp.rs | 11 +
mio/src/sys/shell/uds.rs | 75 +
mio/src/sys/shell/waker.rs | 16 +
mio/src/sys/unix/mod.rs | 73 +
mio/src/sys/unix/net.rs | 178 +++
mio/src/sys/unix/pipe.rs | 577 ++++++++
mio/src/sys/unix/selector/epoll.rs | 290 ++++
mio/src/sys/unix/selector/kqueue.rs | 861 ++++++++++++
mio/src/sys/unix/selector/mod.rs | 49 +
mio/src/sys/unix/sourcefd.rs | 116 ++
mio/src/sys/unix/tcp.rs | 113 ++
mio/src/sys/unix/udp.rs | 31 +
mio/src/sys/unix/uds/datagram.rs | 56 +
mio/src/sys/unix/uds/listener.rs | 93 ++
mio/src/sys/unix/uds/mod.rs | 159 +++
mio/src/sys/unix/uds/socketaddr.rs | 130 ++
mio/src/sys/unix/uds/stream.rs | 34 +
mio/src/sys/unix/waker.rs | 187 +++
mio/src/sys/wasi/mod.rs | 370 +++++
mio/src/sys/windows/afd.rs | 255 ++++
mio/src/sys/windows/event.rs | 161 +++
mio/src/sys/windows/handle.rs | 30 +
mio/src/sys/windows/io_status_block.rs | 40 +
mio/src/sys/windows/iocp.rs | 273 ++++
mio/src/sys/windows/mod.rs | 152 +++
mio/src/sys/windows/named_pipe.rs | 993 ++++++++++++++
mio/src/sys/windows/net.rs | 111 ++
mio/src/sys/windows/overlapped.rs | 35 +
mio/src/sys/windows/selector.rs | 752 +++++++++++
mio/src/sys/windows/tcp.rs | 66 +
mio/src/sys/windows/udp.rs | 46 +
mio/src/sys/windows/waker.rs | 29 +
mio/src/token.rs | 138 ++
mio/src/waker.rs | 96 ++
mio/tests/aio.rs | 226 ++++
mio/tests/close_on_drop.rs | 131 ++
mio/tests/events.rs | 43 +
mio/tests/interest.rs | 51 +
mio/tests/poll.rs | 662 +++++++++
mio/tests/registering.rs | 246 ++++
mio/tests/regressions.rs | 127 ++
mio/tests/tcp.rs | 947 +++++++++++++
mio/tests/tcp_listener.rs | 285 ++++
mio/tests/tcp_stream.rs | 848 ++++++++++++
mio/tests/udp_socket.rs | 1133 ++++++++++++++++
mio/tests/unix_datagram.rs | 400 ++++++
mio/tests/unix_listener.rs | 202 +++
mio/tests/unix_pipe.rs | 217 +++
mio/tests/unix_stream.rs | 545 ++++++++
mio/tests/util/mod.rs | 375 +++++
mio/tests/waker.rs | 138 ++
mio/tests/win_named_pipe.rs | 350 +++++
{rustls => rustls-0.19.1}/.azure-pipelines.yml | 17 +-
rustls-0.19.1/.github/workflows/build.yml | 112 ++
{rustls => rustls-0.19.1}/.gitignore | 0
rustls-0.19.1/.rustfmt.toml | 1 +
{rustls => rustls-0.19.1}/.travis.yml | 21 +-
{rustls => rustls-0.19.1}/CONTRIBUTING.md | 0
{rustls => rustls-0.19.1}/Cargo.toml | 0
{rustls => rustls-0.19.1}/LICENSE | 0
{rustls => rustls-0.19.1}/LICENSE-APACHE | 0
{rustls => rustls-0.19.1}/LICENSE-ISC | 0
{rustls => rustls-0.19.1}/LICENSE-MIT | 0
{rustls => rustls-0.19.1}/OLDCHANGES.md | 0
{rustls => rustls-0.19.1}/README.md | 54 +-
rustls-0.19.1/SECURITY.md | 18 +
{rustls => rustls-0.19.1}/admin/bench-measure.mk | 0
{rustls => rustls-0.19.1}/admin/bench-range | 0
{rustls => rustls-0.19.1}/admin/build-lcov | 0
{rustls => rustls-0.19.1}/admin/capture-certdata | 0
{rustls => rustls-0.19.1}/admin/coverage | 31 +-
{rustls => rustls-0.19.1}/admin/coverage-rustc | 0
{rustls => rustls-0.19.1}/admin/format-bench | 0
rustls-0.19.1/admin/llvm-gcov | 2 +
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{rustls => rustls-0.19.1}/admin/pipelines/bogo.yml | 0
.../admin/pipelines/cargo-steps.yml | 0
.../admin/pipelines/coverage.yml | 7 +-
.../admin/pipelines/min-versions.yml | 0
.../admin/pipelines/rustup.yml | 0
rustls-0.19.1/admin/pipelines/ubuntu.yml | 3 +
{rustls => rustls-0.19.1}/admin/pull-readme | 0
{rustls => rustls-0.19.1}/admin/pull-usage | 0
.../admin/rustls-logo-web.png | Bin
rustls-0.19.1/audit/TLS-01-report.pdf | Bin 0 -> 192473 bytes
{rustls => rustls-0.19.1}/bogo/.gitignore | 1 +
{rustls => rustls-0.19.1}/bogo/check.py | 0
{rustls => rustls-0.19.1}/bogo/config.json | 216 ++-
rustls-0.19.1/bogo/fetch-and-build | 19 +
{rustls => rustls-0.19.1}/bogo/keys/cert.pem | 0
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.../bogo/keys/ecdsa_p384_key.pem | 0
{rustls => rustls-0.19.1}/bogo/keys/key.pem | 0
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.../bogo/keys/rsa_1024_key.pem | 0
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.../bogo/patches/testerrormap.diff | 0
rustls-0.19.1/bogo/patches/vendor.diff | 38 +
{rustls => rustls-0.19.1}/bogo/regen-certs | 0
{rustls => rustls-0.19.1}/bogo/runme | 0
{rustls => rustls-0.19.1}/fuzz/.gitignore | 0
{rustls => rustls-0.19.1}/fuzz/Cargo.toml | 5 +-
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.../fuzz/corpus/server/tls12-client.bin | Bin
.../fuzz/corpus/server/tls13-client.bin | Bin
{rustls => rustls-0.19.1}/fuzz/fuzzers/client.rs | 0
{rustls => rustls-0.19.1}/fuzz/fuzzers/deframer.rs | 0
{rustls => rustls-0.19.1}/fuzz/fuzzers/fragment.rs | 0
{rustls => rustls-0.19.1}/fuzz/fuzzers/hsjoiner.rs | 0
{rustls => rustls-0.19.1}/fuzz/fuzzers/message.rs | 0
{rustls => rustls-0.19.1}/fuzz/fuzzers/persist.rs | 0
{rustls => rustls-0.19.1}/fuzz/fuzzers/server.rs | 4 +-
{rustls => rustls-0.19.1}/rustls-mio/Cargo.toml | 20 +-
.../rustls-mio/examples/tlsclient.rs | 247 ++--
.../rustls-mio/examples/tlsserver.rs | 221 +--
.../rustls-mio/tests/badssl.rs | 2 +-
{rustls => rustls-0.19.1}/rustls-mio/tests/bugs.rs | 3 +-
.../rustls-mio/tests/client_suites.rs | 12 +-
.../rustls-mio/tests/common/mod.rs | 141 +-
.../rustls-mio/tests/curves.rs | 8 +-
.../rustls-mio/tests/errors.rs | 8 +-
.../rustls-mio/tests/features.rs | 227 +++-
.../rustls-mio/tests/server_suites.rs | 24 +-
.../rustls-mio/tests/topsites.rs | 1 -
{rustls => rustls-0.19.1}/rustls/Cargo.toml | 9 +-
rustls-0.19.1/rustls/examples/README.md | 1 +
rustls-0.19.1/rustls/examples/internal/bench.rs | 639 +++++++++
.../rustls/examples/internal/bogo_shim.rs | 297 ++--
.../rustls/examples/internal/trytls_shim.rs | 28 +-
rustls-0.19.1/rustls/examples/limitedclient.rs | 51 +
.../rustls}/examples/simple_0rtt_client.rs | 16 +-
rustls-0.19.1/rustls/examples/simpleclient.rs | 55 +
{rustls => rustls-0.19.1}/rustls/src/anchors.rs | 42 +-
{rustls => rustls-0.19.1}/rustls/src/bs_debug.rs | 0
rustls-0.19.1/rustls/src/check.rs | 79 ++
{rustls => rustls-0.19.1}/rustls/src/cipher.rs | 280 ++--
.../rustls/src/client/common.rs | 38 +-
.../rustls/src/client/handy.rs | 64 +-
{rustls => rustls-0.19.1}/rustls/src/client/hs.rs | 552 +++++---
{rustls => rustls-0.19.1}/rustls/src/client/mod.rs | 251 ++--
.../rustls/src/client/tls12.rs | 484 ++++---
.../rustls/src/client/tls13.rs | 836 +++++++-----
{rustls => rustls-0.19.1}/rustls/src/error.rs | 92 +-
{rustls => rustls-0.19.1}/rustls/src/hash_hs.rs | 24 +-
{rustls => rustls-0.19.1}/rustls/src/key.rs | 9 +-
.../rustls/src/key_schedule.rs | 415 ++++--
{rustls => rustls-0.19.1}/rustls/src/keylog.rs | 97 +-
{rustls => rustls-0.19.1}/rustls/src/lib.rs | 119 +-
.../rustls/src/manual/features.rs | 6 +-
.../rustls/src/manual/howto.rs | 0
.../rustls/src/manual/implvulns.rs | 0
{rustls => rustls-0.19.1}/rustls/src/manual/mod.rs | 0
.../rustls/src/manual/tlsvulns.rs | 2 +-
{rustls => rustls-0.19.1}/rustls/src/msgs/alert.rs | 7 +-
{rustls => rustls-0.19.1}/rustls/src/msgs/base.rs | 16 +-
{rustls => rustls-0.19.1}/rustls/src/msgs/ccs.rs | 0
{rustls => rustls-0.19.1}/rustls/src/msgs/codec.rs | 37 +-
.../rustls/src/msgs/deframer.rs | 113 +-
{rustls => rustls-0.19.1}/rustls/src/msgs/enums.rs | 7 +-
.../rustls/src/msgs/enums_test.rs | 41 +-
.../rustls/src/msgs/fragmenter.rs | 89 +-
.../rustls/src/msgs/handshake-test.1.bin | Bin
.../rustls/src/msgs/handshake.rs | 302 ++---
.../rustls/src/msgs/handshake_test.rs | 801 +++++++----
.../rustls/src/msgs/hsjoiner.rs | 64 +-
.../rustls/src/msgs/macros.rs | 0
.../rustls/src/msgs/message.rs | 110 +-
.../rustls/src/msgs/message_test.rs | 39 +-
{rustls => rustls-0.19.1}/rustls/src/msgs/mod.rs | 14 +-
.../rustls/src/msgs/persist.rs | 50 +-
.../rustls/src/msgs/persist_test.rs | 51 +-
{rustls => rustls-0.19.1}/rustls/src/pemfile.rs | 52 +-
{rustls => rustls-0.19.1}/rustls/src/prf.rs | 17 +-
rustls-0.19.1/rustls/src/quic.rs | 609 +++++++++
{rustls => rustls-0.19.1}/rustls/src/rand.rs | 13 +-
.../rustls/src/record_layer.rs | 13 +-
.../rustls/src/server/common.rs | 14 +-
.../rustls/src/server/handy.rs | 116 +-
{rustls => rustls-0.19.1}/rustls/src/server/hs.rs | 566 +++++---
{rustls => rustls-0.19.1}/rustls/src/server/mod.rs | 296 ++--
.../rustls/src/server/tls12.rs | 294 ++--
.../rustls/src/server/tls13.rs | 754 +++++++----
{rustls => rustls-0.19.1}/rustls/src/session.rs | 333 +++--
{rustls => rustls-0.19.1}/rustls/src/sign.rs | 204 ++-
{rustls => rustls-0.19.1}/rustls/src/stream.rs | 90 +-
{rustls => rustls-0.19.1}/rustls/src/suites.rs | 376 ++++--
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.../rustls/src/testdata/cert-duckduckgo.0.der | Bin
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.../rustls/src/testdata/cert-twitter.0.der | Bin
.../rustls/src/testdata/cert-twitter.1.der | Bin
.../rustls/src/testdata/cert-wapo.0.der | Bin
.../rustls/src/testdata/cert-wapo.1.der | Bin
.../rustls/src/testdata/cert-wapo.2.der | Bin
.../rustls/src/testdata/cert-wikipedia.0.der | Bin
.../rustls/src/testdata/cert-wikipedia.1.der | Bin
.../rustls/src/testdata/deframer-test.1.bin | Bin
.../rustls/src/testdata/deframer-test.2.bin | Bin
.../rustls/src/testdata/prf-result.1.bin | 0
.../rustls/src/testdata/prf-result.2.bin | 0
{rustls => rustls-0.19.1}/rustls/src/ticketer.rs | 50 +-
{rustls => rustls-0.19.1}/rustls/src/vecbuf.rs | 89 +-
rustls-0.19.1/rustls/src/verify.rs | 649 +++++++++
.../rustls/src/verifybench.rs | 244 ++--
rustls-0.19.1/rustls/src/x509.rs | 93 ++
{rustls => rustls-0.19.1}/rustls/tests/api.rs | 1428 ++++++++++++++------
.../rustls/tests/benchmarks.rs | 14 +-
.../rustls/tests/common/mod.rs | 186 ++-
{rustls => rustls-0.19.1}/test-ca/build-a-pki.sh | 53 +-
{rustls => rustls-0.19.1}/test-ca/ecdsa/ca.cert | 0
{rustls => rustls-0.19.1}/test-ca/ecdsa/ca.der | Bin
{rustls => rustls-0.19.1}/test-ca/ecdsa/ca.key | 0
.../test-ca/ecdsa/client.cert | 0
.../test-ca/ecdsa/client.chain | 0
.../test-ca/ecdsa/client.fullchain | 0
{rustls => rustls-0.19.1}/test-ca/ecdsa/client.key | 0
{rustls => rustls-0.19.1}/test-ca/ecdsa/client.req | 0
{rustls => rustls-0.19.1}/test-ca/ecdsa/end.cert | 0
{rustls => rustls-0.19.1}/test-ca/ecdsa/end.chain | 0
.../test-ca/ecdsa/end.fullchain | 0
{rustls => rustls-0.19.1}/test-ca/ecdsa/end.key | 0
{rustls => rustls-0.19.1}/test-ca/ecdsa/end.req | 0
{rustls => rustls-0.19.1}/test-ca/ecdsa/inter.cert | 0
{rustls => rustls-0.19.1}/test-ca/ecdsa/inter.key | 0
{rustls => rustls-0.19.1}/test-ca/ecdsa/inter.req | 0
.../test-ca/ecdsa/nistp256.pem | 0
.../test-ca/ecdsa/nistp384.pem | 0
rustls-0.19.1/test-ca/eddsa/ca.cert | 9 +
rustls-0.19.1/test-ca/eddsa/ca.der | Bin 0 -> 336 bytes
rustls-0.19.1/test-ca/eddsa/ca.key | 3 +
rustls-0.19.1/test-ca/eddsa/client.cert | 11 +
rustls-0.19.1/test-ca/eddsa/client.chain | 19 +
rustls-0.19.1/test-ca/eddsa/client.fullchain | 30 +
rustls-0.19.1/test-ca/eddsa/client.key | 3 +
rustls-0.19.1/test-ca/eddsa/client.req | 6 +
rustls-0.19.1/test-ca/eddsa/end.cert | 12 +
rustls-0.19.1/test-ca/eddsa/end.chain | 19 +
rustls-0.19.1/test-ca/eddsa/end.fullchain | 31 +
rustls-0.19.1/test-ca/eddsa/end.key | 3 +
rustls-0.19.1/test-ca/eddsa/end.req | 6 +
rustls-0.19.1/test-ca/eddsa/inter.cert | 10 +
rustls-0.19.1/test-ca/eddsa/inter.key | 3 +
rustls-0.19.1/test-ca/eddsa/inter.req | 6 +
{rustls => rustls-0.19.1}/test-ca/openssl.cnf | 0
{rustls => rustls-0.19.1}/test-ca/rsa/ca.cert | 0
{rustls => rustls-0.19.1}/test-ca/rsa/ca.der | Bin
{rustls => rustls-0.19.1}/test-ca/rsa/ca.key | 0
{rustls => rustls-0.19.1}/test-ca/rsa/client.cert | 0
{rustls => rustls-0.19.1}/test-ca/rsa/client.chain | 0
.../test-ca/rsa/client.fullchain | 0
{rustls => rustls-0.19.1}/test-ca/rsa/client.key | 0
{rustls => rustls-0.19.1}/test-ca/rsa/client.req | 0
{rustls => rustls-0.19.1}/test-ca/rsa/client.rsa | 0
{rustls => rustls-0.19.1}/test-ca/rsa/end.cert | 0
{rustls => rustls-0.19.1}/test-ca/rsa/end.chain | 0
.../test-ca/rsa/end.fullchain | 0
{rustls => rustls-0.19.1}/test-ca/rsa/end.key | 0
{rustls => rustls-0.19.1}/test-ca/rsa/end.req | 0
{rustls => rustls-0.19.1}/test-ca/rsa/end.rsa | 0
{rustls => rustls-0.19.1}/test-ca/rsa/inter.cert | 0
{rustls => rustls-0.19.1}/test-ca/rsa/inter.key | 0
{rustls => rustls-0.19.1}/test-ca/rsa/inter.req | 0
{rustls => rustls-0.19.1}/trytls/.gitignore | 0
{rustls => rustls-0.19.1}/trytls/runme | 0
825 files changed, 29732 insertions(+), 4337 deletions(-)
diff --git a/README.md b/README.md
index 1de9a73..c1ceb7d 100644
--- a/README.md
+++ b/README.md
@@ -8,9 +8,11 @@ Below list the crates:
- gbdt
- [getrandom](https://github.com/rust-random/getrandom/tree/0830ba66be8a5c019fc5ced5747c9d0a023e4d3e)
- [image](https://github.com/image-rs/image/tree/2a79d33e663d27e402c76bfc6aa5ca78b1cc9895)
+- [mio](https://github.com/tokio-rs/mio/tree/7ed74bf478230a0cfa7543901f6be6df8bb3602e)
- [num_cpus](https://github.com/seanmonstar/num_cpus/tree/e437b9d9083d717692e35d917de8674a7987dd06)
- [rand](https://github.com/rust-random/rand/tree/3543f4b0258ecec04be570bbe9dc6e50d80bd3c1)
- [ring](https://github.com/briansmith/ring/tree/9cc0d45f4d8521f467bb3a621e74b1535e118188)
- [rustface](https://github.com/atomashpolskiy/rustface/tree/93c97ed7d0fa1cc3553f5483d865292cc37ceb98)
- [rustls](https://github.com/rustls/rustls/tree/92600efb4f6cc25bfe0c133b0b922d915ed826e3)
+- [rustls-0.19.1](https://github.com/rustls/rustls/tree/3c390ef7c459cc1ef2504bd9d1fefdcb7eea1c20)
- [rusty-machine](https://github.com/AtheMathmo/rusty-machine/tree/e7cc57fc5e0f384aeb19169336deb5f66655c76a)
diff --git a/mio/.cirrus.yml b/mio/.cirrus.yml
new file mode 100644
index 0000000..a1dbf5d
--- /dev/null
+++ b/mio/.cirrus.yml
@@ -0,0 +1,27 @@
+freebsd_instance:
+ image: freebsd-12-4-release-amd64
+
+env:
+ RUST_BACKTRACE: full
+
+task:
+ name: FreeBSD
+ setup_script:
+ - pkg install -y curl
+ - curl https://sh.rustup.rs -sSf --output rustup.sh
+ - sh rustup.sh -y --profile minimal
+ cargo_cache:
+ folder: $HOME/.cargo/registry
+ build_script:
+ - . $HOME/.cargo/env
+ - cargo build
+ - cargo build --no-default-features
+ amd64_test_script:
+ - . $HOME/.cargo/env
+ - cargo test --all-features
+ i386_test_script:
+ - . $HOME/.cargo/env
+ - rustup target add i686-unknown-freebsd
+ - cargo test --target i686-unknown-freebsd --all-features
+ before_cache_script:
+ - rm -rf $HOME/.cargo/registry/index
diff --git a/mio/.github/CODEOWNERS b/mio/.github/CODEOWNERS
new file mode 100644
index 0000000..f860f8e
--- /dev/null
+++ b/mio/.github/CODEOWNERS
@@ -0,0 +1,2 @@
+# Windows changes
+/src/sys/windows/ @carllerche
\ No newline at end of file
diff --git a/mio/.github/workflows/ci.yml b/mio/.github/workflows/ci.yml
new file mode 100644
index 0000000..731deeb
--- /dev/null
+++ b/mio/.github/workflows/ci.yml
@@ -0,0 +1,142 @@
+name: CI
+on:
+ push:
+ branches: [ "master", "v0.7.x" ]
+ pull_request:
+ branches: [ "master", "v0.7.x" ]
+env:
+ CARGO_TERM_COLOR: always
+ RUST_BACKTRACE: full
+ CI: true
+
+permissions:
+ contents: read # to fetch code (actions/checkout)
+
+jobs:
+ Test:
+ runs-on: ${{ matrix.os }}
+ timeout-minutes: 10
+ strategy:
+ fail-fast: false
+ matrix:
+ os: ["ubuntu-latest", "macos-latest", "windows-latest"]
+ steps:
+ - uses: actions/checkout@v3
+ - uses: dtolnay/rust-toolchain@stable
+ - name: Install Cargo-hack
+ run: cargo install --debug cargo-hack
+ - name: Check all features
+ run: cargo hack check --feature-powerset
+ - name: Tests
+ run: cargo test --all-features
+ - name: Tests release build
+ run: cargo test --release --all-features
+ MinimalVersions:
+ runs-on: ${{ matrix.os }}
+ timeout-minutes: 10
+ strategy:
+ fail-fast: false
+ matrix:
+ os: ["ubuntu-latest", "macos-latest", "windows-latest"]
+ steps:
+ - uses: actions/checkout@v3
+ - uses: dtolnay/rust-toolchain@nightly
+ - name: Install minimal verions
+ run: cargo update -Zminimal-versions
+ - name: Tests
+ run: cargo test --all-features
+ MSRV:
+ runs-on: ubuntu-latest
+ timeout-minutes: 10
+ steps:
+ - uses: actions/checkout@v3
+ - uses: dtolnay/rust-toolchain@master
+ with:
+ # NOTE: When updating also update Clippy flags, some are disabled due to
+ # MSRV.
+ toolchain: 1.46.0
+ - name: Check
+ # We only run check allowing us to use newer features in tests.
+ run: cargo check --all-features
+ Nightly:
+ runs-on: ubuntu-latest
+ timeout-minutes: 10
+ steps:
+ - uses: actions/checkout@v3
+ - uses: dtolnay/rust-toolchain@nightly
+ - name: Tests
+ run: cargo test --all-features
+ Clippy:
+ runs-on: ubuntu-latest
+ timeout-minutes: 10
+ steps:
+ - uses: actions/checkout@v3
+ - uses: dtolnay/rust-toolchain@stable
+ with:
+ components: clippy
+ - name: Clippy
+ # NOTE: `clippy::uninlined-format-args` is enabled due to MSRV.
+ run: cargo clippy --all-targets --all-features -- -D warnings -A clippy::cognitive-complexity -A clippy::uninlined-format-args
+ Docs:
+ runs-on: ubuntu-latest
+ timeout-minutes: 10
+ steps:
+ - uses: actions/checkout@v3
+ - uses: dtolnay/rust-toolchain@stable
+ - name: Check docs
+ run: RUSTDOCFLAGS="-D warnings" cargo doc --no-deps --all-features
+ Rustfmt:
+ runs-on: ubuntu-latest
+ timeout-minutes: 10
+ steps:
+ - uses: actions/checkout@v3
+ - uses: dtolnay/rust-toolchain@stable
+ with:
+ components: rustfmt
+ - name: Check formatting
+ # FIXME: for some reason this doesn't actually check all files.
+ # So instead we run `rustfmt` directly on each file.
+ #cargo fmt --all -- --check
+ run: find src tests examples -type f -iname "*.rs" | xargs rustfmt --check
+ CheckTargets:
+ runs-on: ubuntu-latest
+ timeout-minutes: 10
+ steps:
+ - uses: actions/checkout@v3
+ - uses: dtolnay/rust-toolchain@stable
+ with:
+ components: clippy
+ - name: Install all targets
+ run: make install_targets
+ - name: Install Cargo-hack
+ run: cargo install --debug cargo-hack
+ - name: Check all targets
+ run: make check_all_targets
+ Sanitizer:
+ runs-on: ubuntu-latest
+ timeout-minutes: 10
+ strategy:
+ fail-fast: false
+ matrix:
+ sanitizer: [address, leak, memory, thread]
+ steps:
+ - uses: actions/checkout@v3
+ - uses: dtolnay/rust-toolchain@nightly
+ - name: Add rust source
+ run: rustup component add rust-src
+ - name: Run tests with sanitizer
+ run: make test_sanitizer SAN=${{ matrix.sanitizer }}
+ # Single job required to merge the pr.
+ Passed:
+ runs-on: ubuntu-latest
+ needs:
+ - Test
+ - MinimalVersions
+ - MSRV
+ - Nightly
+ - Clippy
+ - Docs
+ - Rustfmt
+ - CheckTargets
+ steps:
+ - run: exit 0
diff --git a/mio/.gitignore b/mio/.gitignore
new file mode 100644
index 0000000..ac15427
--- /dev/null
+++ b/mio/.gitignore
@@ -0,0 +1,4 @@
+.cargo
+Cargo.lock
+target*
+libs
diff --git a/mio/CHANGELOG.md b/mio/CHANGELOG.md
new file mode 100644
index 0000000..e45a2b3
--- /dev/null
+++ b/mio/CHANGELOG.md
@@ -0,0 +1,620 @@
+# 0.8.6
+
+## Added
+
+* `Interest::PRIORITY` on Linux and Android, to trigger `Event::is_priority`
+ (https://github.com/tokio-rs/mio/pull/1647).
+
+## Changed
+
+* Updated windows-sys to 0.45
+ (https://github.com/tokio-rs/mio/pull/1644).
+* We started testing with sanitizers on the CI
+ (https://github.com/tokio-rs/mio/pull/1648).
+
+## Fixed
+
+* A number of potential fd leaks when setup resulted in an error right after
+ creation (https://github.com/tokio-rs/mio/pull/1636).
+* Less truncating for timeout values in `Poll::poll`
+ (https://github.com/tokio-rs/mio/pull/1642).
+
+# 0.8.5
+
+## Changed
+
+* Updated `windows-sys` to 0.42.0
+ (https://github.com/tokio-rs/mio/pull/1624).
+* Officially document Wine as not supported, some people claimed it worked,
+ other claims it doesn't, but nobody stepped up to fix the problem
+ (https://github.com/tokio-rs/mio/pull/1596).
+* Switch to GitHub Actions
+ (https://github.com/tokio-rs/mio/pull/1598, https://github.com/tokio-rs/mio/pull/1601).
+* Documented the current Poll::poll time behaviour
+ (https://github.com/tokio-rs/mio/pull/1603).
+
+## Fixed
+
+* Timeout less than one millisecond becoming zero millsiconds
+ (https://github.com/tokio-rs/mio/pull/1615, https://github.com/tokio-rs/mio/pull/1616)
+* Undefined reference to `epoll\_create1` on Android API level < 21.
+ (https://github.com/tokio-rs/mio/pull/1590).
+
+# 0.8.4
+
+## Added
+
+* Support `Registery::try_clone` on `wasm32-wasi`
+ (https://github.com/tokio-rs/mio/pull/1576).
+* Add docs about polling without registering event sources
+ (https://github.com/tokio-rs/mio/pull/1585).
+
+# 0.8.3
+
+## Changed
+
+* Replace `winapi` dependency with `windows-sys`.
+ (https://github.com/tokio-rs/mio/pull/1556).
+* Future proofed the kevent ABI for FreeBSD
+ (https://github.com/tokio-rs/mio/pull/1572).
+
+## Fixed
+
+* Improved support for Redox, making it possible to run on stable Rust
+ (https://github.com/tokio-rs/mio/pull/1555).
+* Don't ignore EAGAIN in UDS connect call
+ (https://github.com/tokio-rs/mio/pull/1564).
+* Documentation of `TcpStream::connect`
+ (https://github.com/tokio-rs/mio/pull/1565).
+
+# 0.8.2
+
+## Added
+
+* Experimental support for Redox.
+
+# 0.8.1
+
+## Added
+
+* Add `try_io` method to all I/O types (#1551). This execute a user defined I/O
+ closure while updating Mio's internal state ensuring that the I/O type
+ receives more events if it hits a WouldBlock error. This is added to the
+ following types:
+ * `TcpStream`
+ * `UdpSocket`
+ * `UnixDatagram`
+ * `UnixStream`
+ * `unix::pipe::Sender`
+ * `unix::pipe::Receiver`
+* Basic, experimental support for `wasm32-wasi` target (#1549). Note that a lot
+ of time type are still missing, e.g. the `Waker`, and may never be possible to
+ implement.
+
+# 0.8.0
+
+## Removed
+
+* Deprecated features (https://github.com/tokio-rs/mio/commit/105f8f2afb57b01ddea716a0aa9720f226c520e3):
+ * extra-docs (always enabled)
+ * tcp (replaced with "net" feature).
+ * udp (replaced with "net" feature).
+ * uds (replaced with "net" feature).
+ * pipe (replaced with "os-ext" feature).
+ * os-util (replaced with "os-ext" feature).
+* `TcpSocket` type
+ (https://github.com/tokio-rs/mio/commit/02e9be41f27daf822575444fdd2b3067433a5996).
+ The socket2 crate provides all the functionality and more.
+* Support for Solaris, it never really worked anyway
+ (https://github.com/tokio-rs/mio/pull/1528).
+
+## Changes
+
+* Update minimum Rustc version (MSVR) to 1.46.0
+ (https://github.com/tokio-rs/mio/commit/5c577efecd23750a9a3e0f6ad080ab98f14a255d).
+
+## Added
+
+* `UdpSocket::peer_addr`
+ (https://github.com/tokio-rs/mio/commit/5fc104d08e0e74c8a19247f7cba0f058699fc438).
+
+# 0.7.14
+
+## Fixes
+
+* Remove use unsound internal macro (#1519).
+
+## Added
+
+* `sys::unix::SocketAddr::as_abstract_namespace()` (#1520).
+
+# 0.7.13
+
+## Fixes
+
+* Fix `Registry::try_clone` invalid usage of `F_DUPFD_CLOEXEC` (#1497,
+ https://github.com/tokio-rs/mio/commit/2883f5c1f35bf1a59682c5ffc4afe6b97d7d6e68).
+
+# 0.7.12 (yanked)
+
+## Fixes
+
+* Set `FD_CLOEXEC` when calling `Registry::try_clone`
+ (https://github.com/tokio-rs/mio/commit/d1617b567ff6bc669d71e367d22e0e93ff7e2e24 for epoll and
+ (https://github.com/tokio-rs/mio/commit/b367a05e408ca90a26383c3aa16d8a16f019dc59 for kqueue).
+
+# 0.7.11
+
+## Fixes
+
+* Fix missing feature of winapi.
+ (https://github.com/tokio-rs/mio/commit/a7e61db9e3c2b929ef1a33532bfcc22045d163ce).
+
+# 0.7.10
+
+## Fixes
+
+* Fix an instance of not doc(cfg(.*))
+ (https://github.com/tokio-rs/mio/commit/25e8f911357c740034f10a170dfa4ea1b28234ce).
+
+# 0.7.9
+
+## Fixes
+
+* Fix error handling in `NamedPipe::write`
+ (https://github.com/tokio-rs/mio/commit/aec872be9732e5c6685100674278be27f54a271b).
+* Use `accept(2)` on x86 Android instead of `accept4(2)`
+ (https://github.com/tokio-rs/mio/commit/6f86b925d3e48f30905d5cfa54348acf3f1fa036,
+ https://github.com/tokio-rs/mio/commit/8d5414880ab82178305ac1d2c16d715e58633d3e).
+* Improve error message when opening AFD device
+ (https://github.com/tokio-rs/mio/commit/139f7c4422321eb4a17b14ae2c296fddd19a8804).
+
+# 0.7.8
+
+## Fixes
+
+* Fix `TcpStream::set_linger` on macOS
+ (https://github.com/tokio-rs/mio/commit/175773ce02e85977db81224c782c8d140aba8543).
+* Fix compilation on DragonFlyBSD
+ (https://github.com/tokio-rs/mio/commit/b51af46b28871f8dd3233b490ee62237ffed6a26).
+
+# 0.7.7
+
+## Added
+
+* `UdpSocket::only_v6`
+ (https://github.com/tokio-rs/mio/commit/0101e05a800f17fb88f4315d9b9fe0f08cca6e57).
+* `Clone` implementation for `Event`
+ (https://github.com/tokio-rs/mio/commit/26540ebbae89df6d4d08465c56f715d8f2addfc3).
+* `AsRawFd` implementation for `Registry`
+ (https://github.com/tokio-rs/mio/commit/f70daa72da0042b1880256164774c3286d315a02).
+* `Read` and `Write` implementation for `&unix::pipe::Sender` and `Receiver`,
+ that is on the reference to them, an implementation existed on the types
+ themselves already
+ (https://github.com/tokio-rs/mio/commit/1be481dcbbcb6906364008b5d61e7f53cddc3eb3).
+
+## Fixes
+
+* Underflow in `SocketAddr::address`
+ (https://github.com/tokio-rs/mio/commit/6d3fa69240cd4bb95e9d34605c660c30245a18bd).
+* Android build with the net feature enabled, but with os-poll disabled
+ (https://github.com/tokio-rs/mio/commit/49d8fd33e026ad6e2c055d05d6667180ba2af7be).
+* Solaris build with the net feature enabled, but with os-poll disabled
+ (https://github.com/tokio-rs/mio/commit/a6e025e9d9511639ec106ebedc0dd312bdc9be12).
+* Ensure that `Waker::wake` works on illumos systems with poor `pipe(2)` and
+ `epoll(2)` interaction using `EPOLLET`
+ (https://github.com/tokio-rs/mio/commit/943d4249dcc17cd8b4d2250c4fa19116097248fa).
+* Fix `unix::pipe` on illumos
+ (https://github.com/tokio-rs/mio/commit/0db49f6d5caf54b12176821363d154384357e70a).
+
+# 0.7.6
+
+## Added
+
+* `net` feature, replaces `tcp`, `udp` and `uds` features
+ (https://github.com/tokio-rs/mio/commit/a301ba520a8479b459c4acdcefa4a7c5eea818c7).
+* `os-ext` feature, replaces `os-util` and `pipe` features
+ (https://github.com/tokio-rs/mio/commit/f5017fae8a3d3bb4b4cada25b01a2d76a406badc).
+* Added keepalive support to `TcpSocket`
+ (https://github.com/tokio-rs/mio/commit/290c43a96662d54ab7c4b8814e5a9f9a9e523fda).
+* `TcpSocket::set_{send, recv}_buffer_size`
+ (https://github.com/tokio-rs/mio/commit/40c4af79bf5b32b8fbdbf6f2e5c16290e1d3d406).
+* `TcpSocket::get_linger`
+ (https://github.com/tokio-rs/mio/commit/13e82ced655bbb6e2729226e485a7de9f2c2ccd9).
+* Implement `IntoRawFd` for `TcpSocket`
+ (https://github.com/tokio-rs/mio/commit/50548ed45d0b2c98f1f2e003e210d14195284ef4).
+
+## Deprecated
+
+* The `tcp`, `udp` and `uds` features, replaced by a new `net` feature.
+ (https://github.com/tokio-rs/mio/commit/a301ba520a8479b459c4acdcefa4a7c5eea818c7).
+* The `extra-docs` feature, now enabled by default.
+ (https://github.com/tokio-rs/mio/commit/25731e8688a2d91c5c700674a2c2d3841240ece1).
+* The `os-util` and `pipe` features, replaced by a new `os-ext` feature.
+ (https://github.com/tokio-rs/mio/commit/f5017fae8a3d3bb4b4cada25b01a2d76a406badc).
+
+## Fixes
+
+* Incorrect assumption of the layout of `std::net::SocketAddr`. Previously Mio
+ would assume that `SocketAddrV{4,6}` had the same layout as
+ `libc::sockaddr_in(6)`, however this is not guaranteed by the standard
+ library.
+ (https://github.com/tokio-rs/mio/commit/152e0751f0be1c9b0cbd6778645b76bcb0eba93c).
+* Also bumped the miow dependency to version 0.3.6 to solve the same problem as
+ above.
+
+# 0.7.5
+
+## Added
+
+* `TcpSocket::get_localaddr()` retrieves local address
+ (https://github.com/tokio-rs/mio/commit/b41a022b2242eef1969c70c8ba93e04c528dba47).
+* `TcpSocket::set_reuseport()` & `TcpSocket::get_reuseport()` configures and reads `SO_REUSEPORT`
+ (https://github.com/tokio-rs/mio/commit/183bbe409ab69cbf9db41d0263b41ec86202d9a0).
+* `unix:pipe()` a wrapper around pipe(2) sys call
+ (https://github.com/tokio-rs/mio/commit/2b7c0967a7362303946deb3d4ca2ae507af6c72d).
+* Add a check that a single Waker is active per Poll instance (only in debug mode)
+ (https://github.com/tokio-rs/mio/commit/f4874f28b32efcf4841691884c65a89734d96a56).
+* Added `Interest:remove()`
+ (https://github.com/tokio-rs/mio/commit/b8639c3d9ac07bb7e2e27685680c8a6510fa1357).
+
+# 0.7.4
+
+## Fixes
+
+* lost "socket closed" events on windows
+ (https://github.com/tokio-rs/mio/commit/50c299aca56c4a26e5ed20c283007239fbe6a7a7).
+
+## Added
+
+* `TcpSocket::set_linger()` configures SO_LINGER
+ (https://github.com/tokio-rs/mio/commit/3b4096565c1a879f651b8f8282ecdcbdbd5c92d3).
+
+# 0.7.3
+
+## Added
+
+* `TcpSocket` for configuring a TCP socket before connecting or listening
+ (https://github.com/tokio-rs/mio/commit/5b09e60d0f64419b989bda88c86a3147334a03b3).
+
+# 0.7.2
+
+## Added
+
+* Windows named pipe support.
+ (https://github.com/tokio-rs/mio/commit/52e8c2220e87696d20f13561402bcaabba4136ed).
+
+# 0.7.1
+
+## Reduced support for 32-bit Apple targets
+
+In January 2020 Rust reduced its support for 32-bit Apple targets
+(https://blog.rust-lang.org/2020/01/03/reducing-support-for-32-bit-apple-targets.html).
+Starting with v0.7.1 Mio will do the same as we're no longer checking 32 bit
+iOS/macOS on our CI.
+
+## Added
+
+* Support for illumos
+ (https://github.com/tokio-rs/mio/commit/976f2354d0e8fbbb64fba3bf017d7131f9c369a0).
+* Report `epoll(2)`'s `EPOLLERR` event as `Event::is_write_closed` if it's the
+ only event
+ (https://github.com/tokio-rs/mio/commit/0c77b5712d675eeb9bd43928b5dd7d22b2c7ac0c).
+* Optimised event::Iter::{size_hint, count}
+ (https://github.com/tokio-rs/mio/commit/40df934a11b05233a7796c4de19a4ee06bc4e03e).
+
+## Fixed
+
+* Work around Linux kernel < 2.6.37 bug on 32-bits making timeouts longer then
+ ~30 minutes effectively infinite
+ (https://github.com/tokio-rs/mio/commit/d555991f5ee81f6c1eec0fe481557d3d5b8d5ff4).
+* Set `SO_NOSIGPIPE` on all sockets (not just UDP) on for Apple targets
+ (https://github.com/tokio-rs/mio/commit/b8bbdcb0d3236f4c4acb257996d42a88dc9987d9).
+* Properly handle `POLL_ABORT` on Windows
+ (https://github.com/tokio-rs/mio/commit/a98da62b3ed1eeed1770aaca12f46d647e4fa749).
+* Improved error handling around failing `SIO_BASE_HANDLE` calls on Windows
+ (https://github.com/tokio-rs/mio/commit/b15fc18458a79ef8a51f73effa92548650f4e5dc).
+
+## Changed
+
+* On NetBSD we now use `accept4(2)`
+ (https://github.com/tokio-rs/mio/commit/4e306addc7144f2e02a7e8397c220b179a006a19).
+* The package uploaded to crates.io should be slightly smaller
+ (https://github.com/tokio-rs/mio/commit/eef8d3b9500bc0db957cd1ac68ee128ebc68351f).
+
+## Removed
+
+* Dependency on `lazy_static` on Windows
+ (https://github.com/tokio-rs/mio/commit/57e4c2a8ac153bc7bb87829e22cf0a21e3927e8a).
+
+# 0.7.0
+
+Version 0.7 of Mio contains various major changes compared to version 0.6.
+Overall a large number of API changes have been made to reduce the complexity of
+the implementation and remove overhead where possible.
+
+Please refer to the [blog post about
+0.7-alpha.1](https://tokio.rs/blog/2019-12-mio-v0.7-alpha.1/) for additional
+information.
+
+## Added
+
+* `Interest` structure that replaces `Ready` in registering event sources.
+* `Registry` structure that separates the registering and polling functionality.
+* `Waker` structure that allows another thread to wake a thread polling `Poll`.
+* Unix Domain Socket (UDS) types: `UnixDatagram`, `UnixListener` and
+ `UnixStream`.
+
+## Removed
+
+* All code deprecated in 0.6 was removed in 0.7.
+* Support for Fuchsia was removed as the code was unmaintained.
+* Support for Bitrig was removed, rustc dropped support for it also.
+* `UnixReady` was merged into `Ready`.
+* Custom user-space readiness queue was removed, this includes the public
+ `Registration` and `SetReadiness` types.
+* `PollOpt` was removed and all registrations use edge-triggers. See the upgrade
+ guide on how to process event using edge-triggers.
+* The network types (types in the `net` module) now support only the same API as
+ found in the standard library, various methods on the types were removed.
+* `TcpStream` now supports vectored I/O.
+* `Poll::poll_interruptible` was removed. Instead `Poll::poll` will now return
+ an error if one occurs.
+* `From<usize>` is removed from `Token`, the internal field is still public, so
+ `Token(my_token)` can still be used.
+
+## Changed
+
+* Various documentation improvements were made around correct usage of `Poll`
+ and registered event sources. It is recommended to reread the documentation of
+ at least `event::Source` and `Poll`.
+* Mio now uses Rust 2018 and rustfmt for all code.
+* `Event` was changed to be a wrapper around the OS event. This means it can be
+ significantly larger on some OSes.
+* `Ready` was removed and replaced with various `is_*` methods on `Event`. For
+ example instead checking for readable readiness using
+ `Event::ready().is_readable()`, you would call `Event::is_readable()`.
+* `Ready::is_hup` was removed in favour of `Event::is_read_closed` and
+ `Event::is_write_closed`.
+* The Iterator implementation of `Events` was changed to return `&Event`.
+* `Evented` was renamed to `event::Source` and now takes mutable reference to
+ the source.
+* Minimum supported Rust version was increased to 1.39.
+* By default Mio now uses a shim implementation. To enable the full
+ implementation, that uses the OS, enable the `os-oll` feature. To enable the
+ network types use `tcp`, `udp` and/or `uds`. For more documentation on the
+ features see the `feature` module in the API documentation (requires the
+ `extra-docs` feature).
+* The entire Windows implementation was rewritten.
+* Various optimisation were made to reduce the number of system calls in
+ creating and using sockets, e.g. making use of `accept4(2)`.
+* The `fmt::Debug` implementation of `Events` is now actually useful as it
+ prints all `Event`s.
+
+# 0.6.23 (Dec 01, 2020)
+
+### Changed
+- **MSRV**: Increased the MSRV from 1.18.0 (Jun 8, 2017) to 1.31.0 (Dec 6,
+ 2018)
+ (https://github.com/tokio-rs/mio/commit/4879e0d32ddfd98e762fc87240e594a3ad8fca30).
+
+### Fixed
+- Work around Linux kernel < 2.6.37 bug on 32-bits making timeouts longer then
+ ~30 minutes effectively infinite
+ (https://github.com/tokio-rs/mio/commit/e7cba59950e9c9fa6194e29b5b1e72029e3df455).
+- Update miow and net2 depedencies to get rid of invalid memory layout assumption
+ (https://github.com/tokio-rs/mio/commit/13f02ac0a86d7c0c0001e5ff8960a0b4340d075c).
+
+# 0.6.22 (May 01, 2020)
+
+### Added
+- Add support for illumos target (#1294)
+
+# 0.6.21 (November 27, 2019)
+
+### Fixed
+- remove `=` dependency on `cfg-if`.
+
+# 0.6.20 (November 21, 2019)
+
+### Fixed
+- Use default IOCP concurrency value (#1161).
+- setting FD_CLOEXEC in pipe (#1095).
+
+# 0.6.19 (May 28, 2018)
+
+### Fixed
+- Do not trigger HUP events on kqueue platforms (#958).
+
+# 0.6.18 (May 24, 2018)
+
+### Fixed
+- Fix compilation on kqueue platforms with 32bit C long (#948).
+
+# 0.6.17 (May 15, 2018)
+
+### Fixed
+- Don't report `RDHUP` as `HUP` (#939)
+- Fix lazycell related compilation issues.
+- Fix EPOLLPRI conflicting with READABLE
+- Abort process on ref count overflows
+
+### Added
+- Define PRI on all targets
+
+# 0.6.16 (September 5, 2018)
+
+* Add EPOLLPRI readiness to UnixReady on supported platforms (#867)
+* Reduce spurious awaken calls (#875)
+
+# 0.6.15 (July 3, 2018)
+
+* Implement `Evented` for containers (#840).
+* Fix android-aarch64 build (#850).
+
+# 0.6.14 (March 8, 2018)
+
+* Add `Poll::poll_interruptible` (#811)
+* Add `Ready::all` and `usize` conversions (#825)
+
+# 0.6.13 (February 5, 2018)
+
+* Fix build on DragonFlyBSD.
+* Add `TcpListener::from_std` that does not require the socket addr.
+* Deprecate `TcpListener::from_listener` in favor of from_std.
+
+# 0.6.12 (January 5, 2018)
+
+* Add `TcpStream::peek` function (#773).
+* Raise minimum Rust version to 1.18.0.
+* `Poll`: retry select() when interrupted by a signal (#742).
+* Deprecate `Events` index access (#713).
+* Add `Events::clear` (#782).
+* Add support for `lio_listio` (#780).
+
+# 0.6.11 (October 25, 2017)
+
+* Allow register to take empty interest (#640).
+* Fix bug with TCP errors on windows (#725).
+* Add TcpListener::accept_std (#733).
+* Update IoVec to fix soundness bug -- includes behavior change. (#747).
+* Minimum Rust version is now 1.14.0.
+* Fix Android x86_64 build.
+* Misc API & doc polish.
+
+# 0.6.10 (July 27, 2017)
+
+* Experimental support for Fuchsia
+* Add `only_v6` option for UDP sockets
+* Fix build on NetBSD
+* Minimum Rust version is now 1.13.0
+* Assignment operators (e.g. `|=`) are now implemented for `Ready`
+
+# 0.6.9 (June 7, 2017)
+
+* More socket options are exposed through the TCP types, brought in through the
+ `net2` crate.
+
+# 0.6.8 (May 26, 2017)
+
+* Support Fuchia
+* POSIX AIO support
+* Fix memory leak caused by Register::new2
+* Windows: fix handling failed TCP connections
+* Fix build on aarch64-linux-android
+* Fix usage of `O_CLOEXEC` with `SETFL`
+
+# 0.6.7 (April 27, 2017)
+
+* Ignore EPIPE coming out of `kevent`
+* Timer thread should exit when timer is dropped.
+
+# 0.6.6 (March 22, 2017)
+
+* Add send(), recv() and connect() to UDPSocket.
+* Fix bug in custom readiness queue
+* Move net types into `net` module
+
+# 0.6.5 (March 14, 2017)
+
+* Misc improvements to kqueue bindings
+* Add official support for iOS, Android, BSD
+* Reimplement custom readiness queue
+* `Poll` is now `Sync`
+* Officially deprecate non-core functionality (timers, channel, etc...)
+* `Registration` now implements `Evented`
+* Fix bug around error conditions with `connect` on windows.
+* Use iovec crate for scatter / gather operations
+* Only support readable and writable readiness on all platforms
+* Expose additional readiness in a platform specific capacity
+
+# 0.6.4 (January 24, 2017)
+
+* Fix compilation on musl
+* Add `TcpStream::from_stream` which converts a std TCP stream to Mio.
+
+# 0.6.3 (January 22, 2017)
+
+* Implement readv/writev for `TcpStream`, allowing vectored reads/writes to
+ work across platforms
+* Remove `nix` dependency
+* Implement `Display` and `Error` for some channel error types.
+* Optimize TCP on Windows through `SetFileCompletionNotificationModes`
+
+# 0.6.2 (December 18, 2016)
+
+* Allow registration of custom handles on Windows (like `EventedFd` on Unix)
+* Send only one byte for the awakener on Unix instead of four
+* Fix a bug in the timer implementation which caused an infinite loop
+
+# 0.6.1 (October 30, 2016)
+
+* Update dependency of `libc` to 0.2.16
+* Fix channel `dec` logic
+* Fix a timer bug around timeout cancellation
+* Don't allocate buffers for TCP reads on Windows
+* Touched up documentation in a few places
+* Fix an infinite looping timer thread on OSX
+* Fix compile on 32-bit OSX
+* Fix compile on FreeBSD
+
+# 0.6.0 (September 2, 2016)
+
+* Shift primary API towards `Poll`
+* `EventLoop` and types to `deprecated` mod. All contents of the
+ `deprecated` mod will be removed by Mio 1.0.
+* Increase minimum supported Rust version to 1.9.0
+* Deprecate unix domain socket implementation in favor of using a
+ version external to Mio. For example: https://github.com/alexcrichton/mio-uds.
+* Remove various types now included in `std`
+* Updated TCP & UDP APIs to match the versions in `std`
+* Enable implementing `Evented` for any type via `Registration`
+* Rename `IoEvent` -> `Event`
+* Access `Event` data via functions vs. public fields.
+* Expose `Events` as a public type that is passed into `Poll`
+* Use `std::time::Duration` for all APIs that require a time duration.
+* Polled events are now retrieved via `Events` type.
+* Implement `std::error::Error` for `TimerError`
+* Relax `Send` bound on notify messages.
+* Remove `Clone` impl for `Timeout` (future proof)
+* Remove `mio::prelude`
+* Remove `mio::util`
+* Remove dependency on bytes
+
+# 0.5.0 (December 3, 2015)
+
+* Windows support (#239)
+* NetBSD support (#306)
+* Android support (#295)
+* Don't re-export bytes types
+* Renamed `EventLoop::register_opt` to `EventLoop::register` (#257)
+* `EventLoopConfig` is now a builder instead of having public struct fields. It
+ is also no longer `Copy`. (#259)
+* `TcpSocket` is no longer exported in the public API (#262)
+* Integrate with net2. (#262)
+* `TcpListener` now returns the remote peer address from `accept` as well (#275)
+* The `UdpSocket::{send_to, recv_from}` methods are no longer generic over `Buf`
+ or `MutBuf` but instead take slices directly. The return types have also been
+ updated to return the number of bytes transferred. (#260)
+* Fix bug with kqueue where an error on registration prevented the
+ changelist from getting flushed (#276)
+* Support sending/receiving FDs over UNIX sockets (#291)
+* Mio's socket types are permanently associated with an EventLoop (#308)
+* Reduce unnecessary poll wakeups (#314)
+
+
+# 0.4.1 (July 21, 2015)
+
+* [BUGFIX] Fix notify channel concurrency bug (#216)
+
+# 0.4.0 (July 16, 2015)
+
+* [BUGFIX] EventLoop::register requests all events, not just readable.
+* [BUGFIX] Attempting to send a message to a shutdown event loop fails correctly.
+* [FEATURE] Expose TCP shutdown
+* [IMPROVEMENT] Coalesce readable & writable into `ready` event (#184)
+* [IMPROVEMENT] Rename TryRead & TryWrite function names to avoid conflict with std.
+* [IMPROVEMENT] Provide TCP and UDP types in Mio (path to windows #155)
+* [IMPROVEMENT] Use clock_ticks crate instead of time (path to windows #155)
+* [IMPROVEMENT] Move unix specific features into mio::unix module
+* [IMPROVEMENT] TcpListener sets SO_REUSEADDR by default
diff --git a/mio/Cargo.toml b/mio/Cargo.toml
new file mode 100644
index 0000000..30392b1
--- /dev/null
+++ b/mio/Cargo.toml
@@ -0,0 +1,99 @@
+[package]
+edition = "2018"
+name = "mio"
+# When releasing to crates.io:
+# - Update CHANGELOG.md.
+# - Create git tag
+version = "0.8.6"
+license = "MIT"
+authors = [
+ "Carl Lerche <me...@carllerche.com>",
+ "Thomas de Zeeuw <th...@gmail.com>",
+ "Tokio Contributors <te...@tokio.rs>",
+]
+description = "Lightweight non-blocking I/O."
+homepage = "https://github.com/tokio-rs/mio"
+repository = "https://github.com/tokio-rs/mio"
+readme = "README.md"
+keywords = ["io", "async", "non-blocking"]
+categories = ["asynchronous"]
+include = [
+ "Cargo.toml",
+ "LICENSE",
+ "README.md",
+ "CHANGELOG.md",
+ "src/**/*.rs",
+ "examples/**/*.rs",
+]
+
+# For documentation of features see the `mio::features` module.
+[features]
+# By default Mio only provides a shell implementation.
+default = []
+
+# Enables the `Poll` and `Registry` types.
+os-poll = []
+# Enables additional OS specific extensions, e.g. Unix `pipe(2)`.
+os-ext = [
+ "os-poll",
+ "windows-sys/Win32_System_Pipes",
+ "windows-sys/Win32_Security",
+]
+# Enables `mio::net` module containing networking primitives.
+net = []
+
+[dependencies]
+log = "0.4.8"
+
+[target.'cfg(unix)'.dependencies]
+libc = "0.2.121"
+
+[target.'cfg(windows)'.dependencies.windows-sys]
+version = "0.48"
+features = [
+ "Win32_Foundation", # Basic types eg HANDLE
+ "Win32_Networking_WinSock", # winsock2 types/functions
+ "Win32_Storage_FileSystem", # Enables NtCreateFile
+ "Win32_System_IO", # IO types like OVERLAPPED etc
+ "Win32_System_WindowsProgramming", # General future used for various types/funcs
+]
+
+[target.'cfg(target_os = "wasi")'.dependencies]
+wasi = "0.11.0"
+libc = "0.2.121"
+
+[dev-dependencies]
+env_logger = { version = "0.9.3", default-features = false }
+rand = "0.8"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+targets = [
+ "aarch64-apple-ios",
+ "aarch64-linux-android",
+ "wasm32-wasi",
+ "x86_64-apple-darwin",
+ "x86_64-pc-windows-msvc",
+ "x86_64-unknown-dragonfly",
+ "x86_64-unknown-freebsd",
+ "x86_64-unknown-illumos",
+ "x86_64-unknown-linux-gnu",
+ "x86_64-unknown-netbsd",
+ "x86_64-unknown-openbsd",
+]
+
+[package.metadata.playground]
+features = ["os-poll", "os-ext", "net"]
+
+[[example]]
+name = "tcp_server"
+required-features = ["os-poll", "net"]
+
+[[example]]
+name = "tcp_listenfd_server"
+required-features = ["os-poll", "net"]
+
+[[example]]
+name = "udp_server"
+required-features = ["os-poll", "net"]
diff --git a/mio/LICENSE b/mio/LICENSE
new file mode 100644
index 0000000..3516413
--- /dev/null
+++ b/mio/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2014 Carl Lerche and other MIO contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/mio/Makefile b/mio/Makefile
new file mode 100644
index 0000000..e5316cb
--- /dev/null
+++ b/mio/Makefile
@@ -0,0 +1,43 @@
+# Targets available via Rustup that are supported.
+TARGETS ?= aarch64-apple-ios aarch64-linux-android arm-linux-androideabi i686-unknown-linux-gnu x86_64-apple-darwin x86_64-apple-ios x86_64-pc-windows-msvc x86_64-unknown-freebsd x86_64-unknown-illumos x86_64-unknown-linux-gnu x86_64-unknown-netbsd x86_64-unknown-redox
+# Example value: `nightly-x86_64-apple-darwin`.
+RUSTUP_TOOLCHAIN ?= $(shell rustup show active-toolchain | cut -d' ' -f1)
+# Architecture target. Example value: `x86_64-apple-darwin`.
+RUSTUP_TARGET ?= $(shell echo $(RUSTUP_TOOLCHAIN) | cut -d'-' -f2,3,4,5)
+
+test:
+ cargo test --all-features
+
+# Test everything for the current OS/architecture and check all targets in
+# $TARGETS.
+test_all: check_all_targets
+ cargo hack test --feature-powerset
+ cargo hack test --feature-powerset --release
+
+# NOTE: Requires a nightly compiler.
+# NOTE: Keep `RUSTFLAGS` and `RUSTDOCFLAGS` in sync to ensure the doc tests
+# compile correctly.
+test_sanitizer:
+ @if [ -z $${SAN+x} ]; then echo "Required '\$$SAN' variable is not set" 1>&2; exit 1; fi
+ RUSTFLAGS="-Z sanitizer=$$SAN -Z sanitizer-memory-track-origins" \
+ RUSTDOCFLAGS="-Z sanitizer=$$SAN -Z sanitizer-memory-track-origins" \
+ cargo test -Z build-std --all-features --target $(RUSTUP_TARGET)
+
+# Check all targets using all features.
+check_all_targets: $(TARGETS)
+$(TARGETS):
+ cargo hack check --target $@ --feature-powerset
+
+# Installs all required targets for `check_all_targets`.
+install_targets:
+ rustup target add $(TARGETS)
+
+# NOTE: when using this command you might want to change the `test` target to
+# only run a subset of the tests you're actively working on.
+dev:
+ find src/ tests/ Makefile Cargo.toml | entr -d -c $(MAKE) test
+
+clean:
+ cargo clean
+
+.PHONY: test test_all check_all_targets $(TARGETS) dev clean
diff --git a/mio/README.md b/mio/README.md
new file mode 100644
index 0000000..bebd2af
--- /dev/null
+++ b/mio/README.md
@@ -0,0 +1,179 @@
+# Mio – Metal I/O
+
+Mio is a fast, low-level I/O library for Rust focusing on non-blocking APIs and
+event notification for building high performance I/O apps with as little
+overhead as possible over the OS abstractions.
+
+[![Crates.io][crates-badge]][crates-url]
+[![MIT licensed][mit-badge]][mit-url]
+[![Build Status][actions-badge]][actions-url]
+[![Build Status][cirrus-badge]][cirrus-url]
+
+[crates-badge]: https://img.shields.io/crates/v/mio.svg
+[crates-url]: https://crates.io/crates/mio
+[mit-badge]: https://img.shields.io/badge/license-MIT-blue.svg
+[mit-url]: LICENSE
+[actions-badge]: https://github.com/tokio-rs/mio/workflows/CI/badge.svg
+[actions-url]: https://github.com/tokio-rs/mio/actions?query=workflow%3ACI+branch%3Amaster
+[cirrus-badge]: https://api.cirrus-ci.com/github/tokio-rs/mio.svg
+[cirrus-url]: https://cirrus-ci.com/github/tokio-rs/mio
+
+**API documentation**
+
+* [v0.8](https://docs.rs/mio/^0.8)
+* [v0.7](https://docs.rs/mio/^0.7)
+
+This is a low level library, if you are looking for something easier to get
+started with, see [Tokio](https://tokio.rs).
+
+## Usage
+
+To use `mio`, first add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+mio = "0.8"
+```
+
+Next we can start using Mio. The following is quick introduction using
+`TcpListener` and `TcpStream`. Note that `features = ["os-poll", "net"]` must be
+specified for this example.
+
+```rust
+use std::error::Error;
+
+use mio::net::{TcpListener, TcpStream};
+use mio::{Events, Interest, Poll, Token};
+
+// Some tokens to allow us to identify which event is for which socket.
+const SERVER: Token = Token(0);
+const CLIENT: Token = Token(1);
+
+fn main() -> Result<(), Box<dyn Error>> {
+ // Create a poll instance.
+ let mut poll = Poll::new()?;
+ // Create storage for events.
+ let mut events = Events::with_capacity(128);
+
+ // Setup the server socket.
+ let addr = "127.0.0.1:13265".parse()?;
+ let mut server = TcpListener::bind(addr)?;
+ // Start listening for incoming connections.
+ poll.registry()
+ .register(&mut server, SERVER, Interest::READABLE)?;
+
+ // Setup the client socket.
+ let mut client = TcpStream::connect(addr)?;
+ // Register the socket.
+ poll.registry()
+ .register(&mut client, CLIENT, Interest::READABLE | Interest::WRITABLE)?;
+
+ // Start an event loop.
+ loop {
+ // Poll Mio for events, blocking until we get an event.
+ poll.poll(&mut events, None)?;
+
+ // Process each event.
+ for event in events.iter() {
+ // We can use the token we previously provided to `register` to
+ // determine for which socket the event is.
+ match event.token() {
+ SERVER => {
+ // If this is an event for the server, it means a connection
+ // is ready to be accepted.
+ //
+ // Accept the connection and drop it immediately. This will
+ // close the socket and notify the client of the EOF.
+ let connection = server.accept();
+ drop(connection);
+ }
+ CLIENT => {
+ if event.is_writable() {
+ // We can (likely) write to the socket without blocking.
+ }
+
+ if event.is_readable() {
+ // We can (likely) read from the socket without blocking.
+ }
+
+ // Since the server just shuts down the connection, let's
+ // just exit from our event loop.
+ return Ok(());
+ }
+ // We don't expect any events with tokens other than those we provided.
+ _ => unreachable!(),
+ }
+ }
+ }
+}
+```
+
+## Features
+
+* Non-blocking TCP, UDP
+* I/O event queue backed by epoll, kqueue, and IOCP
+* Zero allocations at runtime
+* Platform specific extensions
+
+## Non-goals
+
+The following are specifically omitted from Mio and are left to the user
+or higher-level libraries.
+
+* File operations
+* Thread pools / multi-threaded event loop
+* Timers
+
+## Platforms
+
+Currently supported platforms:
+
+* Android (API level 21)
+* DragonFly BSD
+* FreeBSD
+* Linux
+* NetBSD
+* OpenBSD
+* Windows
+* iOS
+* macOS
+
+There are potentially others. If you find that Mio works on another
+platform, submit a PR to update the list!
+
+Mio can handle interfacing with each of the event systems of the aforementioned
+platforms. The details of their implementation are further discussed in the
+`Poll` type of the API documentation (see above).
+
+The Windows implementation for polling sockets is using the [wepoll] strategy.
+This uses the Windows AFD system to access socket readiness events.
+
+[wepoll]: https://github.com/piscisaureus/wepoll
+
+### Unsupported
+
+* Haiku, see [issue #1472]
+* Solaris, see [issue #1152]
+* Wine, see [issue #1444]
+
+[issue #1472]: https://github.com/tokio-rs/mio/issues/1472
+[issue #1152]: https://github.com/tokio-rs/mio/issues/1152
+[issue #1444]: https://github.com/tokio-rs/mio/issues/1444
+
+## Community
+
+A group of Mio users hang out on [Discord], this can be a good place to go for
+questions.
+
+[Discord]: https://discord.gg/tokio
+
+## Contributing
+
+Interested in getting involved? We would love to help you! For simple
+bug fixes, just submit a PR with the fix and we can discuss the fix
+directly in the PR. If the fix is more complex, start with an issue.
+
+If you want to propose an API change, create an issue to start a
+discussion with the community. Also, feel free to talk with us in Discord.
+
+Finally, be kind. We support the [Rust Code of Conduct](https://www.rust-lang.org/policies/code-of-conduct).
diff --git a/mio/examples/tcp_listenfd_server.rs b/mio/examples/tcp_listenfd_server.rs
new file mode 100644
index 0000000..941d7f0
--- /dev/null
+++ b/mio/examples/tcp_listenfd_server.rs
@@ -0,0 +1,209 @@
+// You can run this example from the root of the mio repo:
+// cargo run --example tcp_listenfd_server --features="os-poll net"
+// or with wasi:
+// cargo +nightly build --target wasm32-wasi --example tcp_listenfd_server --features="os-poll net"
+// wasmtime run --tcplisten 127.0.0.1:9000 --env 'LISTEN_FDS=1' target/wasm32-wasi/debug/examples/tcp_listenfd_server.wasm
+
+use mio::event::Event;
+use mio::net::{TcpListener, TcpStream};
+use mio::{Events, Interest, Poll, Registry, Token};
+use std::collections::HashMap;
+use std::io::{self, Read, Write};
+use std::str::from_utf8;
+
+// Setup some tokens to allow us to identify which event is for which socket.
+const SERVER: Token = Token(0);
+
+// Some data we'll send over the connection.
+const DATA: &[u8] = b"Hello world!\n";
+
+#[cfg(not(windows))]
+fn get_first_listen_fd_listener() -> Option<std::net::TcpListener> {
+ #[cfg(unix)]
+ use std::os::unix::io::FromRawFd;
+ #[cfg(target_os = "wasi")]
+ use std::os::wasi::io::FromRawFd;
+
+ let stdlistener = unsafe { std::net::TcpListener::from_raw_fd(3) };
+ stdlistener.set_nonblocking(true).unwrap();
+ Some(stdlistener)
+}
+
+#[cfg(windows)]
+fn get_first_listen_fd_listener() -> Option<std::net::TcpListener> {
+ // Windows does not support `LISTEN_FDS`
+ None
+}
+
+fn main() -> io::Result<()> {
+ env_logger::init();
+
+ std::env::var("LISTEN_FDS").expect("LISTEN_FDS environment variable unset");
+
+ // Create a poll instance.
+ let mut poll = Poll::new()?;
+ // Create storage for events.
+ let mut events = Events::with_capacity(128);
+
+ // Setup the TCP server socket.
+ let mut server = {
+ let stdlistener = get_first_listen_fd_listener().unwrap();
+ println!("Using preopened socket FD 3");
+ println!("You can connect to the server using `nc`:");
+ match stdlistener.local_addr() {
+ Ok(a) => println!(" $ nc {} {}", a.ip(), a.port()),
+ Err(_) => println!(" $ nc <IP> <PORT>"),
+ }
+ println!("You'll see our welcome message and anything you type will be printed here.");
+ TcpListener::from_std(stdlistener)
+ };
+
+ // Register the server with poll we can receive events for it.
+ poll.registry()
+ .register(&mut server, SERVER, Interest::READABLE)?;
+
+ // Map of `Token` -> `TcpStream`.
+ let mut connections = HashMap::new();
+ // Unique token for each incoming connection.
+ let mut unique_token = Token(SERVER.0 + 1);
+
+ loop {
+ poll.poll(&mut events, None)?;
+
+ for event in events.iter() {
+ match event.token() {
+ SERVER => loop {
+ // Received an event for the TCP server socket, which
+ // indicates we can accept an connection.
+ let (mut connection, address) = match server.accept() {
+ Ok((connection, address)) => (connection, address),
+ Err(ref e) if would_block(e) => {
+ // If we get a `WouldBlock` error we know our
+ // listener has no more incoming connections queued,
+ // so we can return to polling and wait for some
+ // more.
+ break;
+ }
+ Err(e) => {
+ // If it was any other kind of error, something went
+ // wrong and we terminate with an error.
+ return Err(e);
+ }
+ };
+
+ println!("Accepted connection from: {}", address);
+
+ let token = next(&mut unique_token);
+ poll.registry()
+ .register(&mut connection, token, Interest::WRITABLE)?;
+
+ connections.insert(token, connection);
+ },
+ token => {
+ // Maybe received an event for a TCP connection.
+ let done = if let Some(connection) = connections.get_mut(&token) {
+ handle_connection_event(poll.registry(), connection, event)?
+ } else {
+ // Sporadic events happen, we can safely ignore them.
+ false
+ };
+ if done {
+ if let Some(mut connection) = connections.remove(&token) {
+ poll.registry().deregister(&mut connection)?;
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+fn next(current: &mut Token) -> Token {
+ let next = current.0;
+ current.0 += 1;
+ Token(next)
+}
+
+/// Returns `true` if the connection is done.
+fn handle_connection_event(
+ registry: &Registry,
+ connection: &mut TcpStream,
+ event: &Event,
+) -> io::Result<bool> {
+ if event.is_writable() {
+ // We can (maybe) write to the connection.
+ match connection.write(DATA) {
+ // We want to write the entire `DATA` buffer in a single go. If we
+ // write less we'll return a short write error (same as
+ // `io::Write::write_all` does).
+ Ok(n) if n < DATA.len() => return Err(io::ErrorKind::WriteZero.into()),
+ Ok(_) => {
+ // After we've written something we'll reregister the connection
+ // to only respond to readable events.
+ registry.reregister(connection, event.token(), Interest::READABLE)?
+ }
+ // Would block "errors" are the OS's way of saying that the
+ // connection is not actually ready to perform this I/O operation.
+ Err(ref err) if would_block(err) => {}
+ // Got interrupted (how rude!), we'll try again.
+ Err(ref err) if interrupted(err) => {
+ return handle_connection_event(registry, connection, event)
+ }
+ // Other errors we'll consider fatal.
+ Err(err) => return Err(err),
+ }
+ }
+
+ if event.is_readable() {
+ let mut connection_closed = false;
+ let mut received_data = vec![0; 4096];
+ let mut bytes_read = 0;
+ // We can (maybe) read from the connection.
+ loop {
+ match connection.read(&mut received_data[bytes_read..]) {
+ Ok(0) => {
+ // Reading 0 bytes means the other side has closed the
+ // connection or is done writing, then so are we.
+ connection_closed = true;
+ break;
+ }
+ Ok(n) => {
+ bytes_read += n;
+ if bytes_read == received_data.len() {
+ received_data.resize(received_data.len() + 1024, 0);
+ }
+ }
+ // Would block "errors" are the OS's way of saying that the
+ // connection is not actually ready to perform this I/O operation.
+ Err(ref err) if would_block(err) => break,
+ Err(ref err) if interrupted(err) => continue,
+ // Other errors we'll consider fatal.
+ Err(err) => return Err(err),
+ }
+ }
+
+ if bytes_read != 0 {
+ let received_data = &received_data[..bytes_read];
+ if let Ok(str_buf) = from_utf8(received_data) {
+ println!("Received data: {}", str_buf.trim_end());
+ } else {
+ println!("Received (none UTF-8) data: {:?}", received_data);
+ }
+ }
+
+ if connection_closed {
+ println!("Connection closed");
+ return Ok(true);
+ }
+ }
+
+ Ok(false)
+}
+
+fn would_block(err: &io::Error) -> bool {
+ err.kind() == io::ErrorKind::WouldBlock
+}
+
+fn interrupted(err: &io::Error) -> bool {
+ err.kind() == io::ErrorKind::Interrupted
+}
diff --git a/mio/examples/tcp_server.rs b/mio/examples/tcp_server.rs
new file mode 100644
index 0000000..cc611ca
--- /dev/null
+++ b/mio/examples/tcp_server.rs
@@ -0,0 +1,189 @@
+// You can run this example from the root of the mio repo:
+// cargo run --example tcp_server --features="os-poll net"
+use mio::event::Event;
+use mio::net::{TcpListener, TcpStream};
+use mio::{Events, Interest, Poll, Registry, Token};
+use std::collections::HashMap;
+use std::io::{self, Read, Write};
+use std::str::from_utf8;
+
+// Setup some tokens to allow us to identify which event is for which socket.
+const SERVER: Token = Token(0);
+
+// Some data we'll send over the connection.
+const DATA: &[u8] = b"Hello world!\n";
+
+#[cfg(not(target_os = "wasi"))]
+fn main() -> io::Result<()> {
+ env_logger::init();
+
+ // Create a poll instance.
+ let mut poll = Poll::new()?;
+ // Create storage for events.
+ let mut events = Events::with_capacity(128);
+
+ // Setup the TCP server socket.
+ let addr = "127.0.0.1:9000".parse().unwrap();
+ let mut server = TcpListener::bind(addr)?;
+
+ // Register the server with poll we can receive events for it.
+ poll.registry()
+ .register(&mut server, SERVER, Interest::READABLE)?;
+
+ // Map of `Token` -> `TcpStream`.
+ let mut connections = HashMap::new();
+ // Unique token for each incoming connection.
+ let mut unique_token = Token(SERVER.0 + 1);
+
+ println!("You can connect to the server using `nc`:");
+ println!(" $ nc 127.0.0.1 9000");
+ println!("You'll see our welcome message and anything you type will be printed here.");
+
+ loop {
+ poll.poll(&mut events, None)?;
+
+ for event in events.iter() {
+ match event.token() {
+ SERVER => loop {
+ // Received an event for the TCP server socket, which
+ // indicates we can accept an connection.
+ let (mut connection, address) = match server.accept() {
+ Ok((connection, address)) => (connection, address),
+ Err(e) if e.kind() == io::ErrorKind::WouldBlock => {
+ // If we get a `WouldBlock` error we know our
+ // listener has no more incoming connections queued,
+ // so we can return to polling and wait for some
+ // more.
+ break;
+ }
+ Err(e) => {
+ // If it was any other kind of error, something went
+ // wrong and we terminate with an error.
+ return Err(e);
+ }
+ };
+
+ println!("Accepted connection from: {}", address);
+
+ let token = next(&mut unique_token);
+ poll.registry().register(
+ &mut connection,
+ token,
+ Interest::READABLE.add(Interest::WRITABLE),
+ )?;
+
+ connections.insert(token, connection);
+ },
+ token => {
+ // Maybe received an event for a TCP connection.
+ let done = if let Some(connection) = connections.get_mut(&token) {
+ handle_connection_event(poll.registry(), connection, event)?
+ } else {
+ // Sporadic events happen, we can safely ignore them.
+ false
+ };
+ if done {
+ if let Some(mut connection) = connections.remove(&token) {
+ poll.registry().deregister(&mut connection)?;
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+fn next(current: &mut Token) -> Token {
+ let next = current.0;
+ current.0 += 1;
+ Token(next)
+}
+
+/// Returns `true` if the connection is done.
+fn handle_connection_event(
+ registry: &Registry,
+ connection: &mut TcpStream,
+ event: &Event,
+) -> io::Result<bool> {
+ if event.is_writable() {
+ // We can (maybe) write to the connection.
+ match connection.write(DATA) {
+ // We want to write the entire `DATA` buffer in a single go. If we
+ // write less we'll return a short write error (same as
+ // `io::Write::write_all` does).
+ Ok(n) if n < DATA.len() => return Err(io::ErrorKind::WriteZero.into()),
+ Ok(_) => {
+ // After we've written something we'll reregister the connection
+ // to only respond to readable events.
+ registry.reregister(connection, event.token(), Interest::READABLE)?
+ }
+ // Would block "errors" are the OS's way of saying that the
+ // connection is not actually ready to perform this I/O operation.
+ Err(ref err) if would_block(err) => {}
+ // Got interrupted (how rude!), we'll try again.
+ Err(ref err) if interrupted(err) => {
+ return handle_connection_event(registry, connection, event)
+ }
+ // Other errors we'll consider fatal.
+ Err(err) => return Err(err),
+ }
+ }
+
+ if event.is_readable() {
+ let mut connection_closed = false;
+ let mut received_data = vec![0; 4096];
+ let mut bytes_read = 0;
+ // We can (maybe) read from the connection.
+ loop {
+ match connection.read(&mut received_data[bytes_read..]) {
+ Ok(0) => {
+ // Reading 0 bytes means the other side has closed the
+ // connection or is done writing, then so are we.
+ connection_closed = true;
+ break;
+ }
+ Ok(n) => {
+ bytes_read += n;
+ if bytes_read == received_data.len() {
+ received_data.resize(received_data.len() + 1024, 0);
+ }
+ }
+ // Would block "errors" are the OS's way of saying that the
+ // connection is not actually ready to perform this I/O operation.
+ Err(ref err) if would_block(err) => break,
+ Err(ref err) if interrupted(err) => continue,
+ // Other errors we'll consider fatal.
+ Err(err) => return Err(err),
+ }
+ }
+
+ if bytes_read != 0 {
+ let received_data = &received_data[..bytes_read];
+ if let Ok(str_buf) = from_utf8(received_data) {
+ println!("Received data: {}", str_buf.trim_end());
+ } else {
+ println!("Received (none UTF-8) data: {:?}", received_data);
+ }
+ }
+
+ if connection_closed {
+ println!("Connection closed");
+ return Ok(true);
+ }
+ }
+
+ Ok(false)
+}
+
+fn would_block(err: &io::Error) -> bool {
+ err.kind() == io::ErrorKind::WouldBlock
+}
+
+fn interrupted(err: &io::Error) -> bool {
+ err.kind() == io::ErrorKind::Interrupted
+}
+
+#[cfg(target_os = "wasi")]
+fn main() {
+ panic!("can't bind to an address with wasi")
+}
diff --git a/mio/examples/udp_server.rs b/mio/examples/udp_server.rs
new file mode 100644
index 0000000..95f8a83
--- /dev/null
+++ b/mio/examples/udp_server.rs
@@ -0,0 +1,85 @@
+// You can run this example from the root of the mio repo:
+// cargo run --example udp_server --features="os-poll net"
+use log::warn;
+use mio::{Events, Interest, Poll, Token};
+use std::io;
+
+// A token to allow us to identify which event is for the `UdpSocket`.
+const UDP_SOCKET: Token = Token(0);
+
+#[cfg(not(target_os = "wasi"))]
+fn main() -> io::Result<()> {
+ use mio::net::UdpSocket;
+
+ env_logger::init();
+
+ // Create a poll instance.
+ let mut poll = Poll::new()?;
+ // Create storage for events. Since we will only register a single socket, a
+ // capacity of 1 will do.
+ let mut events = Events::with_capacity(1);
+
+ // Setup the UDP socket.
+ let addr = "127.0.0.1:9000".parse().unwrap();
+
+ let mut socket = UdpSocket::bind(addr)?;
+
+ // Register our socket with the token defined above and an interest in being
+ // `READABLE`.
+ poll.registry()
+ .register(&mut socket, UDP_SOCKET, Interest::READABLE)?;
+
+ println!("You can connect to the server using `nc`:");
+ println!(" $ nc -u 127.0.0.1 9000");
+ println!("Anything you type will be echoed back to you.");
+
+ // Initialize a buffer for the UDP packet. We use the maximum size of a UDP
+ // packet, which is the maximum value of 16 a bit integer.
+ let mut buf = [0; 1 << 16];
+
+ // Our event loop.
+ loop {
+ // Poll to check if we have events waiting for us.
+ poll.poll(&mut events, None)?;
+
+ // Process each event.
+ for event in events.iter() {
+ // Validate the token we registered our socket with,
+ // in this example it will only ever be one but we
+ // make sure it's valid none the less.
+ match event.token() {
+ UDP_SOCKET => loop {
+ // In this loop we receive all packets queued for the socket.
+ match socket.recv_from(&mut buf) {
+ Ok((packet_size, source_address)) => {
+ // Echo the data.
+ socket.send_to(&buf[..packet_size], source_address)?;
+ }
+ Err(e) if e.kind() == io::ErrorKind::WouldBlock => {
+ // If we get a `WouldBlock` error we know our socket
+ // has no more packets queued, so we can return to
+ // polling and wait for some more.
+ break;
+ }
+ Err(e) => {
+ // If it was any other kind of error, something went
+ // wrong and we terminate with an error.
+ return Err(e);
+ }
+ }
+ },
+ _ => {
+ // This should never happen as we only registered our
+ // `UdpSocket` using the `UDP_SOCKET` token, but if it ever
+ // does we'll log it.
+ warn!("Got event for unexpected token: {:?}", event);
+ }
+ }
+ }
+ }
+}
+
+#[cfg(target_os = "wasi")]
+fn main() {
+ panic!("can't bind to an address with wasi")
+}
diff --git a/mio/src/event/event.rs b/mio/src/event/event.rs
new file mode 100644
index 0000000..2d85742
--- /dev/null
+++ b/mio/src/event/event.rs
@@ -0,0 +1,230 @@
+use crate::{sys, Token};
+
+use std::fmt;
+
+/// A readiness event.
+///
+/// `Event` is a readiness state paired with a [`Token`]. It is returned by
+/// [`Poll::poll`].
+///
+/// For more documentation on polling and events, see [`Poll`].
+///
+/// [`Poll::poll`]: ../struct.Poll.html#method.poll
+/// [`Poll`]: ../struct.Poll.html
+/// [`Token`]: ../struct.Token.html
+#[derive(Clone)]
+#[repr(transparent)]
+pub struct Event {
+ inner: sys::Event,
+}
+
+impl Event {
+ /// Returns the event's token.
+ pub fn token(&self) -> Token {
+ sys::event::token(&self.inner)
+ }
+
+ /// Returns true if the event contains readable readiness.
+ ///
+ /// # Notes
+ ///
+ /// Out-of-band (OOB) data also triggers readable events. But must
+ /// application don't actually read OOB data, this could leave an
+ /// application open to a Denial-of-Service (Dos) attack, see
+ /// <https://github.com/sandstorm-io/sandstorm-website/blob/58f93346028c0576e8147627667328eaaf4be9fa/_posts/2015-04-08-osx-security-bug.md>.
+ /// However because Mio uses edge-triggers it will not result in an infinite
+ /// loop as described in the article above.
+ pub fn is_readable(&self) -> bool {
+ sys::event::is_readable(&self.inner)
+ }
+
+ /// Returns true if the event contains writable readiness.
+ pub fn is_writable(&self) -> bool {
+ sys::event::is_writable(&self.inner)
+ }
+
+ /// Returns true if the event contains error readiness.
+ ///
+ /// Error events occur when the socket enters an error state. In this case,
+ /// the socket will also receive a readable or writable event. Reading or
+ /// writing to the socket will result in an error.
+ ///
+ /// # Notes
+ ///
+ /// Method is available on all platforms, but not all platforms trigger the
+ /// error event.
+ ///
+ /// The table below shows what flags are checked on what OS.
+ ///
+ /// | [OS selector] | Flag(s) checked |
+ /// |---------------|-----------------|
+ /// | [epoll] | `EPOLLERR` |
+ /// | [kqueue] | `EV_ERROR` and `EV_EOF` with `fflags` set to `0`. |
+ ///
+ /// [OS selector]: ../struct.Poll.html#implementation-notes
+ /// [epoll]: https://man7.org/linux/man-pages/man7/epoll.7.html
+ /// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+ pub fn is_error(&self) -> bool {
+ sys::event::is_error(&self.inner)
+ }
+
+ /// Returns true if the event contains read closed readiness.
+ ///
+ /// # Notes
+ ///
+ /// Read closed readiness can be expected after any of the following have
+ /// occurred:
+ /// * The local stream has shutdown the read half of its socket
+ /// * The local stream has shutdown both the read half and the write half
+ /// of its socket
+ /// * The peer stream has shutdown the write half its socket; this sends a
+ /// `FIN` packet that has been received by the local stream
+ ///
+ /// Method is a best effort implementation. While some platforms may not
+ /// return readiness when read half is closed, it is guaranteed that
+ /// false-positives will not occur.
+ ///
+ /// The table below shows what flags are checked on what OS.
+ ///
+ /// | [OS selector] | Flag(s) checked |
+ /// |---------------|-----------------|
+ /// | [epoll] | `EPOLLHUP`, or |
+ /// | | `EPOLLIN` and `EPOLLRDHUP` |
+ /// | [kqueue] | `EV_EOF` |
+ ///
+ /// [OS selector]: ../struct.Poll.html#implementation-notes
+ /// [epoll]: https://man7.org/linux/man-pages/man7/epoll.7.html
+ /// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+ pub fn is_read_closed(&self) -> bool {
+ sys::event::is_read_closed(&self.inner)
+ }
+
+ /// Returns true if the event contains write closed readiness.
+ ///
+ /// # Notes
+ ///
+ /// On [epoll] this is essentially a check for `EPOLLHUP` flag as the
+ /// local stream shutting down its write half does not trigger this event.
+ ///
+ /// On [kqueue] the local stream shutting down the write half of its
+ /// socket will trigger this event.
+ ///
+ /// Method is a best effort implementation. While some platforms may not
+ /// return readiness when write half is closed, it is guaranteed that
+ /// false-positives will not occur.
+ ///
+ /// The table below shows what flags are checked on what OS.
+ ///
+ /// | [OS selector] | Flag(s) checked |
+ /// |---------------|-----------------|
+ /// | [epoll] | `EPOLLHUP`, or |
+ /// | | only `EPOLLERR`, or |
+ /// | | `EPOLLOUT` and `EPOLLERR` |
+ /// | [kqueue] | `EV_EOF` |
+ ///
+ /// [OS selector]: ../struct.Poll.html#implementation-notes
+ /// [epoll]: https://man7.org/linux/man-pages/man7/epoll.7.html
+ /// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+ pub fn is_write_closed(&self) -> bool {
+ sys::event::is_write_closed(&self.inner)
+ }
+
+ /// Returns true if the event contains priority readiness.
+ ///
+ /// # Notes
+ ///
+ /// Method is available on all platforms, but not all platforms trigger the
+ /// priority event.
+ ///
+ /// The table below shows what flags are checked on what OS.
+ ///
+ /// | [OS selector] | Flag(s) checked |
+ /// |---------------|-----------------|
+ /// | [epoll] | `EPOLLPRI` |
+ /// | [kqueue] | *Not supported* |
+ ///
+ /// [OS selector]: ../struct.Poll.html#implementation-notes
+ /// [epoll]: https://man7.org/linux/man-pages/man7/epoll.7.html
+ /// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+ #[inline]
+ pub fn is_priority(&self) -> bool {
+ sys::event::is_priority(&self.inner)
+ }
+
+ /// Returns true if the event contains AIO readiness.
+ ///
+ /// # Notes
+ ///
+ /// Method is available on all platforms, but not all platforms support AIO.
+ ///
+ /// The table below shows what flags are checked on what OS.
+ ///
+ /// | [OS selector] | Flag(s) checked |
+ /// |---------------|-----------------|
+ /// | [epoll] | *Not supported* |
+ /// | [kqueue]<sup>1</sup> | `EVFILT_AIO` |
+ ///
+ /// 1: Only supported on DragonFly BSD, FreeBSD, iOS and macOS.
+ ///
+ /// [OS selector]: ../struct.Poll.html#implementation-notes
+ /// [epoll]: https://man7.org/linux/man-pages/man7/epoll.7.html
+ /// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+ pub fn is_aio(&self) -> bool {
+ sys::event::is_aio(&self.inner)
+ }
+
+ /// Returns true if the event contains LIO readiness.
+ ///
+ /// # Notes
+ ///
+ /// Method is available on all platforms, but only FreeBSD supports LIO. On
+ /// FreeBSD this method checks the `EVFILT_LIO` flag.
+ pub fn is_lio(&self) -> bool {
+ sys::event::is_lio(&self.inner)
+ }
+
+ /// Create a reference to an `Event` from a platform specific event.
+ pub(crate) fn from_sys_event_ref(sys_event: &sys::Event) -> &Event {
+ unsafe {
+ // This is safe because the memory layout of `Event` is
+ // the same as `sys::Event` due to the `repr(transparent)` attribute.
+ &*(sys_event as *const sys::Event as *const Event)
+ }
+ }
+}
+
+/// When the [alternate] flag is enabled this will print platform specific
+/// details, for example the fields of the `kevent` structure on platforms that
+/// use `kqueue(2)`. Note however that the output of this implementation is
+/// **not** consider a part of the stable API.
+///
+/// [alternate]: fmt::Formatter::alternate
+impl fmt::Debug for Event {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ let alternate = f.alternate();
+ let mut d = f.debug_struct("Event");
+ d.field("token", &self.token())
+ .field("readable", &self.is_readable())
+ .field("writable", &self.is_writable())
+ .field("error", &self.is_error())
+ .field("read_closed", &self.is_read_closed())
+ .field("write_closed", &self.is_write_closed())
+ .field("priority", &self.is_priority())
+ .field("aio", &self.is_aio())
+ .field("lio", &self.is_lio());
+
+ if alternate {
+ struct EventDetails<'a>(&'a sys::Event);
+
+ impl<'a> fmt::Debug for EventDetails<'a> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ sys::event::debug_details(f, self.0)
+ }
+ }
+
+ d.field("details", &EventDetails(&self.inner)).finish()
+ } else {
+ d.finish()
+ }
+ }
+}
diff --git a/mio/src/event/events.rs b/mio/src/event/events.rs
new file mode 100644
index 0000000..f3c5a2f
--- /dev/null
+++ b/mio/src/event/events.rs
@@ -0,0 +1,230 @@
+use crate::event::Event;
+use crate::sys;
+
+use std::fmt;
+
+/// A collection of readiness events.
+///
+/// `Events` is passed as an argument to [`Poll::poll`] and will be used to
+/// receive any new readiness events received since the last poll. Usually, a
+/// single `Events` instance is created at the same time as a [`Poll`] and
+/// reused on each call to [`Poll::poll`].
+///
+/// See [`Poll`] for more documentation on polling.
+///
+/// [`Poll::poll`]: ../struct.Poll.html#method.poll
+/// [`Poll`]: ../struct.Poll.html
+///
+/// # Examples
+///
+#[cfg_attr(feature = "os-poll", doc = "```")]
+#[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Events, Poll};
+/// use std::time::Duration;
+///
+/// let mut events = Events::with_capacity(1024);
+/// let mut poll = Poll::new()?;
+/// #
+/// # assert!(events.is_empty());
+///
+/// // Register `event::Source`s with `poll`.
+///
+/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+///
+/// for event in events.iter() {
+/// println!("Got an event for {:?}", event.token());
+/// }
+/// # Ok(())
+/// # }
+/// ```
+pub struct Events {
+ inner: sys::Events,
+}
+
+/// [`Events`] iterator.
+///
+/// This struct is created by the [`iter`] method on [`Events`].
+///
+/// [`Events`]: struct.Events.html
+/// [`iter`]: struct.Events.html#method.iter
+///
+/// # Examples
+///
+#[cfg_attr(feature = "os-poll", doc = "```")]
+#[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Events, Poll};
+/// use std::time::Duration;
+///
+/// let mut events = Events::with_capacity(1024);
+/// let mut poll = Poll::new()?;
+///
+/// // Register handles with `poll`.
+///
+/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+///
+/// for event in events.iter() {
+/// println!("Got an event for {:?}", event.token());
+/// }
+/// # Ok(())
+/// # }
+/// ```
+#[derive(Debug, Clone)]
+pub struct Iter<'a> {
+ inner: &'a Events,
+ pos: usize,
+}
+
+impl Events {
+ /// Return a new `Events` capable of holding up to `capacity` events.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use mio::Events;
+ ///
+ /// let events = Events::with_capacity(1024);
+ /// assert_eq!(1024, events.capacity());
+ /// ```
+ pub fn with_capacity(capacity: usize) -> Events {
+ Events {
+ inner: sys::Events::with_capacity(capacity),
+ }
+ }
+
+ /// Returns the number of `Event` values that `self` can hold.
+ ///
+ /// ```
+ /// use mio::Events;
+ ///
+ /// let events = Events::with_capacity(1024);
+ /// assert_eq!(1024, events.capacity());
+ /// ```
+ pub fn capacity(&self) -> usize {
+ self.inner.capacity()
+ }
+
+ /// Returns `true` if `self` contains no `Event` values.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use mio::Events;
+ ///
+ /// let events = Events::with_capacity(1024);
+ /// assert!(events.is_empty());
+ /// ```
+ pub fn is_empty(&self) -> bool {
+ self.inner.is_empty()
+ }
+
+ /// Returns an iterator over the `Event` values.
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(feature = "os-poll", doc = "```")]
+ #[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::{Events, Poll};
+ /// use std::time::Duration;
+ ///
+ /// let mut events = Events::with_capacity(1024);
+ /// let mut poll = Poll::new()?;
+ ///
+ /// // Register handles with `poll`.
+ ///
+ /// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+ ///
+ /// for event in events.iter() {
+ /// println!("Got an event for {:?}", event.token());
+ /// }
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn iter(&self) -> Iter<'_> {
+ Iter {
+ inner: self,
+ pos: 0,
+ }
+ }
+
+ /// Clearing all `Event` values from container explicitly.
+ ///
+ /// # Notes
+ ///
+ /// Events are cleared before every `poll`, so it is not required to call
+ /// this manually.
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(feature = "os-poll", doc = "```")]
+ #[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::{Events, Poll};
+ /// use std::time::Duration;
+ ///
+ /// let mut events = Events::with_capacity(1024);
+ /// let mut poll = Poll::new()?;
+ ///
+ /// // Register handles with `poll`.
+ ///
+ /// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+ ///
+ /// // Clear all events.
+ /// events.clear();
+ /// assert!(events.is_empty());
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn clear(&mut self) {
+ self.inner.clear();
+ }
+
+ /// Returns the inner `sys::Events`.
+ pub(crate) fn sys(&mut self) -> &mut sys::Events {
+ &mut self.inner
+ }
+}
+
+impl<'a> IntoIterator for &'a Events {
+ type Item = &'a Event;
+ type IntoIter = Iter<'a>;
+
+ fn into_iter(self) -> Self::IntoIter {
+ self.iter()
+ }
+}
+
+impl<'a> Iterator for Iter<'a> {
+ type Item = &'a Event;
+
+ fn next(&mut self) -> Option<Self::Item> {
+ let ret = self
+ .inner
+ .inner
+ .get(self.pos)
+ .map(Event::from_sys_event_ref);
+ self.pos += 1;
+ ret
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ let size = self.inner.inner.len();
+ (size, Some(size))
+ }
+
+ fn count(self) -> usize {
+ self.inner.inner.len()
+ }
+}
+
+impl fmt::Debug for Events {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ f.debug_list().entries(self).finish()
+ }
+}
diff --git a/mio/src/event/mod.rs b/mio/src/event/mod.rs
new file mode 100644
index 0000000..8e17f82
--- /dev/null
+++ b/mio/src/event/mod.rs
@@ -0,0 +1,10 @@
+//! Readiness event types and utilities.
+
+#[allow(clippy::module_inception)]
+mod event;
+mod events;
+mod source;
+
+pub use self::event::Event;
+pub use self::events::{Events, Iter};
+pub use self::source::Source;
diff --git a/mio/src/event/source.rs b/mio/src/event/source.rs
new file mode 100644
index 0000000..619f72d
--- /dev/null
+++ b/mio/src/event/source.rs
@@ -0,0 +1,139 @@
+use crate::{Interest, Registry, Token};
+
+use std::io;
+
+/// An event source that may be registered with [`Registry`].
+///
+/// Types that implement `event::Source` can be registered with
+/// `Registry`. Users of Mio **should not** use the `event::Source` trait
+/// functions directly. Instead, the equivalent functions on `Registry` should
+/// be used.
+///
+/// See [`Registry`] for more details.
+///
+/// [`Registry`]: ../struct.Registry.html
+///
+/// # Implementing `event::Source`
+///
+/// Event sources are always backed by system handles, such as sockets or other
+/// system handles. These `event::Source`s will be monitored by the system
+/// selector. An implementation of `Source` will almost always delegates to a
+/// lower level handle. Examples of this are [`TcpStream`]s, or the *unix only*
+/// [`SourceFd`].
+///
+/// [`TcpStream`]: ../net/struct.TcpStream.html
+/// [`SourceFd`]: ../unix/struct.SourceFd.html
+///
+/// # Dropping `event::Source`s
+///
+/// All `event::Source`s, unless otherwise specified, need to be [deregistered]
+/// before being dropped for them to not leak resources. This goes against the
+/// normal drop behaviour of types in Rust which cleanup after themselves, e.g.
+/// a `File` will close itself. However since deregistering needs access to
+/// [`Registry`] this cannot be done while being dropped.
+///
+/// [deregistered]: ../struct.Registry.html#method.deregister
+///
+/// # Examples
+///
+/// Implementing `Source` on a struct containing a socket:
+///
+#[cfg_attr(all(feature = "os-poll", feature = "net"), doc = "```")]
+#[cfg_attr(not(all(feature = "os-poll", feature = "net")), doc = "```ignore")]
+/// use mio::{Interest, Registry, Token};
+/// use mio::event::Source;
+/// use mio::net::TcpStream;
+///
+/// use std::io;
+///
+/// # #[allow(dead_code)]
+/// pub struct MySource {
+/// socket: TcpStream,
+/// }
+///
+/// impl Source for MySource {
+/// fn register(&mut self, registry: &Registry, token: Token, interests: Interest)
+/// -> io::Result<()>
+/// {
+/// // Delegate the `register` call to `socket`
+/// self.socket.register(registry, token, interests)
+/// }
+///
+/// fn reregister(&mut self, registry: &Registry, token: Token, interests: Interest)
+/// -> io::Result<()>
+/// {
+/// // Delegate the `reregister` call to `socket`
+/// self.socket.reregister(registry, token, interests)
+/// }
+///
+/// fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+/// // Delegate the `deregister` call to `socket`
+/// self.socket.deregister(registry)
+/// }
+/// }
+/// ```
+pub trait Source {
+ /// Register `self` with the given `Registry` instance.
+ ///
+ /// This function should not be called directly. Use [`Registry::register`]
+ /// instead. Implementors should handle registration by delegating the call
+ /// to another `Source` type.
+ ///
+ /// [`Registry::register`]: ../struct.Registry.html#method.register
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()>;
+
+ /// Re-register `self` with the given `Registry` instance.
+ ///
+ /// This function should not be called directly. Use
+ /// [`Registry::reregister`] instead. Implementors should handle
+ /// re-registration by either delegating the call to another `Source` type.
+ ///
+ /// [`Registry::reregister`]: ../struct.Registry.html#method.reregister
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()>;
+
+ /// Deregister `self` from the given `Registry` instance.
+ ///
+ /// This function should not be called directly. Use
+ /// [`Registry::deregister`] instead. Implementors should handle
+ /// deregistration by delegating the call to another `Source` type.
+ ///
+ /// [`Registry::deregister`]: ../struct.Registry.html#method.deregister
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()>;
+}
+
+impl<T> Source for Box<T>
+where
+ T: Source + ?Sized,
+{
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ (**self).register(registry, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ (**self).reregister(registry, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ (**self).deregister(registry)
+ }
+}
diff --git a/mio/src/interest.rs b/mio/src/interest.rs
new file mode 100644
index 0000000..06b1632
--- /dev/null
+++ b/mio/src/interest.rs
@@ -0,0 +1,193 @@
+use std::num::NonZeroU8;
+use std::{fmt, ops};
+
+/// Interest used in registering.
+///
+/// Interest are used in [registering] [`event::Source`]s with [`Poll`], they
+/// indicate what readiness should be monitored for. For example if a socket is
+/// registered with [readable] interests and the socket becomes writable, no
+/// event will be returned from a call to [`poll`].
+///
+/// [registering]: struct.Registry.html#method.register
+/// [`event::Source`]: ./event/trait.Source.html
+/// [`Poll`]: struct.Poll.html
+/// [readable]: struct.Interest.html#associatedconstant.READABLE
+/// [`poll`]: struct.Poll.html#method.poll
+#[derive(Copy, PartialEq, Eq, Clone, PartialOrd, Ord)]
+pub struct Interest(NonZeroU8);
+
+// These must be unique.
+const READABLE: u8 = 0b0001;
+const WRITABLE: u8 = 0b0010;
+// The following are not available on all platforms.
+const AIO: u8 = 0b0100;
+const LIO: u8 = 0b1000;
+const PRIORITY: u8 = 0b10000;
+
+impl Interest {
+ /// Returns a `Interest` set representing readable interests.
+ pub const READABLE: Interest = Interest(unsafe { NonZeroU8::new_unchecked(READABLE) });
+
+ /// Returns a `Interest` set representing writable interests.
+ pub const WRITABLE: Interest = Interest(unsafe { NonZeroU8::new_unchecked(WRITABLE) });
+
+ /// Returns a `Interest` set representing AIO completion interests.
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ pub const AIO: Interest = Interest(unsafe { NonZeroU8::new_unchecked(AIO) });
+
+ /// Returns a `Interest` set representing LIO completion interests.
+ #[cfg(target_os = "freebsd")]
+ pub const LIO: Interest = Interest(unsafe { NonZeroU8::new_unchecked(LIO) });
+
+ /// Returns a `Interest` set representing priority completion interests.
+ #[cfg(any(target_os = "linux", target_os = "android"))]
+ pub const PRIORITY: Interest = Interest(unsafe { NonZeroU8::new_unchecked(PRIORITY) });
+
+ /// Add together two `Interest`.
+ ///
+ /// This does the same thing as the `BitOr` implementation, but is a
+ /// constant function.
+ ///
+ /// ```
+ /// use mio::Interest;
+ ///
+ /// const INTERESTS: Interest = Interest::READABLE.add(Interest::WRITABLE);
+ /// # fn silent_dead_code_warning(_: Interest) { }
+ /// # silent_dead_code_warning(INTERESTS)
+ /// ```
+ #[allow(clippy::should_implement_trait)]
+ pub const fn add(self, other: Interest) -> Interest {
+ Interest(unsafe { NonZeroU8::new_unchecked(self.0.get() | other.0.get()) })
+ }
+
+ /// Removes `other` `Interest` from `self`.
+ ///
+ /// Returns `None` if the set would be empty after removing `other`.
+ ///
+ /// ```
+ /// use mio::Interest;
+ ///
+ /// const RW_INTERESTS: Interest = Interest::READABLE.add(Interest::WRITABLE);
+ ///
+ /// // As long a one interest remain this will return `Some`.
+ /// let w_interest = RW_INTERESTS.remove(Interest::READABLE).unwrap();
+ /// assert!(!w_interest.is_readable());
+ /// assert!(w_interest.is_writable());
+ ///
+ /// // Removing all interests from the set will return `None`.
+ /// assert_eq!(w_interest.remove(Interest::WRITABLE), None);
+ ///
+ /// // Its also possible to remove multiple interests at once.
+ /// assert_eq!(RW_INTERESTS.remove(RW_INTERESTS), None);
+ /// ```
+ pub fn remove(self, other: Interest) -> Option<Interest> {
+ NonZeroU8::new(self.0.get() & !other.0.get()).map(Interest)
+ }
+
+ /// Returns true if the value includes readable readiness.
+ pub const fn is_readable(self) -> bool {
+ (self.0.get() & READABLE) != 0
+ }
+
+ /// Returns true if the value includes writable readiness.
+ pub const fn is_writable(self) -> bool {
+ (self.0.get() & WRITABLE) != 0
+ }
+
+ /// Returns true if `Interest` contains AIO readiness.
+ pub const fn is_aio(self) -> bool {
+ (self.0.get() & AIO) != 0
+ }
+
+ /// Returns true if `Interest` contains LIO readiness.
+ pub const fn is_lio(self) -> bool {
+ (self.0.get() & LIO) != 0
+ }
+
+ /// Returns true if `Interest` contains priority readiness.
+ pub const fn is_priority(self) -> bool {
+ (self.0.get() & PRIORITY) != 0
+ }
+}
+
+impl ops::BitOr for Interest {
+ type Output = Self;
+
+ #[inline]
+ fn bitor(self, other: Self) -> Self {
+ self.add(other)
+ }
+}
+
+impl ops::BitOrAssign for Interest {
+ #[inline]
+ fn bitor_assign(&mut self, other: Self) {
+ self.0 = (*self | other).0;
+ }
+}
+
+impl fmt::Debug for Interest {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ let mut one = false;
+ if self.is_readable() {
+ if one {
+ write!(fmt, " | ")?
+ }
+ write!(fmt, "READABLE")?;
+ one = true
+ }
+ if self.is_writable() {
+ if one {
+ write!(fmt, " | ")?
+ }
+ write!(fmt, "WRITABLE")?;
+ one = true
+ }
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ {
+ if self.is_aio() {
+ if one {
+ write!(fmt, " | ")?
+ }
+ write!(fmt, "AIO")?;
+ one = true
+ }
+ }
+ #[cfg(any(target_os = "freebsd"))]
+ {
+ if self.is_lio() {
+ if one {
+ write!(fmt, " | ")?
+ }
+ write!(fmt, "LIO")?;
+ one = true
+ }
+ }
+ #[cfg(any(target_os = "linux", target_os = "android"))]
+ {
+ if self.is_priority() {
+ if one {
+ write!(fmt, " | ")?
+ }
+ write!(fmt, "PRIORITY")?;
+ one = true
+ }
+ }
+ debug_assert!(one, "printing empty interests");
+ Ok(())
+ }
+}
diff --git a/mio/src/io_source.rs b/mio/src/io_source.rs
new file mode 100644
index 0000000..99623c1
--- /dev/null
+++ b/mio/src/io_source.rs
@@ -0,0 +1,334 @@
+use std::ops::{Deref, DerefMut};
+#[cfg(unix)]
+use std::os::unix::io::AsRawFd;
+#[cfg(target_os = "wasi")]
+use std::os::wasi::io::AsRawFd;
+#[cfg(windows)]
+use std::os::windows::io::AsRawSocket;
+#[cfg(debug_assertions)]
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::{fmt, io};
+
+use crate::sys::IoSourceState;
+use crate::{event, Interest, Registry, Token};
+
+/// Adapter for a [`RawFd`] or [`RawSocket`] providing an [`event::Source`]
+/// implementation.
+///
+/// `IoSource` enables registering any FD or socket wrapper with [`Poll`].
+///
+/// While only implementations for TCP, UDP, and UDS (Unix only) are provided,
+/// Mio supports registering any FD or socket that can be registered with the
+/// underlying OS selector. `IoSource` provides the necessary bridge.
+///
+/// [`RawFd`]: std::os::unix::io::RawFd
+/// [`RawSocket`]: std::os::windows::io::RawSocket
+///
+/// # Notes
+///
+/// To handle the registrations and events properly **all** I/O operations (such
+/// as `read`, `write`, etc.) must go through the [`do_io`] method to ensure the
+/// internal state is updated accordingly.
+///
+/// [`Poll`]: crate::Poll
+/// [`do_io`]: IoSource::do_io
+/*
+///
+/// # Examples
+///
+/// Basic usage.
+///
+/// ```
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Interest, Poll, Token};
+/// use mio::IoSource;
+///
+/// use std::net;
+///
+/// let poll = Poll::new()?;
+///
+/// // Bind a std TCP listener.
+/// let listener = net::TcpListener::bind("127.0.0.1:0")?;
+/// // Wrap it in the `IoSource` type.
+/// let mut listener = IoSource::new(listener);
+///
+/// // Register the listener.
+/// poll.registry().register(&mut listener, Token(0), Interest::READABLE)?;
+/// # Ok(())
+/// # }
+/// ```
+*/
+pub struct IoSource<T> {
+ state: IoSourceState,
+ inner: T,
+ #[cfg(debug_assertions)]
+ selector_id: SelectorId,
+}
+
+impl<T> IoSource<T> {
+ /// Create a new `IoSource`.
+ pub fn new(io: T) -> IoSource<T> {
+ IoSource {
+ state: IoSourceState::new(),
+ inner: io,
+ #[cfg(debug_assertions)]
+ selector_id: SelectorId::new(),
+ }
+ }
+
+ /// Execute an I/O operations ensuring that the socket receives more events
+ /// if it hits a [`WouldBlock`] error.
+ ///
+ /// # Notes
+ ///
+ /// This method is required to be called for **all** I/O operations to
+ /// ensure the user will receive events once the socket is ready again after
+ /// returning a [`WouldBlock`] error.
+ ///
+ /// [`WouldBlock`]: io::ErrorKind::WouldBlock
+ pub fn do_io<F, R>(&self, f: F) -> io::Result<R>
+ where
+ F: FnOnce(&T) -> io::Result<R>,
+ {
+ self.state.do_io(f, &self.inner)
+ }
+
+ /// Returns the I/O source, dropping the state.
+ ///
+ /// # Notes
+ ///
+ /// To ensure no more events are to be received for this I/O source first
+ /// [`deregister`] it.
+ ///
+ /// [`deregister`]: Registry::deregister
+ pub fn into_inner(self) -> T {
+ self.inner
+ }
+}
+
+/// Be careful when using this method. All I/O operations that may block must go
+/// through the [`do_io`] method.
+///
+/// [`do_io`]: IoSource::do_io
+impl<T> Deref for IoSource<T> {
+ type Target = T;
+
+ fn deref(&self) -> &Self::Target {
+ &self.inner
+ }
+}
+
+/// Be careful when using this method. All I/O operations that may block must go
+/// through the [`do_io`] method.
+///
+/// [`do_io`]: IoSource::do_io
+impl<T> DerefMut for IoSource<T> {
+ fn deref_mut(&mut self) -> &mut Self::Target {
+ &mut self.inner
+ }
+}
+
+#[cfg(unix)]
+impl<T> event::Source for IoSource<T>
+where
+ T: AsRawFd,
+{
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ #[cfg(debug_assertions)]
+ self.selector_id.associate(registry)?;
+ registry
+ .selector()
+ .register(self.inner.as_raw_fd(), token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ #[cfg(debug_assertions)]
+ self.selector_id.check_association(registry)?;
+ registry
+ .selector()
+ .reregister(self.inner.as_raw_fd(), token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ #[cfg(debug_assertions)]
+ self.selector_id.remove_association(registry)?;
+ registry.selector().deregister(self.inner.as_raw_fd())
+ }
+}
+
+#[cfg(windows)]
+impl<T> event::Source for IoSource<T>
+where
+ T: AsRawSocket,
+{
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ #[cfg(debug_assertions)]
+ self.selector_id.associate(registry)?;
+ self.state
+ .register(registry, token, interests, self.inner.as_raw_socket())
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ #[cfg(debug_assertions)]
+ self.selector_id.check_association(registry)?;
+ self.state.reregister(registry, token, interests)
+ }
+
+ fn deregister(&mut self, _registry: &Registry) -> io::Result<()> {
+ #[cfg(debug_assertions)]
+ self.selector_id.remove_association(_registry)?;
+ self.state.deregister()
+ }
+}
+
+#[cfg(target_os = "wasi")]
+impl<T> event::Source for IoSource<T>
+where
+ T: AsRawFd,
+{
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ #[cfg(debug_assertions)]
+ self.selector_id.associate(registry)?;
+ registry
+ .selector()
+ .register(self.inner.as_raw_fd() as _, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ #[cfg(debug_assertions)]
+ self.selector_id.check_association(registry)?;
+ registry
+ .selector()
+ .reregister(self.inner.as_raw_fd() as _, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ #[cfg(debug_assertions)]
+ self.selector_id.remove_association(registry)?;
+ registry.selector().deregister(self.inner.as_raw_fd() as _)
+ }
+}
+
+impl<T> fmt::Debug for IoSource<T>
+where
+ T: fmt::Debug,
+{
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ self.inner.fmt(f)
+ }
+}
+
+/// Used to associate an `IoSource` with a `sys::Selector`.
+#[cfg(debug_assertions)]
+#[derive(Debug)]
+struct SelectorId {
+ id: AtomicUsize,
+}
+
+#[cfg(debug_assertions)]
+impl SelectorId {
+ /// Value of `id` if `SelectorId` is not associated with any
+ /// `sys::Selector`. Valid selector ids start at 1.
+ const UNASSOCIATED: usize = 0;
+
+ /// Create a new `SelectorId`.
+ const fn new() -> SelectorId {
+ SelectorId {
+ id: AtomicUsize::new(Self::UNASSOCIATED),
+ }
+ }
+
+ /// Associate an I/O source with `registry`, returning an error if its
+ /// already registered.
+ fn associate(&self, registry: &Registry) -> io::Result<()> {
+ let registry_id = registry.selector().id();
+ let previous_id = self.id.swap(registry_id, Ordering::AcqRel);
+
+ if previous_id == Self::UNASSOCIATED {
+ Ok(())
+ } else {
+ Err(io::Error::new(
+ io::ErrorKind::AlreadyExists,
+ "I/O source already registered with a `Registry`",
+ ))
+ }
+ }
+
+ /// Check the association of an I/O source with `registry`, returning an
+ /// error if its registered with a different `Registry` or not registered at
+ /// all.
+ fn check_association(&self, registry: &Registry) -> io::Result<()> {
+ let registry_id = registry.selector().id();
+ let id = self.id.load(Ordering::Acquire);
+
+ if id == registry_id {
+ Ok(())
+ } else if id == Self::UNASSOCIATED {
+ Err(io::Error::new(
+ io::ErrorKind::NotFound,
+ "I/O source not registered with `Registry`",
+ ))
+ } else {
+ Err(io::Error::new(
+ io::ErrorKind::AlreadyExists,
+ "I/O source already registered with a different `Registry`",
+ ))
+ }
+ }
+
+ /// Remove a previously made association from `registry`, returns an error
+ /// if it was not previously associated with `registry`.
+ fn remove_association(&self, registry: &Registry) -> io::Result<()> {
+ let registry_id = registry.selector().id();
+ let previous_id = self.id.swap(Self::UNASSOCIATED, Ordering::AcqRel);
+
+ if previous_id == registry_id {
+ Ok(())
+ } else {
+ Err(io::Error::new(
+ io::ErrorKind::NotFound,
+ "I/O source not registered with `Registry`",
+ ))
+ }
+ }
+}
+
+#[cfg(debug_assertions)]
+impl Clone for SelectorId {
+ fn clone(&self) -> SelectorId {
+ SelectorId {
+ id: AtomicUsize::new(self.id.load(Ordering::Acquire)),
+ }
+ }
+}
diff --git a/mio/src/lib.rs b/mio/src/lib.rs
new file mode 100644
index 0000000..c3d50ad
--- /dev/null
+++ b/mio/src/lib.rs
@@ -0,0 +1,266 @@
+#![deny(
+ missing_docs,
+ missing_debug_implementations,
+ rust_2018_idioms,
+ unused_imports,
+ dead_code
+)]
+#![cfg_attr(docsrs, feature(doc_cfg))]
+// Disallow warnings when running tests.
+#![cfg_attr(test, deny(warnings))]
+// Disallow warnings in examples.
+#![doc(test(attr(deny(warnings))))]
+
+//! Mio is a fast, low-level I/O library for Rust focusing on non-blocking APIs
+//! and event notification for building high performance I/O apps with as little
+//! overhead as possible over the OS abstractions.
+//!
+//! # Usage
+//!
+//! Using Mio starts by creating a [`Poll`], which reads events from the OS and
+//! puts them into [`Events`]. You can handle I/O events from the OS with it.
+//!
+//! For more detail, see [`Poll`].
+//!
+//! [`Poll`]: ../mio/struct.Poll.html
+//! [`Events`]: ../mio/event/struct.Events.html
+//!
+//! ## Examples
+//!
+//! Examples can found in the `examples` directory of the source code, or [on
+//! GitHub].
+//!
+//! [on GitHub]: https://github.com/tokio-rs/mio/tree/master/examples
+//!
+//! ## Guide
+//!
+//! A getting started guide is available in the [`guide`] module.
+//!
+//! ## Available features
+//!
+//! The available features are described in the [`features`] module.
+
+// macros used internally
+#[macro_use]
+mod macros;
+
+mod interest;
+mod poll;
+mod sys;
+mod token;
+#[cfg(not(target_os = "wasi"))]
+mod waker;
+
+pub mod event;
+
+cfg_io_source! {
+ mod io_source;
+}
+
+cfg_net! {
+ pub mod net;
+}
+
+#[doc(no_inline)]
+pub use event::Events;
+pub use interest::Interest;
+pub use poll::{Poll, Registry};
+pub use token::Token;
+#[cfg(not(target_os = "wasi"))]
+pub use waker::Waker;
+
+#[cfg(all(unix, feature = "os-ext"))]
+#[cfg_attr(docsrs, doc(cfg(all(unix, feature = "os-ext"))))]
+pub mod unix {
+ //! Unix only extensions.
+ #[cfg(not(target_vendor = "teaclave"))]
+ pub mod pipe {
+ //! Unix pipe.
+ //!
+ //! See the [`new`] function for documentation.
+
+ pub use crate::sys::pipe::{new, Receiver, Sender};
+ }
+
+ pub use crate::sys::SourceFd;
+}
+
+#[cfg(all(windows, feature = "os-ext"))]
+#[cfg_attr(docsrs, doc(cfg(all(windows, feature = "os-ext"))))]
+pub mod windows {
+ //! Windows only extensions.
+
+ pub use crate::sys::named_pipe::NamedPipe;
+}
+
+pub mod features {
+ //! # Mio's optional features.
+ //!
+ //! This document describes the available features in Mio.
+ //!
+ #![cfg_attr(feature = "os-poll", doc = "## `os-poll` (enabled)")]
+ #![cfg_attr(not(feature = "os-poll"), doc = "## `os-poll` (disabled)")]
+ //!
+ //! Mio by default provides only a shell implementation that `panic!`s the
+ //! moment it is actually run. To run it requires OS support, this is
+ //! enabled by activating the `os-poll` feature.
+ //!
+ //! This makes `Poll`, `Registry` and `Waker` functional.
+ //!
+ #![cfg_attr(feature = "os-ext", doc = "## `os-ext` (enabled)")]
+ #![cfg_attr(not(feature = "os-ext"), doc = "## `os-ext` (disabled)")]
+ //!
+ //! `os-ext` enables additional OS specific facilities. These facilities can
+ //! be found in the `unix` and `windows` module.
+ //!
+ #![cfg_attr(feature = "net", doc = "## Network types (enabled)")]
+ #![cfg_attr(not(feature = "net"), doc = "## Network types (disabled)")]
+ //!
+ //! The `net` feature enables networking primitives in the `net` module.
+}
+
+pub mod guide {
+ //! # Getting started guide.
+ //!
+ //! In this guide we'll do the following:
+ //!
+ //! 1. Create a [`Poll`] instance (and learn what it is).
+ //! 2. Register an [event source].
+ //! 3. Create an event loop.
+ //!
+ //! At the end you'll have a very small (but quick) TCP server that accepts
+ //! connections and then drops (disconnects) them.
+ //!
+ //! ## 1. Creating a `Poll` instance
+ //!
+ //! Using Mio starts by creating a [`Poll`] instance, which monitors events
+ //! from the OS and puts them into [`Events`]. This allows us to execute I/O
+ //! operations based on what operations are ready.
+ //!
+ //! [`Poll`]: ../struct.Poll.html
+ //! [`Events`]: ../event/struct.Events.html
+ //!
+ #![cfg_attr(feature = "os-poll", doc = "```")]
+ #![cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+ //! # use mio::{Poll, Events};
+ //! # fn main() -> std::io::Result<()> {
+ //! // `Poll` allows for polling of readiness events.
+ //! let poll = Poll::new()?;
+ //! // `Events` is collection of readiness `Event`s and can be filled by
+ //! // calling `Poll::poll`.
+ //! let events = Events::with_capacity(128);
+ //! # drop((poll, events));
+ //! # Ok(())
+ //! # }
+ //! ```
+ //!
+ //! For example if we're using a [`TcpListener`], we'll only want to
+ //! attempt to accept an incoming connection *iff* any connections are
+ //! queued and ready to be accepted. We don't want to waste our time if no
+ //! connections are ready.
+ //!
+ //! [`TcpListener`]: ../net/struct.TcpListener.html
+ //!
+ //! ## 2. Registering event source
+ //!
+ //! After we've created a [`Poll`] instance that monitors events from the OS
+ //! for us, we need to provide it with a source of events. This is done by
+ //! registering an [event source]. As the name “event source” suggests it is
+ //! a source of events which can be polled using a `Poll` instance. On Unix
+ //! systems this is usually a file descriptor, or a socket/handle on
+ //! Windows.
+ //!
+ //! In the example below we'll use a [`TcpListener`] for which we'll receive
+ //! an event (from [`Poll`]) once a connection is ready to be accepted.
+ //!
+ //! [event source]: ../event/trait.Source.html
+ //!
+ #![cfg_attr(all(feature = "os-poll", feature = "net"), doc = "```")]
+ #![cfg_attr(not(all(feature = "os-poll", feature = "net")), doc = "```ignore")]
+ //! # use mio::net::TcpListener;
+ //! # use mio::{Poll, Token, Interest};
+ //! # fn main() -> std::io::Result<()> {
+ //! # let poll = Poll::new()?;
+ //! # let address = "127.0.0.1:0".parse().unwrap();
+ //! // Create a `TcpListener`, binding it to `address`.
+ //! let mut listener = TcpListener::bind(address)?;
+ //!
+ //! // Next we register it with `Poll` to receive events for it. The `SERVER`
+ //! // `Token` is used to determine that we received an event for the listener
+ //! // later on.
+ //! const SERVER: Token = Token(0);
+ //! poll.registry().register(&mut listener, SERVER, Interest::READABLE)?;
+ //! # Ok(())
+ //! # }
+ //! ```
+ //!
+ //! Multiple event sources can be [registered] (concurrently), so we can
+ //! monitor multiple sources at a time.
+ //!
+ //! [registered]: ../struct.Registry.html#method.register
+ //!
+ //! ## 3. Creating the event loop
+ //!
+ //! After we've created a [`Poll`] instance and registered one or more
+ //! [event sources] with it, we can [poll] it for events. Polling for events
+ //! is simple, we need a container to store the events: [`Events`] and need
+ //! to do something based on the polled events (this part is up to you, we
+ //! can't do it all!). If we do this in a loop we've got ourselves an event
+ //! loop.
+ //!
+ //! The example below shows the event loop in action, completing our small
+ //! TCP server.
+ //!
+ //! [poll]: ../struct.Poll.html#method.poll
+ //! [event sources]: ../event/trait.Source.html
+ //!
+ #![cfg_attr(all(feature = "os-poll", feature = "net"), doc = "```")]
+ #![cfg_attr(not(all(feature = "os-poll", feature = "net")), doc = "```ignore")]
+ //! # use std::io;
+ //! # use std::time::Duration;
+ //! # use mio::net::TcpListener;
+ //! # use mio::{Poll, Token, Interest, Events};
+ //! # fn main() -> io::Result<()> {
+ //! # let mut poll = Poll::new()?;
+ //! # let mut events = Events::with_capacity(128);
+ //! # let address = "127.0.0.1:0".parse().unwrap();
+ //! # let mut listener = TcpListener::bind(address)?;
+ //! # const SERVER: Token = Token(0);
+ //! # poll.registry().register(&mut listener, SERVER, Interest::READABLE)?;
+ //! // Start our event loop.
+ //! loop {
+ //! // Poll the OS for events, waiting at most 100 milliseconds.
+ //! poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+ //!
+ //! // Process each event.
+ //! for event in events.iter() {
+ //! // We can use the token we previously provided to `register` to
+ //! // determine for which type the event is.
+ //! match event.token() {
+ //! SERVER => loop {
+ //! // One or more connections are ready, so we'll attempt to
+ //! // accept them (in a loop).
+ //! match listener.accept() {
+ //! Ok((connection, address)) => {
+ //! println!("Got a connection from: {}", address);
+ //! # drop(connection);
+ //! },
+ //! // A "would block error" is returned if the operation
+ //! // is not ready, so we'll stop trying to accept
+ //! // connections.
+ //! Err(ref err) if would_block(err) => break,
+ //! Err(err) => return Err(err),
+ //! }
+ //! }
+ //! # _ => unreachable!(),
+ //! }
+ //! }
+ //! # return Ok(());
+ //! }
+ //!
+ //! fn would_block(err: &io::Error) -> bool {
+ //! err.kind() == io::ErrorKind::WouldBlock
+ //! }
+ //! # }
+ //! ```
+}
diff --git a/mio/src/macros.rs b/mio/src/macros.rs
new file mode 100644
index 0000000..f97f909
--- /dev/null
+++ b/mio/src/macros.rs
@@ -0,0 +1,70 @@
+//! Macros to ease conditional code based on enabled features.
+
+// Depending on the features not all macros are used.
+#![allow(unused_macros)]
+
+/// The `os-poll` feature is enabled.
+macro_rules! cfg_os_poll {
+ ($($item:item)*) => {
+ $(
+ #[cfg(feature = "os-poll")]
+ #[cfg_attr(docsrs, doc(cfg(feature = "os-poll")))]
+ $item
+ )*
+ }
+}
+
+/// The `os-poll` feature is disabled.
+macro_rules! cfg_not_os_poll {
+ ($($item:item)*) => {
+ $(
+ #[cfg(not(feature = "os-poll"))]
+ $item
+ )*
+ }
+}
+
+/// The `os-ext` feature is enabled.
+macro_rules! cfg_os_ext {
+ ($($item:item)*) => {
+ $(
+ #[cfg(feature = "os-ext")]
+ #[cfg_attr(docsrs, doc(cfg(feature = "os-ext")))]
+ $item
+ )*
+ }
+}
+
+/// The `net` feature is enabled.
+macro_rules! cfg_net {
+ ($($item:item)*) => {
+ $(
+ #[cfg(feature = "net")]
+ #[cfg_attr(docsrs, doc(cfg(feature = "net")))]
+ $item
+ )*
+ }
+}
+
+/// One of the features enabled that needs `IoSource`. That is `net` or `os-ext`
+/// on Unix (for `pipe`).
+macro_rules! cfg_io_source {
+ ($($item:item)*) => {
+ $(
+ #[cfg(any(feature = "net", all(unix, feature = "os-ext")))]
+ #[cfg_attr(docsrs, doc(cfg(any(feature = "net", all(unix, feature = "os-ext")))))]
+ $item
+ )*
+ }
+}
+
+/// The `os-ext` feature is enabled, or one of the features that need `os-ext`.
+macro_rules! cfg_any_os_ext {
+ ($($item:item)*) => {
+ $(
+ #[cfg(any(feature = "os-ext", feature = "net"))]
+ #[cfg_attr(docsrs, doc(cfg(any(feature = "os-ext", feature = "net"))))]
+ $item
+ )*
+ }
+}
diff --git a/mio/src/net/mod.rs b/mio/src/net/mod.rs
new file mode 100644
index 0000000..7d714ca
--- /dev/null
+++ b/mio/src/net/mod.rs
@@ -0,0 +1,39 @@
+//! Networking primitives.
+//!
+//! The types provided in this module are non-blocking by default and are
+//! designed to be portable across all supported Mio platforms. As long as the
+//! [portability guidelines] are followed, the behavior should be identical no
+//! matter the target platform.
+//!
+//! [portability guidelines]: ../struct.Poll.html#portability
+//!
+//! # Notes
+//!
+//! When using a datagram based socket, i.e. [`UdpSocket`] or [`UnixDatagram`],
+//! its only possible to receive a packet once. This means that if you provide a
+//! buffer that is too small you won't be able to receive the data anymore. How
+//! OSs deal with this situation is different for each OS:
+//! * Unixes, such as Linux, FreeBSD and macOS, will simply fill the buffer and
+//! return the amount of bytes written. This means that if the returned value
+//! is equal to the size of the buffer it may have only written a part of the
+//! packet (or the packet has the same size as the buffer).
+//! * Windows returns an `WSAEMSGSIZE` error.
+//!
+//! Mio does not change the value (either ok or error) returned by the OS, it's
+//! up to the user handle this. How to deal with these difference is still up
+//! for debate, specifically in
+//! <https://github.com/rust-lang/rust/issues/55794>. The best advice we can
+//! give is to always call receive with a large enough buffer.
+
+mod tcp;
+pub use self::tcp::{TcpListener, TcpStream};
+
+#[cfg(not(target_os = "wasi"))]
+mod udp;
+#[cfg(not(target_os = "wasi"))]
+pub use self::udp::UdpSocket;
+
+#[cfg(unix)]
+mod uds;
+#[cfg(unix)]
+pub use self::uds::{SocketAddr, UnixDatagram, UnixListener, UnixStream};
diff --git a/mio/src/net/tcp/listener.rs b/mio/src/net/tcp/listener.rs
new file mode 100644
index 0000000..df51d57
--- /dev/null
+++ b/mio/src/net/tcp/listener.rs
@@ -0,0 +1,248 @@
+use std::net::{self, SocketAddr};
+#[cfg(unix)]
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+#[cfg(target_os = "wasi")]
+use std::os::wasi::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+#[cfg(windows)]
+use std::os::windows::io::{AsRawSocket, FromRawSocket, IntoRawSocket, RawSocket};
+use std::{fmt, io};
+
+use crate::io_source::IoSource;
+use crate::net::TcpStream;
+#[cfg(unix)]
+use crate::sys::tcp::set_reuseaddr;
+#[cfg(not(target_os = "wasi"))]
+use crate::sys::tcp::{bind, listen, new_for_addr};
+use crate::{event, sys, Interest, Registry, Token};
+
+/// A structure representing a socket server
+///
+/// # Examples
+///
+#[cfg_attr(feature = "os-poll", doc = "```")]
+#[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Events, Interest, Poll, Token};
+/// use mio::net::TcpListener;
+/// use std::time::Duration;
+///
+/// let mut listener = TcpListener::bind("127.0.0.1:34255".parse()?)?;
+///
+/// let mut poll = Poll::new()?;
+/// let mut events = Events::with_capacity(128);
+///
+/// // Register the socket with `Poll`
+/// poll.registry().register(&mut listener, Token(0), Interest::READABLE)?;
+///
+/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+///
+/// // There may be a socket ready to be accepted
+/// # Ok(())
+/// # }
+/// ```
+pub struct TcpListener {
+ inner: IoSource<net::TcpListener>,
+}
+
+impl TcpListener {
+ /// Convenience method to bind a new TCP listener to the specified address
+ /// to receive new connections.
+ ///
+ /// This function will take the following steps:
+ ///
+ /// 1. Create a new TCP socket.
+ /// 2. Set the `SO_REUSEADDR` option on the socket on Unix.
+ /// 3. Bind the socket to the specified address.
+ /// 4. Calls `listen` on the socket to prepare it to receive new connections.
+ #[cfg(not(target_os = "wasi"))]
+ pub fn bind(addr: SocketAddr) -> io::Result<TcpListener> {
+ let socket = new_for_addr(addr)?;
+ #[cfg(unix)]
+ let listener = unsafe { TcpListener::from_raw_fd(socket) };
+ #[cfg(windows)]
+ let listener = unsafe { TcpListener::from_raw_socket(socket as _) };
+
+ // On platforms with Berkeley-derived sockets, this allows to quickly
+ // rebind a socket, without needing to wait for the OS to clean up the
+ // previous one.
+ //
+ // On Windows, this allows rebinding sockets which are actively in use,
+ // which allows “socket hijacking”, so we explicitly don't set it here.
+ // https://docs.microsoft.com/en-us/windows/win32/winsock/using-so-reuseaddr-and-so-exclusiveaddruse
+ #[cfg(not(windows))]
+ set_reuseaddr(&listener.inner, true)?;
+
+ bind(&listener.inner, addr)?;
+ listen(&listener.inner, 1024)?;
+ Ok(listener)
+ }
+
+ /// Creates a new `TcpListener` from a standard `net::TcpListener`.
+ ///
+ /// This function is intended to be used to wrap a TCP listener from the
+ /// standard library in the Mio equivalent. The conversion assumes nothing
+ /// about the underlying listener; ; it is left up to the user to set it
+ /// in non-blocking mode.
+ pub fn from_std(listener: net::TcpListener) -> TcpListener {
+ TcpListener {
+ inner: IoSource::new(listener),
+ }
+ }
+
+ /// Accepts a new `TcpStream`.
+ ///
+ /// This may return an `Err(e)` where `e.kind()` is
+ /// `io::ErrorKind::WouldBlock`. This means a stream may be ready at a later
+ /// point and one should wait for an event before calling `accept` again.
+ ///
+ /// If an accepted stream is returned, the remote address of the peer is
+ /// returned along with it.
+ pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> {
+ self.inner.do_io(|inner| {
+ sys::tcp::accept(inner).map(|(stream, addr)| (TcpStream::from_std(stream), addr))
+ })
+ }
+
+ /// Returns the local socket address of this listener.
+ pub fn local_addr(&self) -> io::Result<SocketAddr> {
+ self.inner.local_addr()
+ }
+
+ /// Sets the value for the `IP_TTL` option on this socket.
+ ///
+ /// This value sets the time-to-live field that is used in every packet sent
+ /// from this socket.
+ pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
+ self.inner.set_ttl(ttl)
+ }
+
+ /// Gets the value of the `IP_TTL` option for this socket.
+ ///
+ /// For more information about this option, see [`set_ttl`][link].
+ ///
+ /// [link]: #method.set_ttl
+ pub fn ttl(&self) -> io::Result<u32> {
+ self.inner.ttl()
+ }
+
+ /// Get the value of the `SO_ERROR` option on this socket.
+ ///
+ /// This will retrieve the stored error in the underlying socket, clearing
+ /// the field in the process. This can be useful for checking errors between
+ /// calls.
+ pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+ self.inner.take_error()
+ }
+}
+
+impl event::Source for TcpListener {
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.register(registry, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.reregister(registry, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ self.inner.deregister(registry)
+ }
+}
+
+impl fmt::Debug for TcpListener {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ self.inner.fmt(f)
+ }
+}
+
+#[cfg(unix)]
+impl IntoRawFd for TcpListener {
+ fn into_raw_fd(self) -> RawFd {
+ self.inner.into_inner().into_raw_fd()
+ }
+}
+
+#[cfg(unix)]
+impl AsRawFd for TcpListener {
+ fn as_raw_fd(&self) -> RawFd {
+ self.inner.as_raw_fd()
+ }
+}
+
+#[cfg(unix)]
+impl FromRawFd for TcpListener {
+ /// Converts a `RawFd` to a `TcpListener`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_fd(fd: RawFd) -> TcpListener {
+ TcpListener::from_std(FromRawFd::from_raw_fd(fd))
+ }
+}
+
+#[cfg(windows)]
+impl IntoRawSocket for TcpListener {
+ fn into_raw_socket(self) -> RawSocket {
+ self.inner.into_inner().into_raw_socket()
+ }
+}
+
+#[cfg(windows)]
+impl AsRawSocket for TcpListener {
+ fn as_raw_socket(&self) -> RawSocket {
+ self.inner.as_raw_socket()
+ }
+}
+
+#[cfg(windows)]
+impl FromRawSocket for TcpListener {
+ /// Converts a `RawSocket` to a `TcpListener`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_socket(socket: RawSocket) -> TcpListener {
+ TcpListener::from_std(FromRawSocket::from_raw_socket(socket))
+ }
+}
+
+#[cfg(target_os = "wasi")]
+impl IntoRawFd for TcpListener {
+ fn into_raw_fd(self) -> RawFd {
+ self.inner.into_inner().into_raw_fd()
+ }
+}
+
+#[cfg(target_os = "wasi")]
+impl AsRawFd for TcpListener {
+ fn as_raw_fd(&self) -> RawFd {
+ self.inner.as_raw_fd()
+ }
+}
+
+#[cfg(target_os = "wasi")]
+impl FromRawFd for TcpListener {
+ /// Converts a `RawFd` to a `TcpListener`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_fd(fd: RawFd) -> TcpListener {
+ TcpListener::from_std(FromRawFd::from_raw_fd(fd))
+ }
+}
diff --git a/mio/src/net/tcp/mod.rs b/mio/src/net/tcp/mod.rs
new file mode 100644
index 0000000..94af5c1
--- /dev/null
+++ b/mio/src/net/tcp/mod.rs
@@ -0,0 +1,5 @@
+mod listener;
+pub use self::listener::TcpListener;
+
+mod stream;
+pub use self::stream::TcpStream;
diff --git a/mio/src/net/tcp/stream.rs b/mio/src/net/tcp/stream.rs
new file mode 100644
index 0000000..8a3f6a2
--- /dev/null
+++ b/mio/src/net/tcp/stream.rs
@@ -0,0 +1,427 @@
+use std::fmt;
+use std::io::{self, IoSlice, IoSliceMut, Read, Write};
+use std::net::{self, Shutdown, SocketAddr};
+#[cfg(unix)]
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+#[cfg(target_os = "wasi")]
+use std::os::wasi::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+#[cfg(windows)]
+use std::os::windows::io::{AsRawSocket, FromRawSocket, IntoRawSocket, RawSocket};
+
+use crate::io_source::IoSource;
+#[cfg(not(target_os = "wasi"))]
+use crate::sys::tcp::{connect, new_for_addr};
+use crate::{event, Interest, Registry, Token};
+
+/// A non-blocking TCP stream between a local socket and a remote socket.
+///
+/// The socket will be closed when the value is dropped.
+///
+/// # Examples
+///
+#[cfg_attr(feature = "os-poll", doc = "```")]
+#[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+/// # use std::net::{TcpListener, SocketAddr};
+/// # use std::error::Error;
+/// #
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// let address: SocketAddr = "127.0.0.1:0".parse()?;
+/// let listener = TcpListener::bind(address)?;
+/// use mio::{Events, Interest, Poll, Token};
+/// use mio::net::TcpStream;
+/// use std::time::Duration;
+///
+/// let mut stream = TcpStream::connect(listener.local_addr()?)?;
+///
+/// let mut poll = Poll::new()?;
+/// let mut events = Events::with_capacity(128);
+///
+/// // Register the socket with `Poll`
+/// poll.registry().register(&mut stream, Token(0), Interest::WRITABLE)?;
+///
+/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+///
+/// // The socket might be ready at this point
+/// # Ok(())
+/// # }
+/// ```
+pub struct TcpStream {
+ inner: IoSource<net::TcpStream>,
+}
+
+impl TcpStream {
+ /// Create a new TCP stream and issue a non-blocking connect to the
+ /// specified address.
+ ///
+ /// # Notes
+ ///
+ /// The returned `TcpStream` may not be connected (and thus usable), unlike
+ /// the API found in `std::net::TcpStream`. Because Mio issues a
+ /// *non-blocking* connect it will not block the thread and instead return
+ /// an unconnected `TcpStream`.
+ ///
+ /// Ensuring the returned stream is connected is surprisingly complex when
+ /// considering cross-platform support. Doing this properly should follow
+ /// the steps below, an example implementation can be found
+ /// [here](https://github.com/Thomasdezeeuw/heph/blob/0c4f1ab3eaf08bea1d65776528bfd6114c9f8374/src/net/tcp/stream.rs#L560-L622).
+ ///
+ /// 1. Call `TcpStream::connect`
+ /// 2. Register the returned stream with at least [write interest].
+ /// 3. Wait for a (writable) event.
+ /// 4. Check `TcpStream::peer_addr`. If it returns `libc::EINPROGRESS` or
+ /// `ErrorKind::NotConnected` it means the stream is not yet connected,
+ /// go back to step 3. If it returns an address it means the stream is
+ /// connected, go to step 5. If another error is returned something
+ /// went wrong.
+ /// 5. Now the stream can be used.
+ ///
+ /// This may return a `WouldBlock` in which case the socket connection
+ /// cannot be completed immediately, it usually means there are insufficient
+ /// entries in the routing cache.
+ ///
+ /// [write interest]: Interest::WRITABLE
+ #[cfg(not(target_os = "wasi"))]
+ pub fn connect(addr: SocketAddr) -> io::Result<TcpStream> {
+ let socket = new_for_addr(addr)?;
+ #[cfg(unix)]
+ let stream = unsafe { TcpStream::from_raw_fd(socket) };
+ #[cfg(windows)]
+ let stream = unsafe { TcpStream::from_raw_socket(socket as _) };
+ connect(&stream.inner, addr)?;
+ Ok(stream)
+ }
+
+ /// Creates a new `TcpStream` from a standard `net::TcpStream`.
+ ///
+ /// This function is intended to be used to wrap a TCP stream from the
+ /// standard library in the Mio equivalent. The conversion assumes nothing
+ /// about the underlying stream; it is left up to the user to set it in
+ /// non-blocking mode.
+ ///
+ /// # Note
+ ///
+ /// The TCP stream here will not have `connect` called on it, so it
+ /// should already be connected via some other means (be it manually, or
+ /// the standard library).
+ pub fn from_std(stream: net::TcpStream) -> TcpStream {
+ TcpStream {
+ inner: IoSource::new(stream),
+ }
+ }
+
+ /// Returns the socket address of the remote peer of this TCP connection.
+ pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+ self.inner.peer_addr()
+ }
+
+ /// Returns the socket address of the local half of this TCP connection.
+ pub fn local_addr(&self) -> io::Result<SocketAddr> {
+ self.inner.local_addr()
+ }
+
+ /// Shuts down the read, write, or both halves of this connection.
+ ///
+ /// This function will cause all pending and future I/O on the specified
+ /// portions to return immediately with an appropriate value (see the
+ /// documentation of `Shutdown`).
+ pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
+ self.inner.shutdown(how)
+ }
+
+ /// Sets the value of the `TCP_NODELAY` option on this socket.
+ ///
+ /// If set, this option disables the Nagle algorithm. This means that
+ /// segments are always sent as soon as possible, even if there is only a
+ /// small amount of data. When not set, data is buffered until there is a
+ /// sufficient amount to send out, thereby avoiding the frequent sending of
+ /// small packets.
+ ///
+ /// # Notes
+ ///
+ /// On Windows make sure the stream is connected before calling this method,
+ /// by receiving an (writable) event. Trying to set `nodelay` on an
+ /// unconnected `TcpStream` is unspecified behavior.
+ pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> {
+ self.inner.set_nodelay(nodelay)
+ }
+
+ /// Gets the value of the `TCP_NODELAY` option on this socket.
+ ///
+ /// For more information about this option, see [`set_nodelay`][link].
+ ///
+ /// [link]: #method.set_nodelay
+ ///
+ /// # Notes
+ ///
+ /// On Windows make sure the stream is connected before calling this method,
+ /// by receiving an (writable) event. Trying to get `nodelay` on an
+ /// unconnected `TcpStream` is unspecified behavior.
+ pub fn nodelay(&self) -> io::Result<bool> {
+ self.inner.nodelay()
+ }
+
+ /// Sets the value for the `IP_TTL` option on this socket.
+ ///
+ /// This value sets the time-to-live field that is used in every packet sent
+ /// from this socket.
+ ///
+ /// # Notes
+ ///
+ /// On Windows make sure the stream is connected before calling this method,
+ /// by receiving an (writable) event. Trying to set `ttl` on an
+ /// unconnected `TcpStream` is unspecified behavior.
+ pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
+ self.inner.set_ttl(ttl)
+ }
+
+ /// Gets the value of the `IP_TTL` option for this socket.
+ ///
+ /// For more information about this option, see [`set_ttl`][link].
+ ///
+ /// # Notes
+ ///
+ /// On Windows make sure the stream is connected before calling this method,
+ /// by receiving an (writable) event. Trying to get `ttl` on an
+ /// unconnected `TcpStream` is unspecified behavior.
+ ///
+ /// [link]: #method.set_ttl
+ pub fn ttl(&self) -> io::Result<u32> {
+ self.inner.ttl()
+ }
+
+ /// Get the value of the `SO_ERROR` option on this socket.
+ ///
+ /// This will retrieve the stored error in the underlying socket, clearing
+ /// the field in the process. This can be useful for checking errors between
+ /// calls.
+ pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+ self.inner.take_error()
+ }
+
+ /// Receives data on the socket from the remote address to which it is
+ /// connected, without removing that data from the queue. On success,
+ /// returns the number of bytes peeked.
+ ///
+ /// Successive calls return the same data. This is accomplished by passing
+ /// `MSG_PEEK` as a flag to the underlying recv system call.
+ pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.peek(buf)
+ }
+
+ /// Execute an I/O operation ensuring that the socket receives more events
+ /// if it hits a [`WouldBlock`] error.
+ ///
+ /// # Notes
+ ///
+ /// This method is required to be called for **all** I/O operations to
+ /// ensure the user will receive events once the socket is ready again after
+ /// returning a [`WouldBlock`] error.
+ ///
+ /// [`WouldBlock`]: io::ErrorKind::WouldBlock
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(unix, doc = "```no_run")]
+ #[cfg_attr(windows, doc = "```ignore")]
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use std::io;
+ /// #[cfg(unix)]
+ /// use std::os::unix::io::AsRawFd;
+ /// #[cfg(windows)]
+ /// use std::os::windows::io::AsRawSocket;
+ /// use mio::net::TcpStream;
+ ///
+ /// let address = "127.0.0.1:8080".parse().unwrap();
+ /// let stream = TcpStream::connect(address)?;
+ ///
+ /// // Wait until the stream is readable...
+ ///
+ /// // Read from the stream using a direct libc call, of course the
+ /// // `io::Read` implementation would be easier to use.
+ /// let mut buf = [0; 512];
+ /// let n = stream.try_io(|| {
+ /// let buf_ptr = &mut buf as *mut _ as *mut _;
+ /// #[cfg(unix)]
+ /// let res = unsafe { libc::recv(stream.as_raw_fd(), buf_ptr, buf.len(), 0) };
+ /// #[cfg(windows)]
+ /// let res = unsafe { libc::recvfrom(stream.as_raw_socket() as usize, buf_ptr, buf.len() as i32, 0, std::ptr::null_mut(), std::ptr::null_mut()) };
+ /// if res != -1 {
+ /// Ok(res as usize)
+ /// } else {
+ /// // If EAGAIN or EWOULDBLOCK is set by libc::recv, the closure
+ /// // should return `WouldBlock` error.
+ /// Err(io::Error::last_os_error())
+ /// }
+ /// })?;
+ /// eprintln!("read {} bytes", n);
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn try_io<F, T>(&self, f: F) -> io::Result<T>
+ where
+ F: FnOnce() -> io::Result<T>,
+ {
+ self.inner.do_io(|_| f())
+ }
+}
+
+impl Read for TcpStream {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.read(buf))
+ }
+
+ fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.read_vectored(bufs))
+ }
+}
+
+impl<'a> Read for &'a TcpStream {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.read(buf))
+ }
+
+ fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.read_vectored(bufs))
+ }
+}
+
+impl Write for TcpStream {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.write(buf))
+ }
+
+ fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.write_vectored(bufs))
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.do_io(|mut inner| inner.flush())
+ }
+}
+
+impl<'a> Write for &'a TcpStream {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.write(buf))
+ }
+
+ fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.write_vectored(bufs))
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.do_io(|mut inner| inner.flush())
+ }
+}
+
+impl event::Source for TcpStream {
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.register(registry, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.reregister(registry, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ self.inner.deregister(registry)
+ }
+}
+
+impl fmt::Debug for TcpStream {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ self.inner.fmt(f)
+ }
+}
+
+#[cfg(unix)]
+impl IntoRawFd for TcpStream {
+ fn into_raw_fd(self) -> RawFd {
+ self.inner.into_inner().into_raw_fd()
+ }
+}
+
+#[cfg(unix)]
+impl AsRawFd for TcpStream {
+ fn as_raw_fd(&self) -> RawFd {
+ self.inner.as_raw_fd()
+ }
+}
+
+#[cfg(unix)]
+impl FromRawFd for TcpStream {
+ /// Converts a `RawFd` to a `TcpStream`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_fd(fd: RawFd) -> TcpStream {
+ TcpStream::from_std(FromRawFd::from_raw_fd(fd))
+ }
+}
+
+#[cfg(windows)]
+impl IntoRawSocket for TcpStream {
+ fn into_raw_socket(self) -> RawSocket {
+ self.inner.into_inner().into_raw_socket()
+ }
+}
+
+#[cfg(windows)]
+impl AsRawSocket for TcpStream {
+ fn as_raw_socket(&self) -> RawSocket {
+ self.inner.as_raw_socket()
+ }
+}
+
+#[cfg(windows)]
+impl FromRawSocket for TcpStream {
+ /// Converts a `RawSocket` to a `TcpStream`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_socket(socket: RawSocket) -> TcpStream {
+ TcpStream::from_std(FromRawSocket::from_raw_socket(socket))
+ }
+}
+
+#[cfg(target_os = "wasi")]
+impl IntoRawFd for TcpStream {
+ fn into_raw_fd(self) -> RawFd {
+ self.inner.into_inner().into_raw_fd()
+ }
+}
+
+#[cfg(target_os = "wasi")]
+impl AsRawFd for TcpStream {
+ fn as_raw_fd(&self) -> RawFd {
+ self.inner.as_raw_fd()
+ }
+}
+
+#[cfg(target_os = "wasi")]
+impl FromRawFd for TcpStream {
+ /// Converts a `RawFd` to a `TcpStream`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_fd(fd: RawFd) -> TcpStream {
+ TcpStream::from_std(FromRawFd::from_raw_fd(fd))
+ }
+}
diff --git a/mio/src/net/udp.rs b/mio/src/net/udp.rs
new file mode 100644
index 0000000..5abe12e
--- /dev/null
+++ b/mio/src/net/udp.rs
@@ -0,0 +1,697 @@
+//! Primitives for working with UDP.
+//!
+//! The types provided in this module are non-blocking by default and are
+//! designed to be portable across all supported Mio platforms. As long as the
+//! [portability guidelines] are followed, the behavior should be identical no
+//! matter the target platform.
+//!
+//! [portability guidelines]: ../struct.Poll.html#portability
+
+use crate::io_source::IoSource;
+use crate::{event, sys, Interest, Registry, Token};
+
+use std::fmt;
+use std::io;
+use std::net;
+use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr};
+#[cfg(unix)]
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+#[cfg(windows)]
+use std::os::windows::io::{AsRawSocket, FromRawSocket, IntoRawSocket, RawSocket};
+
+/// A User Datagram Protocol socket.
+///
+/// This is an implementation of a bound UDP socket. This supports both IPv4 and
+/// IPv6 addresses, and there is no corresponding notion of a server because UDP
+/// is a datagram protocol.
+///
+/// # Examples
+///
+#[cfg_attr(feature = "os-poll", doc = "```")]
+#[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+/// # use std::error::Error;
+/// #
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// // An Echo program:
+/// // SENDER -> sends a message.
+/// // ECHOER -> listens and prints the message received.
+///
+/// use mio::net::UdpSocket;
+/// use mio::{Events, Interest, Poll, Token};
+/// use std::time::Duration;
+///
+/// const SENDER: Token = Token(0);
+/// const ECHOER: Token = Token(1);
+///
+/// // This operation will fail if the address is in use, so we select different ports for each
+/// // socket.
+/// let mut sender_socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+/// let mut echoer_socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+///
+/// // If we do not use connect here, SENDER and ECHOER would need to call send_to and recv_from
+/// // respectively.
+/// sender_socket.connect(echoer_socket.local_addr()?)?;
+///
+/// // We need a Poll to check if SENDER is ready to be written into, and if ECHOER is ready to be
+/// // read from.
+/// let mut poll = Poll::new()?;
+///
+/// // We register our sockets here so that we can check if they are ready to be written/read.
+/// poll.registry().register(&mut sender_socket, SENDER, Interest::WRITABLE)?;
+/// poll.registry().register(&mut echoer_socket, ECHOER, Interest::READABLE)?;
+///
+/// let msg_to_send = [9; 9];
+/// let mut buffer = [0; 9];
+///
+/// let mut events = Events::with_capacity(128);
+/// loop {
+/// poll.poll(&mut events, Some(Duration::from_millis(100)))?;
+/// for event in events.iter() {
+/// match event.token() {
+/// // Our SENDER is ready to be written into.
+/// SENDER => {
+/// let bytes_sent = sender_socket.send(&msg_to_send)?;
+/// assert_eq!(bytes_sent, 9);
+/// println!("sent {:?} -> {:?} bytes", msg_to_send, bytes_sent);
+/// },
+/// // Our ECHOER is ready to be read from.
+/// ECHOER => {
+/// let num_recv = echoer_socket.recv(&mut buffer)?;
+/// println!("echo {:?} -> {:?}", buffer, num_recv);
+/// buffer = [0; 9];
+/// # drop(buffer); // Silence unused assignment warning.
+/// # return Ok(());
+/// }
+/// _ => unreachable!()
+/// }
+/// }
+/// }
+/// # }
+/// ```
+pub struct UdpSocket {
+ inner: IoSource<net::UdpSocket>,
+}
+
+impl UdpSocket {
+ /// Creates a UDP socket from the given address.
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(feature = "os-poll", doc = "```")]
+ #[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::net::UdpSocket;
+ ///
+ /// // We must bind it to an open address.
+ /// let socket = match UdpSocket::bind("127.0.0.1:0".parse()?) {
+ /// Ok(new_socket) => new_socket,
+ /// Err(fail) => {
+ /// // We panic! here, but you could try to bind it again on another address.
+ /// panic!("Failed to bind socket. {:?}", fail);
+ /// }
+ /// };
+ ///
+ /// // Our socket was created, but we should not use it before checking it's readiness.
+ /// # drop(socket); // Silence unused variable warning.
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn bind(addr: SocketAddr) -> io::Result<UdpSocket> {
+ sys::udp::bind(addr).map(UdpSocket::from_std)
+ }
+
+ /// Creates a new `UdpSocket` from a standard `net::UdpSocket`.
+ ///
+ /// This function is intended to be used to wrap a UDP socket from the
+ /// standard library in the Mio equivalent. The conversion assumes nothing
+ /// about the underlying socket; it is left up to the user to set it in
+ /// non-blocking mode.
+ pub fn from_std(socket: net::UdpSocket) -> UdpSocket {
+ UdpSocket {
+ inner: IoSource::new(socket),
+ }
+ }
+
+ /// Returns the socket address that this socket was created from.
+ ///
+ /// # Examples
+ ///
+ // This assertion is almost, but not quite, universal. It fails on
+ // shared-IP FreeBSD jails. It's hard for mio to know whether we're jailed,
+ // so simply disable the test on FreeBSD.
+ #[cfg_attr(all(feature = "os-poll", not(target_os = "freebsd")), doc = "```")]
+ #[cfg_attr(
+ any(not(feature = "os-poll"), target_os = "freebsd"),
+ doc = "```ignore"
+ )]
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::net::UdpSocket;
+ ///
+ /// let addr = "127.0.0.1:0".parse()?;
+ /// let socket = UdpSocket::bind(addr)?;
+ /// assert_eq!(socket.local_addr()?.ip(), addr.ip());
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn local_addr(&self) -> io::Result<SocketAddr> {
+ self.inner.local_addr()
+ }
+
+ /// Returns the socket address of the remote peer this socket was connected to.
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(feature = "os-poll", doc = "```")]
+ #[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::net::UdpSocket;
+ ///
+ /// let addr = "127.0.0.1:0".parse()?;
+ /// let peer_addr = "127.0.0.1:11100".parse()?;
+ /// let socket = UdpSocket::bind(addr)?;
+ /// socket.connect(peer_addr)?;
+ /// assert_eq!(socket.peer_addr()?.ip(), peer_addr.ip());
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+ self.inner.peer_addr()
+ }
+
+ /// Sends data on the socket to the given address. On success, returns the
+ /// number of bytes written.
+ ///
+ /// Address type can be any implementor of `ToSocketAddrs` trait. See its
+ /// documentation for concrete examples.
+ ///
+ /// # Examples
+ ///
+ /// ```no_run
+ /// # use std::error::Error;
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::net::UdpSocket;
+ ///
+ /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+ ///
+ /// // We must check if the socket is writable before calling send_to,
+ /// // or we could run into a WouldBlock error.
+ ///
+ /// let bytes_sent = socket.send_to(&[9; 9], "127.0.0.1:11100".parse()?)?;
+ /// assert_eq!(bytes_sent, 9);
+ /// #
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn send_to(&self, buf: &[u8], target: SocketAddr) -> io::Result<usize> {
+ self.inner.do_io(|inner| inner.send_to(buf, target))
+ }
+
+ /// Receives data from the socket. On success, returns the number of bytes
+ /// read and the address from whence the data came.
+ ///
+ /// # Notes
+ ///
+ /// On Windows, if the data is larger than the buffer specified, the buffer
+ /// is filled with the first part of the data, and recv_from returns the error
+ /// WSAEMSGSIZE(10040). The excess data is lost.
+ /// Make sure to always use a sufficiently large buffer to hold the
+ /// maximum UDP packet size, which can be up to 65536 bytes in size.
+ ///
+ /// # Examples
+ ///
+ /// ```no_run
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::net::UdpSocket;
+ ///
+ /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+ ///
+ /// // We must check if the socket is readable before calling recv_from,
+ /// // or we could run into a WouldBlock error.
+ ///
+ /// let mut buf = [0; 9];
+ /// let (num_recv, from_addr) = socket.recv_from(&mut buf)?;
+ /// println!("Received {:?} -> {:?} bytes from {:?}", buf, num_recv, from_addr);
+ /// #
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn recv_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+ self.inner.do_io(|inner| inner.recv_from(buf))
+ }
+
+ /// Receives data from the socket, without removing it from the input queue.
+ /// On success, returns the number of bytes read and the address from whence
+ /// the data came.
+ ///
+ /// # Notes
+ ///
+ /// On Windows, if the data is larger than the buffer specified, the buffer
+ /// is filled with the first part of the data, and peek_from returns the error
+ /// WSAEMSGSIZE(10040). The excess data is lost.
+ /// Make sure to always use a sufficiently large buffer to hold the
+ /// maximum UDP packet size, which can be up to 65536 bytes in size.
+ ///
+ /// # Examples
+ ///
+ /// ```no_run
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::net::UdpSocket;
+ ///
+ /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+ ///
+ /// // We must check if the socket is readable before calling recv_from,
+ /// // or we could run into a WouldBlock error.
+ ///
+ /// let mut buf = [0; 9];
+ /// let (num_recv, from_addr) = socket.peek_from(&mut buf)?;
+ /// println!("Received {:?} -> {:?} bytes from {:?}", buf, num_recv, from_addr);
+ /// #
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn peek_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
+ self.inner.do_io(|inner| inner.peek_from(buf))
+ }
+
+ /// Sends data on the socket to the address previously bound via connect(). On success,
+ /// returns the number of bytes written.
+ pub fn send(&self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.do_io(|inner| inner.send(buf))
+ }
+
+ /// Receives data from the socket previously bound with connect(). On success, returns
+ /// the number of bytes read.
+ ///
+ /// # Notes
+ ///
+ /// On Windows, if the data is larger than the buffer specified, the buffer
+ /// is filled with the first part of the data, and recv returns the error
+ /// WSAEMSGSIZE(10040). The excess data is lost.
+ /// Make sure to always use a sufficiently large buffer to hold the
+ /// maximum UDP packet size, which can be up to 65536 bytes in size.
+ pub fn recv(&self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.do_io(|inner| inner.recv(buf))
+ }
+
+ /// Receives data from the socket, without removing it from the input queue.
+ /// On success, returns the number of bytes read.
+ ///
+ /// # Notes
+ ///
+ /// On Windows, if the data is larger than the buffer specified, the buffer
+ /// is filled with the first part of the data, and peek returns the error
+ /// WSAEMSGSIZE(10040). The excess data is lost.
+ /// Make sure to always use a sufficiently large buffer to hold the
+ /// maximum UDP packet size, which can be up to 65536 bytes in size.
+ pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.do_io(|inner| inner.peek(buf))
+ }
+
+ /// Connects the UDP socket setting the default destination for `send()`
+ /// and limiting packets that are read via `recv` from the address specified
+ /// in `addr`.
+ ///
+ /// This may return a `WouldBlock` in which case the socket connection
+ /// cannot be completed immediately, it usually means there are insufficient
+ /// entries in the routing cache.
+ pub fn connect(&self, addr: SocketAddr) -> io::Result<()> {
+ self.inner.connect(addr)
+ }
+
+ /// Sets the value of the `SO_BROADCAST` option for this socket.
+ ///
+ /// When enabled, this socket is allowed to send packets to a broadcast
+ /// address.
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(feature = "os-poll", doc = "```")]
+ #[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::net::UdpSocket;
+ ///
+ /// let broadcast_socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+ /// if broadcast_socket.broadcast()? == false {
+ /// broadcast_socket.set_broadcast(true)?;
+ /// }
+ ///
+ /// assert_eq!(broadcast_socket.broadcast()?, true);
+ /// #
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn set_broadcast(&self, on: bool) -> io::Result<()> {
+ self.inner.set_broadcast(on)
+ }
+
+ /// Gets the value of the `SO_BROADCAST` option for this socket.
+ ///
+ /// For more information about this option, see
+ /// [`set_broadcast`][link].
+ ///
+ /// [link]: #method.set_broadcast
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(feature = "os-poll", doc = "```")]
+ #[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::net::UdpSocket;
+ ///
+ /// let broadcast_socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+ /// assert_eq!(broadcast_socket.broadcast()?, false);
+ /// #
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn broadcast(&self) -> io::Result<bool> {
+ self.inner.broadcast()
+ }
+
+ /// Sets the value of the `IP_MULTICAST_LOOP` option for this socket.
+ ///
+ /// If enabled, multicast packets will be looped back to the local socket.
+ /// Note that this may not have any affect on IPv6 sockets.
+ pub fn set_multicast_loop_v4(&self, on: bool) -> io::Result<()> {
+ self.inner.set_multicast_loop_v4(on)
+ }
+
+ /// Gets the value of the `IP_MULTICAST_LOOP` option for this socket.
+ ///
+ /// For more information about this option, see
+ /// [`set_multicast_loop_v4`][link].
+ ///
+ /// [link]: #method.set_multicast_loop_v4
+ pub fn multicast_loop_v4(&self) -> io::Result<bool> {
+ self.inner.multicast_loop_v4()
+ }
+
+ /// Sets the value of the `IP_MULTICAST_TTL` option for this socket.
+ ///
+ /// Indicates the time-to-live value of outgoing multicast packets for
+ /// this socket. The default value is 1 which means that multicast packets
+ /// don't leave the local network unless explicitly requested.
+ ///
+ /// Note that this may not have any affect on IPv6 sockets.
+ pub fn set_multicast_ttl_v4(&self, ttl: u32) -> io::Result<()> {
+ self.inner.set_multicast_ttl_v4(ttl)
+ }
+
+ /// Gets the value of the `IP_MULTICAST_TTL` option for this socket.
+ ///
+ /// For more information about this option, see
+ /// [`set_multicast_ttl_v4`][link].
+ ///
+ /// [link]: #method.set_multicast_ttl_v4
+ pub fn multicast_ttl_v4(&self) -> io::Result<u32> {
+ self.inner.multicast_ttl_v4()
+ }
+
+ /// Sets the value of the `IPV6_MULTICAST_LOOP` option for this socket.
+ ///
+ /// Controls whether this socket sees the multicast packets it sends itself.
+ /// Note that this may not have any affect on IPv4 sockets.
+ pub fn set_multicast_loop_v6(&self, on: bool) -> io::Result<()> {
+ self.inner.set_multicast_loop_v6(on)
+ }
+
+ /// Gets the value of the `IPV6_MULTICAST_LOOP` option for this socket.
+ ///
+ /// For more information about this option, see
+ /// [`set_multicast_loop_v6`][link].
+ ///
+ /// [link]: #method.set_multicast_loop_v6
+ pub fn multicast_loop_v6(&self) -> io::Result<bool> {
+ self.inner.multicast_loop_v6()
+ }
+
+ /// Sets the value for the `IP_TTL` option on this socket.
+ ///
+ /// This value sets the time-to-live field that is used in every packet sent
+ /// from this socket.
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(feature = "os-poll", doc = "```")]
+ #[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::net::UdpSocket;
+ ///
+ /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+ /// if socket.ttl()? < 255 {
+ /// socket.set_ttl(255)?;
+ /// }
+ ///
+ /// assert_eq!(socket.ttl()?, 255);
+ /// #
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
+ self.inner.set_ttl(ttl)
+ }
+
+ /// Gets the value of the `IP_TTL` option for this socket.
+ ///
+ /// For more information about this option, see [`set_ttl`][link].
+ ///
+ /// [link]: #method.set_ttl
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(feature = "os-poll", doc = "```")]
+ #[cfg_attr(not(feature = "os-poll"), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::net::UdpSocket;
+ ///
+ /// let socket = UdpSocket::bind("127.0.0.1:0".parse()?)?;
+ /// socket.set_ttl(255)?;
+ ///
+ /// assert_eq!(socket.ttl()?, 255);
+ /// #
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn ttl(&self) -> io::Result<u32> {
+ self.inner.ttl()
+ }
+
+ /// Executes an operation of the `IP_ADD_MEMBERSHIP` type.
+ ///
+ /// This function specifies a new multicast group for this socket to join.
+ /// The address must be a valid multicast address, and `interface` is the
+ /// address of the local interface with which the system should join the
+ /// multicast group. If it's equal to `INADDR_ANY` then an appropriate
+ /// interface is chosen by the system.
+ #[allow(clippy::trivially_copy_pass_by_ref)]
+ pub fn join_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> io::Result<()> {
+ self.inner.join_multicast_v4(multiaddr, interface)
+ }
+
+ /// Executes an operation of the `IPV6_ADD_MEMBERSHIP` type.
+ ///
+ /// This function specifies a new multicast group for this socket to join.
+ /// The address must be a valid multicast address, and `interface` is the
+ /// index of the interface to join/leave (or 0 to indicate any interface).
+ #[allow(clippy::trivially_copy_pass_by_ref)]
+ pub fn join_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> {
+ self.inner.join_multicast_v6(multiaddr, interface)
+ }
+
+ /// Executes an operation of the `IP_DROP_MEMBERSHIP` type.
+ ///
+ /// For more information about this option, see
+ /// [`join_multicast_v4`][link].
+ ///
+ /// [link]: #method.join_multicast_v4
+ #[allow(clippy::trivially_copy_pass_by_ref)]
+ pub fn leave_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> io::Result<()> {
+ self.inner.leave_multicast_v4(multiaddr, interface)
+ }
+
+ /// Executes an operation of the `IPV6_DROP_MEMBERSHIP` type.
+ ///
+ /// For more information about this option, see
+ /// [`join_multicast_v6`][link].
+ ///
+ /// [link]: #method.join_multicast_v6
+ #[allow(clippy::trivially_copy_pass_by_ref)]
+ pub fn leave_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> {
+ self.inner.leave_multicast_v6(multiaddr, interface)
+ }
+
+ /// Get the value of the `IPV6_V6ONLY` option on this socket.
+ #[allow(clippy::trivially_copy_pass_by_ref)]
+ pub fn only_v6(&self) -> io::Result<bool> {
+ sys::udp::only_v6(&self.inner)
+ }
+
+ /// Get the value of the `SO_ERROR` option on this socket.
+ ///
+ /// This will retrieve the stored error in the underlying socket, clearing
+ /// the field in the process. This can be useful for checking errors between
+ /// calls.
+ pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+ self.inner.take_error()
+ }
+
+ /// Execute an I/O operation ensuring that the socket receives more events
+ /// if it hits a [`WouldBlock`] error.
+ ///
+ /// # Notes
+ ///
+ /// This method is required to be called for **all** I/O operations to
+ /// ensure the user will receive events once the socket is ready again after
+ /// returning a [`WouldBlock`] error.
+ ///
+ /// [`WouldBlock`]: io::ErrorKind::WouldBlock
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(unix, doc = "```no_run")]
+ #[cfg_attr(windows, doc = "```ignore")]
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use std::io;
+ /// #[cfg(unix)]
+ /// use std::os::unix::io::AsRawFd;
+ /// #[cfg(windows)]
+ /// use std::os::windows::io::AsRawSocket;
+ /// use mio::net::UdpSocket;
+ ///
+ /// let address = "127.0.0.1:8080".parse().unwrap();
+ /// let dgram = UdpSocket::bind(address)?;
+ ///
+ /// // Wait until the dgram is readable...
+ ///
+ /// // Read from the dgram using a direct libc call, of course the
+ /// // `io::Read` implementation would be easier to use.
+ /// let mut buf = [0; 512];
+ /// let n = dgram.try_io(|| {
+ /// let buf_ptr = &mut buf as *mut _ as *mut _;
+ /// #[cfg(unix)]
+ /// let res = unsafe { libc::recv(dgram.as_raw_fd(), buf_ptr, buf.len(), 0) };
+ /// #[cfg(windows)]
+ /// let res = unsafe { libc::recvfrom(dgram.as_raw_socket() as usize, buf_ptr, buf.len() as i32, 0, std::ptr::null_mut(), std::ptr::null_mut()) };
+ /// if res != -1 {
+ /// Ok(res as usize)
+ /// } else {
+ /// // If EAGAIN or EWOULDBLOCK is set by libc::recv, the closure
+ /// // should return `WouldBlock` error.
+ /// Err(io::Error::last_os_error())
+ /// }
+ /// })?;
+ /// eprintln!("read {} bytes", n);
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn try_io<F, T>(&self, f: F) -> io::Result<T>
+ where
+ F: FnOnce() -> io::Result<T>,
+ {
+ self.inner.do_io(|_| f())
+ }
+}
+
+impl event::Source for UdpSocket {
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.register(registry, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.reregister(registry, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ self.inner.deregister(registry)
+ }
+}
+
+impl fmt::Debug for UdpSocket {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ self.inner.fmt(f)
+ }
+}
+
+#[cfg(unix)]
+impl IntoRawFd for UdpSocket {
+ fn into_raw_fd(self) -> RawFd {
+ self.inner.into_inner().into_raw_fd()
+ }
+}
+
+#[cfg(unix)]
+impl AsRawFd for UdpSocket {
+ fn as_raw_fd(&self) -> RawFd {
+ self.inner.as_raw_fd()
+ }
+}
+
+#[cfg(unix)]
+impl FromRawFd for UdpSocket {
+ /// Converts a `RawFd` to a `UdpSocket`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_fd(fd: RawFd) -> UdpSocket {
+ UdpSocket::from_std(FromRawFd::from_raw_fd(fd))
+ }
+}
+
+#[cfg(windows)]
+impl IntoRawSocket for UdpSocket {
+ fn into_raw_socket(self) -> RawSocket {
+ self.inner.into_inner().into_raw_socket()
+ }
+}
+
+#[cfg(windows)]
+impl AsRawSocket for UdpSocket {
+ fn as_raw_socket(&self) -> RawSocket {
+ self.inner.as_raw_socket()
+ }
+}
+
+#[cfg(windows)]
+impl FromRawSocket for UdpSocket {
+ /// Converts a `RawSocket` to a `UdpSocket`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_socket(socket: RawSocket) -> UdpSocket {
+ UdpSocket::from_std(FromRawSocket::from_raw_socket(socket))
+ }
+}
diff --git a/mio/src/net/uds/datagram.rs b/mio/src/net/uds/datagram.rs
new file mode 100644
index 0000000..e963d6e
--- /dev/null
+++ b/mio/src/net/uds/datagram.rs
@@ -0,0 +1,236 @@
+use crate::io_source::IoSource;
+use crate::{event, sys, Interest, Registry, Token};
+
+use std::net::Shutdown;
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+use std::os::unix::net;
+use std::path::Path;
+use std::{fmt, io};
+
+/// A Unix datagram socket.
+pub struct UnixDatagram {
+ inner: IoSource<net::UnixDatagram>,
+}
+
+impl UnixDatagram {
+ /// Creates a Unix datagram socket bound to the given path.
+ pub fn bind<P: AsRef<Path>>(path: P) -> io::Result<UnixDatagram> {
+ sys::uds::datagram::bind(path.as_ref()).map(UnixDatagram::from_std)
+ }
+
+ /// Creates a new `UnixDatagram` from a standard `net::UnixDatagram`.
+ ///
+ /// This function is intended to be used to wrap a Unix datagram from the
+ /// standard library in the Mio equivalent. The conversion assumes nothing
+ /// about the underlying datagram; it is left up to the user to set it in
+ /// non-blocking mode.
+ pub fn from_std(socket: net::UnixDatagram) -> UnixDatagram {
+ UnixDatagram {
+ inner: IoSource::new(socket),
+ }
+ }
+
+ /// Connects the socket to the specified address.
+ ///
+ /// This may return a `WouldBlock` in which case the socket connection
+ /// cannot be completed immediately.
+ pub fn connect<P: AsRef<Path>>(&self, path: P) -> io::Result<()> {
+ self.inner.connect(path)
+ }
+
+ /// Creates a Unix Datagram socket which is not bound to any address.
+ pub fn unbound() -> io::Result<UnixDatagram> {
+ sys::uds::datagram::unbound().map(UnixDatagram::from_std)
+ }
+
+ /// Create an unnamed pair of connected sockets.
+ pub fn pair() -> io::Result<(UnixDatagram, UnixDatagram)> {
+ sys::uds::datagram::pair().map(|(socket1, socket2)| {
+ (
+ UnixDatagram::from_std(socket1),
+ UnixDatagram::from_std(socket2),
+ )
+ })
+ }
+
+ /// Returns the address of this socket.
+ pub fn local_addr(&self) -> io::Result<sys::SocketAddr> {
+ sys::uds::datagram::local_addr(&self.inner)
+ }
+
+ /// Returns the address of this socket's peer.
+ ///
+ /// The `connect` method will connect the socket to a peer.
+ pub fn peer_addr(&self) -> io::Result<sys::SocketAddr> {
+ sys::uds::datagram::peer_addr(&self.inner)
+ }
+
+ /// Receives data from the socket.
+ ///
+ /// On success, returns the number of bytes read and the address from
+ /// whence the data came.
+ pub fn recv_from(&self, buf: &mut [u8]) -> io::Result<(usize, sys::SocketAddr)> {
+ self.inner
+ .do_io(|inner| sys::uds::datagram::recv_from(inner, buf))
+ }
+
+ /// Receives data from the socket.
+ ///
+ /// On success, returns the number of bytes read.
+ pub fn recv(&self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.do_io(|inner| inner.recv(buf))
+ }
+
+ /// Sends data on the socket to the specified address.
+ ///
+ /// On success, returns the number of bytes written.
+ pub fn send_to<P: AsRef<Path>>(&self, buf: &[u8], path: P) -> io::Result<usize> {
+ self.inner.do_io(|inner| inner.send_to(buf, path))
+ }
+
+ /// Sends data on the socket to the socket's peer.
+ ///
+ /// The peer address may be set by the `connect` method, and this method
+ /// will return an error if the socket has not already been connected.
+ ///
+ /// On success, returns the number of bytes written.
+ pub fn send(&self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.do_io(|inner| inner.send(buf))
+ }
+
+ /// Returns the value of the `SO_ERROR` option.
+ pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+ self.inner.take_error()
+ }
+
+ /// Shut down the read, write, or both halves of this connection.
+ ///
+ /// This function will cause all pending and future I/O calls on the
+ /// specified portions to immediately return with an appropriate value
+ /// (see the documentation of `Shutdown`).
+ pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
+ self.inner.shutdown(how)
+ }
+
+ /// Execute an I/O operation ensuring that the socket receives more events
+ /// if it hits a [`WouldBlock`] error.
+ ///
+ /// # Notes
+ ///
+ /// This method is required to be called for **all** I/O operations to
+ /// ensure the user will receive events once the socket is ready again after
+ /// returning a [`WouldBlock`] error.
+ ///
+ /// [`WouldBlock`]: io::ErrorKind::WouldBlock
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use std::io;
+ /// use std::os::unix::io::AsRawFd;
+ /// use mio::net::UnixDatagram;
+ ///
+ /// let (dgram1, dgram2) = UnixDatagram::pair()?;
+ ///
+ /// // Wait until the dgram is writable...
+ ///
+ /// // Write to the dgram using a direct libc call, of course the
+ /// // `io::Write` implementation would be easier to use.
+ /// let buf = b"hello";
+ /// let n = dgram1.try_io(|| {
+ /// let buf_ptr = &buf as *const _ as *const _;
+ /// let res = unsafe { libc::send(dgram1.as_raw_fd(), buf_ptr, buf.len(), 0) };
+ /// if res != -1 {
+ /// Ok(res as usize)
+ /// } else {
+ /// // If EAGAIN or EWOULDBLOCK is set by libc::send, the closure
+ /// // should return `WouldBlock` error.
+ /// Err(io::Error::last_os_error())
+ /// }
+ /// })?;
+ /// eprintln!("write {} bytes", n);
+ ///
+ /// // Wait until the dgram is readable...
+ ///
+ /// // Read from the dgram using a direct libc call, of course the
+ /// // `io::Read` implementation would be easier to use.
+ /// let mut buf = [0; 512];
+ /// let n = dgram2.try_io(|| {
+ /// let buf_ptr = &mut buf as *mut _ as *mut _;
+ /// let res = unsafe { libc::recv(dgram2.as_raw_fd(), buf_ptr, buf.len(), 0) };
+ /// if res != -1 {
+ /// Ok(res as usize)
+ /// } else {
+ /// // If EAGAIN or EWOULDBLOCK is set by libc::recv, the closure
+ /// // should return `WouldBlock` error.
+ /// Err(io::Error::last_os_error())
+ /// }
+ /// })?;
+ /// eprintln!("read {} bytes", n);
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn try_io<F, T>(&self, f: F) -> io::Result<T>
+ where
+ F: FnOnce() -> io::Result<T>,
+ {
+ self.inner.do_io(|_| f())
+ }
+}
+
+impl event::Source for UnixDatagram {
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.register(registry, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.reregister(registry, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ self.inner.deregister(registry)
+ }
+}
+
+impl fmt::Debug for UnixDatagram {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ self.inner.fmt(f)
+ }
+}
+
+impl IntoRawFd for UnixDatagram {
+ fn into_raw_fd(self) -> RawFd {
+ self.inner.into_inner().into_raw_fd()
+ }
+}
+
+impl AsRawFd for UnixDatagram {
+ fn as_raw_fd(&self) -> RawFd {
+ self.inner.as_raw_fd()
+ }
+}
+
+impl FromRawFd for UnixDatagram {
+ /// Converts a `RawFd` to a `UnixDatagram`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_fd(fd: RawFd) -> UnixDatagram {
+ UnixDatagram::from_std(FromRawFd::from_raw_fd(fd))
+ }
+}
diff --git a/mio/src/net/uds/listener.rs b/mio/src/net/uds/listener.rs
new file mode 100644
index 0000000..37e8106
--- /dev/null
+++ b/mio/src/net/uds/listener.rs
@@ -0,0 +1,104 @@
+use crate::io_source::IoSource;
+use crate::net::{SocketAddr, UnixStream};
+use crate::{event, sys, Interest, Registry, Token};
+
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+use std::os::unix::net;
+use std::path::Path;
+use std::{fmt, io};
+
+/// A non-blocking Unix domain socket server.
+pub struct UnixListener {
+ inner: IoSource<net::UnixListener>,
+}
+
+impl UnixListener {
+ /// Creates a new `UnixListener` bound to the specified socket.
+ pub fn bind<P: AsRef<Path>>(path: P) -> io::Result<UnixListener> {
+ sys::uds::listener::bind(path.as_ref()).map(UnixListener::from_std)
+ }
+
+ /// Creates a new `UnixListener` from a standard `net::UnixListener`.
+ ///
+ /// This function is intended to be used to wrap a Unix listener from the
+ /// standard library in the Mio equivalent. The conversion assumes nothing
+ /// about the underlying listener; it is left up to the user to set it in
+ /// non-blocking mode.
+ pub fn from_std(listener: net::UnixListener) -> UnixListener {
+ UnixListener {
+ inner: IoSource::new(listener),
+ }
+ }
+
+ /// Accepts a new incoming connection to this listener.
+ ///
+ /// The call is responsible for ensuring that the listening socket is in
+ /// non-blocking mode.
+ pub fn accept(&self) -> io::Result<(UnixStream, SocketAddr)> {
+ sys::uds::listener::accept(&self.inner)
+ }
+
+ /// Returns the local socket address of this listener.
+ pub fn local_addr(&self) -> io::Result<sys::SocketAddr> {
+ sys::uds::listener::local_addr(&self.inner)
+ }
+
+ /// Returns the value of the `SO_ERROR` option.
+ pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+ self.inner.take_error()
+ }
+}
+
+impl event::Source for UnixListener {
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.register(registry, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.reregister(registry, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ self.inner.deregister(registry)
+ }
+}
+
+impl fmt::Debug for UnixListener {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ self.inner.fmt(f)
+ }
+}
+
+impl IntoRawFd for UnixListener {
+ fn into_raw_fd(self) -> RawFd {
+ self.inner.into_inner().into_raw_fd()
+ }
+}
+
+impl AsRawFd for UnixListener {
+ fn as_raw_fd(&self) -> RawFd {
+ self.inner.as_raw_fd()
+ }
+}
+
+impl FromRawFd for UnixListener {
+ /// Converts a `RawFd` to a `UnixListener`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_fd(fd: RawFd) -> UnixListener {
+ UnixListener::from_std(FromRawFd::from_raw_fd(fd))
+ }
+}
diff --git a/mio/src/net/uds/mod.rs b/mio/src/net/uds/mod.rs
new file mode 100644
index 0000000..6b4ffdc
--- /dev/null
+++ b/mio/src/net/uds/mod.rs
@@ -0,0 +1,10 @@
+mod datagram;
+pub use self::datagram::UnixDatagram;
+
+mod listener;
+pub use self::listener::UnixListener;
+
+mod stream;
+pub use self::stream::UnixStream;
+
+pub use crate::sys::SocketAddr;
diff --git a/mio/src/net/uds/stream.rs b/mio/src/net/uds/stream.rs
new file mode 100644
index 0000000..b38812e
--- /dev/null
+++ b/mio/src/net/uds/stream.rs
@@ -0,0 +1,245 @@
+use crate::io_source::IoSource;
+use crate::{event, sys, Interest, Registry, Token};
+
+use std::fmt;
+use std::io::{self, IoSlice, IoSliceMut, Read, Write};
+use std::net::Shutdown;
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+use std::os::unix::net;
+use std::path::Path;
+
+/// A non-blocking Unix stream socket.
+pub struct UnixStream {
+ inner: IoSource<net::UnixStream>,
+}
+
+impl UnixStream {
+ /// Connects to the socket named by `path`.
+ ///
+ /// This may return a `WouldBlock` in which case the socket connection
+ /// cannot be completed immediately. Usually it means the backlog is full.
+ pub fn connect<P: AsRef<Path>>(path: P) -> io::Result<UnixStream> {
+ sys::uds::stream::connect(path.as_ref()).map(UnixStream::from_std)
+ }
+
+ /// Creates a new `UnixStream` from a standard `net::UnixStream`.
+ ///
+ /// This function is intended to be used to wrap a Unix stream from the
+ /// standard library in the Mio equivalent. The conversion assumes nothing
+ /// about the underlying stream; it is left up to the user to set it in
+ /// non-blocking mode.
+ ///
+ /// # Note
+ ///
+ /// The Unix stream here will not have `connect` called on it, so it
+ /// should already be connected via some other means (be it manually, or
+ /// the standard library).
+ pub fn from_std(stream: net::UnixStream) -> UnixStream {
+ UnixStream {
+ inner: IoSource::new(stream),
+ }
+ }
+
+ /// Creates an unnamed pair of connected sockets.
+ ///
+ /// Returns two `UnixStream`s which are connected to each other.
+ pub fn pair() -> io::Result<(UnixStream, UnixStream)> {
+ sys::uds::stream::pair().map(|(stream1, stream2)| {
+ (UnixStream::from_std(stream1), UnixStream::from_std(stream2))
+ })
+ }
+
+ /// Returns the socket address of the local half of this connection.
+ pub fn local_addr(&self) -> io::Result<sys::SocketAddr> {
+ sys::uds::stream::local_addr(&self.inner)
+ }
+
+ /// Returns the socket address of the remote half of this connection.
+ pub fn peer_addr(&self) -> io::Result<sys::SocketAddr> {
+ sys::uds::stream::peer_addr(&self.inner)
+ }
+
+ /// Returns the value of the `SO_ERROR` option.
+ pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+ self.inner.take_error()
+ }
+
+ /// Shuts down the read, write, or both halves of this connection.
+ ///
+ /// This function will cause all pending and future I/O calls on the
+ /// specified portions to immediately return with an appropriate value
+ /// (see the documentation of `Shutdown`).
+ pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
+ self.inner.shutdown(how)
+ }
+
+ /// Execute an I/O operation ensuring that the socket receives more events
+ /// if it hits a [`WouldBlock`] error.
+ ///
+ /// # Notes
+ ///
+ /// This method is required to be called for **all** I/O operations to
+ /// ensure the user will receive events once the socket is ready again after
+ /// returning a [`WouldBlock`] error.
+ ///
+ /// [`WouldBlock`]: io::ErrorKind::WouldBlock
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use std::io;
+ /// use std::os::unix::io::AsRawFd;
+ /// use mio::net::UnixStream;
+ ///
+ /// let (stream1, stream2) = UnixStream::pair()?;
+ ///
+ /// // Wait until the stream is writable...
+ ///
+ /// // Write to the stream using a direct libc call, of course the
+ /// // `io::Write` implementation would be easier to use.
+ /// let buf = b"hello";
+ /// let n = stream1.try_io(|| {
+ /// let buf_ptr = &buf as *const _ as *const _;
+ /// let res = unsafe { libc::send(stream1.as_raw_fd(), buf_ptr, buf.len(), 0) };
+ /// if res != -1 {
+ /// Ok(res as usize)
+ /// } else {
+ /// // If EAGAIN or EWOULDBLOCK is set by libc::send, the closure
+ /// // should return `WouldBlock` error.
+ /// Err(io::Error::last_os_error())
+ /// }
+ /// })?;
+ /// eprintln!("write {} bytes", n);
+ ///
+ /// // Wait until the stream is readable...
+ ///
+ /// // Read from the stream using a direct libc call, of course the
+ /// // `io::Read` implementation would be easier to use.
+ /// let mut buf = [0; 512];
+ /// let n = stream2.try_io(|| {
+ /// let buf_ptr = &mut buf as *mut _ as *mut _;
+ /// let res = unsafe { libc::recv(stream2.as_raw_fd(), buf_ptr, buf.len(), 0) };
+ /// if res != -1 {
+ /// Ok(res as usize)
+ /// } else {
+ /// // If EAGAIN or EWOULDBLOCK is set by libc::recv, the closure
+ /// // should return `WouldBlock` error.
+ /// Err(io::Error::last_os_error())
+ /// }
+ /// })?;
+ /// eprintln!("read {} bytes", n);
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn try_io<F, T>(&self, f: F) -> io::Result<T>
+ where
+ F: FnOnce() -> io::Result<T>,
+ {
+ self.inner.do_io(|_| f())
+ }
+}
+
+impl Read for UnixStream {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.read(buf))
+ }
+
+ fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.read_vectored(bufs))
+ }
+}
+
+impl<'a> Read for &'a UnixStream {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.read(buf))
+ }
+
+ fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.read_vectored(bufs))
+ }
+}
+
+impl Write for UnixStream {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.write(buf))
+ }
+
+ fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.write_vectored(bufs))
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.do_io(|mut inner| inner.flush())
+ }
+}
+
+impl<'a> Write for &'a UnixStream {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.write(buf))
+ }
+
+ fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut inner| inner.write_vectored(bufs))
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.do_io(|mut inner| inner.flush())
+ }
+}
+
+impl event::Source for UnixStream {
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.register(registry, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.reregister(registry, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ self.inner.deregister(registry)
+ }
+}
+
+impl fmt::Debug for UnixStream {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ self.inner.fmt(f)
+ }
+}
+
+impl IntoRawFd for UnixStream {
+ fn into_raw_fd(self) -> RawFd {
+ self.inner.into_inner().into_raw_fd()
+ }
+}
+
+impl AsRawFd for UnixStream {
+ fn as_raw_fd(&self) -> RawFd {
+ self.inner.as_raw_fd()
+ }
+}
+
+impl FromRawFd for UnixStream {
+ /// Converts a `RawFd` to a `UnixStream`.
+ ///
+ /// # Notes
+ ///
+ /// The caller is responsible for ensuring that the socket is in
+ /// non-blocking mode.
+ unsafe fn from_raw_fd(fd: RawFd) -> UnixStream {
+ UnixStream::from_std(FromRawFd::from_raw_fd(fd))
+ }
+}
diff --git a/mio/src/poll.rs b/mio/src/poll.rs
new file mode 100644
index 0000000..289d668
--- /dev/null
+++ b/mio/src/poll.rs
@@ -0,0 +1,714 @@
+use crate::{event, sys, Events, Interest, Token};
+use log::trace;
+#[cfg(unix)]
+use std::os::unix::io::{AsRawFd, RawFd};
+use std::time::Duration;
+use std::{fmt, io};
+
+/// Polls for readiness events on all registered values.
+///
+/// `Poll` allows a program to monitor a large number of [`event::Source`]s,
+/// waiting until one or more become "ready" for some class of operations; e.g.
+/// reading and writing. An event source is considered ready if it is possible
+/// to immediately perform a corresponding operation; e.g. [`read`] or
+/// [`write`].
+///
+/// To use `Poll`, an `event::Source` must first be registered with the `Poll`
+/// instance using the [`register`] method on its associated `Register`,
+/// supplying readiness interest. The readiness interest tells `Poll` which
+/// specific operations on the handle to monitor for readiness. A `Token` is
+/// also passed to the [`register`] function. When `Poll` returns a readiness
+/// event, it will include this token. This associates the event with the
+/// event source that generated the event.
+///
+/// [`event::Source`]: ./event/trait.Source.html
+/// [`read`]: ./net/struct.TcpStream.html#method.read
+/// [`write`]: ./net/struct.TcpStream.html#method.write
+/// [`register`]: struct.Registry.html#method.register
+///
+/// # Examples
+///
+/// A basic example -- establishing a `TcpStream` connection.
+///
+#[cfg_attr(all(feature = "os-poll", feature = "net"), doc = "```")]
+#[cfg_attr(not(all(feature = "os-poll", feature = "net")), doc = "```ignore")]
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Events, Poll, Interest, Token};
+/// use mio::net::TcpStream;
+///
+/// use std::net::{self, SocketAddr};
+///
+/// // Bind a server socket to connect to.
+/// let addr: SocketAddr = "127.0.0.1:0".parse()?;
+/// let server = net::TcpListener::bind(addr)?;
+///
+/// // Construct a new `Poll` handle as well as the `Events` we'll store into
+/// let mut poll = Poll::new()?;
+/// let mut events = Events::with_capacity(1024);
+///
+/// // Connect the stream
+/// let mut stream = TcpStream::connect(server.local_addr()?)?;
+///
+/// // Register the stream with `Poll`
+/// poll.registry().register(&mut stream, Token(0), Interest::READABLE | Interest::WRITABLE)?;
+///
+/// // Wait for the socket to become ready. This has to happens in a loop to
+/// // handle spurious wakeups.
+/// loop {
+/// poll.poll(&mut events, None)?;
+///
+/// for event in &events {
+/// if event.token() == Token(0) && event.is_writable() {
+/// // The socket connected (probably, it could still be a spurious
+/// // wakeup)
+/// return Ok(());
+/// }
+/// }
+/// }
+/// # }
+/// ```
+///
+/// # Portability
+///
+/// Using `Poll` provides a portable interface across supported platforms as
+/// long as the caller takes the following into consideration:
+///
+/// ### Spurious events
+///
+/// [`Poll::poll`] may return readiness events even if the associated
+/// event source is not actually ready. Given the same code, this may
+/// happen more on some platforms than others. It is important to never assume
+/// that, just because a readiness event was received, that the associated
+/// operation will succeed as well.
+///
+/// If operation fails with [`WouldBlock`], then the caller should not treat
+/// this as an error, but instead should wait until another readiness event is
+/// received.
+///
+/// ### Draining readiness
+///
+/// Once a readiness event is received, the corresponding operation must be
+/// performed repeatedly until it returns [`WouldBlock`]. Unless this is done,
+/// there is no guarantee that another readiness event will be delivered, even
+/// if further data is received for the event source.
+///
+/// [`WouldBlock`]: std::io::ErrorKind::WouldBlock
+///
+/// ### Readiness operations
+///
+/// The only readiness operations that are guaranteed to be present on all
+/// supported platforms are [`readable`] and [`writable`]. All other readiness
+/// operations may have false negatives and as such should be considered
+/// **hints**. This means that if a socket is registered with [`readable`]
+/// interest and either an error or close is received, a readiness event will
+/// be generated for the socket, but it **may** only include `readable`
+/// readiness. Also note that, given the potential for spurious events,
+/// receiving a readiness event with `read_closed`, `write_closed`, or `error`
+/// doesn't actually mean that a `read` on the socket will return a result
+/// matching the readiness event.
+///
+/// In other words, portable programs that explicitly check for [`read_closed`],
+/// [`write_closed`], or [`error`] readiness should be doing so as an
+/// **optimization** and always be able to handle an error or close situation
+/// when performing the actual read operation.
+///
+/// [`readable`]: ./event/struct.Event.html#method.is_readable
+/// [`writable`]: ./event/struct.Event.html#method.is_writable
+/// [`error`]: ./event/struct.Event.html#method.is_error
+/// [`read_closed`]: ./event/struct.Event.html#method.is_read_closed
+/// [`write_closed`]: ./event/struct.Event.html#method.is_write_closed
+///
+/// ### Registering handles
+///
+/// Unless otherwise noted, it should be assumed that types implementing
+/// [`event::Source`] will never become ready unless they are registered with
+/// `Poll`.
+///
+/// For example:
+///
+#[cfg_attr(all(feature = "os-poll", feature = "net"), doc = "```")]
+#[cfg_attr(not(all(feature = "os-poll", feature = "net")), doc = "```ignore")]
+/// # use std::error::Error;
+/// # use std::net;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Poll, Interest, Token};
+/// use mio::net::TcpStream;
+/// use std::net::SocketAddr;
+/// use std::time::Duration;
+/// use std::thread;
+///
+/// let address: SocketAddr = "127.0.0.1:0".parse()?;
+/// let listener = net::TcpListener::bind(address)?;
+/// let mut sock = TcpStream::connect(listener.local_addr()?)?;
+///
+/// thread::sleep(Duration::from_secs(1));
+///
+/// let poll = Poll::new()?;
+///
+/// // The connect is not guaranteed to have started until it is registered at
+/// // this point
+/// poll.registry().register(&mut sock, Token(0), Interest::READABLE | Interest::WRITABLE)?;
+/// # Ok(())
+/// # }
+/// ```
+///
+/// ### Dropping `Poll`
+///
+/// When the `Poll` instance is dropped it may cancel in-flight operations for
+/// the registered [event sources], meaning that no further events for them may
+/// be received. It also means operations on the registered event sources may no
+/// longer work. It is up to the user to keep the `Poll` instance alive while
+/// registered event sources are being used.
+///
+/// [event sources]: ./event/trait.Source.html
+///
+/// ### Accessing raw fd/socket/handle
+///
+/// Mio makes it possible for many types to be converted into a raw file
+/// descriptor (fd, Unix), socket (Windows) or handle (Windows). This makes it
+/// possible to support more operations on the type than Mio supports, for
+/// example it makes [mio-aio] possible. However accessing the raw fd is not
+/// without it's pitfalls.
+///
+/// Specifically performing I/O operations outside of Mio on these types (via
+/// the raw fd) has unspecified behaviour. It could cause no more events to be
+/// generated for the type even though it returned `WouldBlock` (in an operation
+/// directly accessing the fd). The behaviour is OS specific and Mio can only
+/// guarantee cross-platform behaviour if it can control the I/O.
+///
+/// [mio-aio]: https://github.com/asomers/mio-aio
+///
+/// *The following is **not** guaranteed, just a description of the current
+/// situation!* Mio is allowed to change the following without it being considered
+/// a breaking change, don't depend on this, it's just here to inform the user.
+/// Currently the kqueue and epoll implementation support direct I/O operations
+/// on the fd without Mio's knowledge. Windows however needs **all** I/O
+/// operations to go through Mio otherwise it is not able to update it's
+/// internal state properly and won't generate events.
+///
+/// ### Polling without registering event sources
+///
+///
+/// *The following is **not** guaranteed, just a description of the current
+/// situation!* Mio is allowed to change the following without it being
+/// considered a breaking change, don't depend on this, it's just here to inform
+/// the user. On platforms that use epoll, kqueue or IOCP (see implementation
+/// notes below) polling without previously registering [event sources] will
+/// result in sleeping forever, only a process signal will be able to wake up
+/// the thread.
+///
+/// On WASM/WASI this is different as it doesn't support process signals,
+/// furthermore the WASI specification doesn't specify a behaviour in this
+/// situation, thus it's up to the implementation what to do here. As an
+/// example, the wasmtime runtime will return `EINVAL` in this situation, but
+/// different runtimes may return different results. If you have further
+/// insights or thoughts about this situation (and/or how Mio should handle it)
+/// please add you comment to [pull request#1580].
+///
+/// [event sources]: crate::event::Source
+/// [pull request#1580]: https://github.com/tokio-rs/mio/pull/1580
+///
+/// # Implementation notes
+///
+/// `Poll` is backed by the selector provided by the operating system.
+///
+/// | OS | Selector |
+/// |---------------|-----------|
+/// | Android | [epoll] |
+/// | DragonFly BSD | [kqueue] |
+/// | FreeBSD | [kqueue] |
+/// | iOS | [kqueue] |
+/// | illumos | [epoll] |
+/// | Linux | [epoll] |
+/// | NetBSD | [kqueue] |
+/// | OpenBSD | [kqueue] |
+/// | Windows | [IOCP] |
+/// | macOS | [kqueue] |
+///
+/// On all supported platforms, socket operations are handled by using the
+/// system selector. Platform specific extensions (e.g. [`SourceFd`]) allow
+/// accessing other features provided by individual system selectors. For
+/// example, Linux's [`signalfd`] feature can be used by registering the FD with
+/// `Poll` via [`SourceFd`].
+///
+/// On all platforms except windows, a call to [`Poll::poll`] is mostly just a
+/// direct call to the system selector. However, [IOCP] uses a completion model
+/// instead of a readiness model. In this case, `Poll` must adapt the completion
+/// model Mio's API. While non-trivial, the bridge layer is still quite
+/// efficient. The most expensive part being calls to `read` and `write` require
+/// data to be copied into an intermediate buffer before it is passed to the
+/// kernel.
+///
+/// [epoll]: https://man7.org/linux/man-pages/man7/epoll.7.html
+/// [kqueue]: https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
+/// [IOCP]: https://docs.microsoft.com/en-us/windows/win32/fileio/i-o-completion-ports
+/// [`signalfd`]: https://man7.org/linux/man-pages/man2/signalfd.2.html
+/// [`SourceFd`]: unix/struct.SourceFd.html
+/// [`Poll::poll`]: struct.Poll.html#method.poll
+pub struct Poll {
+ registry: Registry,
+}
+
+/// Registers I/O resources.
+pub struct Registry {
+ selector: sys::Selector,
+}
+
+impl Poll {
+ cfg_os_poll! {
+ /// Return a new `Poll` handle.
+ ///
+ /// This function will make a syscall to the operating system to create
+ /// the system selector. If this syscall fails, `Poll::new` will return
+ /// with the error.
+ ///
+ /// close-on-exec flag is set on the file descriptors used by the selector to prevent
+ /// leaking it to executed processes. However, on some systems such as
+ /// old Linux systems that don't support `epoll_create1` syscall it is done
+ /// non-atomically, so a separate thread executing in parallel to this
+ /// function may accidentally leak the file descriptor if it executes a
+ /// new process before this function returns.
+ ///
+ /// See [struct] level docs for more details.
+ ///
+ /// [struct]: struct.Poll.html
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// # use std::error::Error;
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::{Poll, Events};
+ /// use std::time::Duration;
+ ///
+ /// let mut poll = match Poll::new() {
+ /// Ok(poll) => poll,
+ /// Err(e) => panic!("failed to create Poll instance; err={:?}", e),
+ /// };
+ ///
+ /// // Create a structure to receive polled events
+ /// let mut events = Events::with_capacity(1024);
+ ///
+ /// // Wait for events, but none will be received because no
+ /// // `event::Source`s have been registered with this `Poll` instance.
+ /// poll.poll(&mut events, Some(Duration::from_millis(500)))?;
+ /// assert!(events.is_empty());
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn new() -> io::Result<Poll> {
+ sys::Selector::new().map(|selector| Poll {
+ registry: Registry { selector },
+ })
+ }
+ }
+
+ /// Create a separate `Registry` which can be used to register
+ /// `event::Source`s.
+ pub fn registry(&self) -> &Registry {
+ &self.registry
+ }
+
+ /// Wait for readiness events
+ ///
+ /// Blocks the current thread and waits for readiness events for any of the
+ /// [`event::Source`]s that have been registered with this `Poll` instance.
+ /// The function will block until either at least one readiness event has
+ /// been received or `timeout` has elapsed. A `timeout` of `None` means that
+ /// `poll` will block until a readiness event has been received.
+ ///
+ /// The supplied `events` will be cleared and newly received readiness events
+ /// will be pushed onto the end. At most `events.capacity()` events will be
+ /// returned. If there are further pending readiness events, they will be
+ /// returned on the next call to `poll`.
+ ///
+ /// A single call to `poll` may result in multiple readiness events being
+ /// returned for a single event source. For example, if a TCP socket becomes
+ /// both readable and writable, it may be possible for a single readiness
+ /// event to be returned with both [`readable`] and [`writable`] readiness
+ /// **OR** two separate events may be returned, one with [`readable`] set
+ /// and one with [`writable`] set.
+ ///
+ /// Note that the `timeout` will be rounded up to the system clock
+ /// granularity (usually 1ms), and kernel scheduling delays mean that
+ /// the blocking interval may be overrun by a small amount.
+ ///
+ /// See the [struct] level documentation for a higher level discussion of
+ /// polling.
+ ///
+ /// [`event::Source`]: ./event/trait.Source.html
+ /// [`readable`]: struct.Interest.html#associatedconstant.READABLE
+ /// [`writable`]: struct.Interest.html#associatedconstant.WRITABLE
+ /// [struct]: struct.Poll.html
+ /// [`iter`]: ./event/struct.Events.html#method.iter
+ ///
+ /// # Notes
+ ///
+ /// This returns any errors without attempting to retry, previous versions
+ /// of Mio would automatically retry the poll call if it was interrupted
+ /// (if `EINTR` was returned).
+ ///
+ /// Currently if the `timeout` elapses without any readiness events
+ /// triggering this will return `Ok(())`. However we're not guaranteeing
+ /// this behaviour as this depends on the OS.
+ ///
+ /// # Examples
+ ///
+ /// A basic example -- establishing a `TcpStream` connection.
+ ///
+ #[cfg_attr(all(feature = "os-poll", feature = "net"), doc = "```")]
+ #[cfg_attr(not(all(feature = "os-poll", feature = "net")), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::{Events, Poll, Interest, Token};
+ /// use mio::net::TcpStream;
+ ///
+ /// use std::net::{TcpListener, SocketAddr};
+ /// use std::thread;
+ ///
+ /// // Bind a server socket to connect to.
+ /// let addr: SocketAddr = "127.0.0.1:0".parse()?;
+ /// let server = TcpListener::bind(addr)?;
+ /// let addr = server.local_addr()?.clone();
+ ///
+ /// // Spawn a thread to accept the socket
+ /// thread::spawn(move || {
+ /// let _ = server.accept();
+ /// });
+ ///
+ /// // Construct a new `Poll` handle as well as the `Events` we'll store into
+ /// let mut poll = Poll::new()?;
+ /// let mut events = Events::with_capacity(1024);
+ ///
+ /// // Connect the stream
+ /// let mut stream = TcpStream::connect(addr)?;
+ ///
+ /// // Register the stream with `Poll`
+ /// poll.registry().register(
+ /// &mut stream,
+ /// Token(0),
+ /// Interest::READABLE | Interest::WRITABLE)?;
+ ///
+ /// // Wait for the socket to become ready. This has to happens in a loop to
+ /// // handle spurious wakeups.
+ /// loop {
+ /// poll.poll(&mut events, None)?;
+ ///
+ /// for event in &events {
+ /// if event.token() == Token(0) && event.is_writable() {
+ /// // The socket connected (probably, it could still be a spurious
+ /// // wakeup)
+ /// return Ok(());
+ /// }
+ /// }
+ /// }
+ /// # }
+ /// ```
+ ///
+ /// [struct]: #
+ pub fn poll(&mut self, events: &mut Events, timeout: Option<Duration>) -> io::Result<()> {
+ self.registry.selector.select(events.sys(), timeout)
+ }
+}
+
+#[cfg(unix)]
+impl AsRawFd for Poll {
+ fn as_raw_fd(&self) -> RawFd {
+ self.registry.as_raw_fd()
+ }
+}
+
+impl fmt::Debug for Poll {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt.debug_struct("Poll").finish()
+ }
+}
+
+impl Registry {
+ /// Register an [`event::Source`] with the `Poll` instance.
+ ///
+ /// Once registered, the `Poll` instance will monitor the event source for
+ /// readiness state changes. When it notices a state change, it will return
+ /// a readiness event for the handle the next time [`poll`] is called.
+ ///
+ /// See [`Poll`] docs for a high level overview.
+ ///
+ /// # Arguments
+ ///
+ /// `source: &mut S: event::Source`: This is the source of events that the
+ /// `Poll` instance should monitor for readiness state changes.
+ ///
+ /// `token: Token`: The caller picks a token to associate with the socket.
+ /// When [`poll`] returns an event for the handle, this token is included.
+ /// This allows the caller to map the event to its source. The token
+ /// associated with the `event::Source` can be changed at any time by
+ /// calling [`reregister`].
+ ///
+ /// See documentation on [`Token`] for an example showing how to pick
+ /// [`Token`] values.
+ ///
+ /// `interest: Interest`: Specifies which operations `Poll` should monitor
+ /// for readiness. `Poll` will only return readiness events for operations
+ /// specified by this argument.
+ ///
+ /// If a socket is registered with readable interest and the socket becomes
+ /// writable, no event will be returned from [`poll`].
+ ///
+ /// The readiness interest for an `event::Source` can be changed at any time
+ /// by calling [`reregister`].
+ ///
+ /// # Notes
+ ///
+ /// Callers must ensure that if a source being registered with a `Poll`
+ /// instance was previously registered with that `Poll` instance, then a
+ /// call to [`deregister`] has already occurred. Consecutive calls to
+ /// `register` is unspecified behavior.
+ ///
+ /// Unless otherwise specified, the caller should assume that once an event
+ /// source is registered with a `Poll` instance, it is bound to that `Poll`
+ /// instance for the lifetime of the event source. This remains true even
+ /// if the event source is deregistered from the poll instance using
+ /// [`deregister`].
+ ///
+ /// [`event::Source`]: ./event/trait.Source.html
+ /// [`poll`]: struct.Poll.html#method.poll
+ /// [`reregister`]: struct.Registry.html#method.reregister
+ /// [`deregister`]: struct.Registry.html#method.deregister
+ /// [`Token`]: struct.Token.html
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(all(feature = "os-poll", feature = "net"), doc = "```")]
+ #[cfg_attr(not(all(feature = "os-poll", feature = "net")), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// # use std::net;
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::{Events, Poll, Interest, Token};
+ /// use mio::net::TcpStream;
+ /// use std::net::SocketAddr;
+ /// use std::time::{Duration, Instant};
+ ///
+ /// let mut poll = Poll::new()?;
+ ///
+ /// let address: SocketAddr = "127.0.0.1:0".parse()?;
+ /// let listener = net::TcpListener::bind(address)?;
+ /// let mut socket = TcpStream::connect(listener.local_addr()?)?;
+ ///
+ /// // Register the socket with `poll`
+ /// poll.registry().register(
+ /// &mut socket,
+ /// Token(0),
+ /// Interest::READABLE | Interest::WRITABLE)?;
+ ///
+ /// let mut events = Events::with_capacity(1024);
+ /// let start = Instant::now();
+ /// let timeout = Duration::from_millis(500);
+ ///
+ /// loop {
+ /// let elapsed = start.elapsed();
+ ///
+ /// if elapsed >= timeout {
+ /// // Connection timed out
+ /// return Ok(());
+ /// }
+ ///
+ /// let remaining = timeout - elapsed;
+ /// poll.poll(&mut events, Some(remaining))?;
+ ///
+ /// for event in &events {
+ /// if event.token() == Token(0) {
+ /// // Something (probably) happened on the socket.
+ /// return Ok(());
+ /// }
+ /// }
+ /// }
+ /// # }
+ /// ```
+ pub fn register<S>(&self, source: &mut S, token: Token, interests: Interest) -> io::Result<()>
+ where
+ S: event::Source + ?Sized,
+ {
+ trace!(
+ "registering event source with poller: token={:?}, interests={:?}",
+ token,
+ interests
+ );
+ source.register(self, token, interests)
+ }
+
+ /// Re-register an [`event::Source`] with the `Poll` instance.
+ ///
+ /// Re-registering an event source allows changing the details of the
+ /// registration. Specifically, it allows updating the associated `token`
+ /// and `interests` specified in previous `register` and `reregister` calls.
+ ///
+ /// The `reregister` arguments fully override the previous values. In other
+ /// words, if a socket is registered with [`readable`] interest and the call
+ /// to `reregister` specifies [`writable`], then read interest is no longer
+ /// requested for the handle.
+ ///
+ /// The event source must have previously been registered with this instance
+ /// of `Poll`, otherwise the behavior is unspecified.
+ ///
+ /// See the [`register`] documentation for details about the function
+ /// arguments and see the [`struct`] docs for a high level overview of
+ /// polling.
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(all(feature = "os-poll", feature = "net"), doc = "```")]
+ #[cfg_attr(not(all(feature = "os-poll", feature = "net")), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// # use std::net;
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::{Poll, Interest, Token};
+ /// use mio::net::TcpStream;
+ /// use std::net::SocketAddr;
+ ///
+ /// let poll = Poll::new()?;
+ ///
+ /// let address: SocketAddr = "127.0.0.1:0".parse()?;
+ /// let listener = net::TcpListener::bind(address)?;
+ /// let mut socket = TcpStream::connect(listener.local_addr()?)?;
+ ///
+ /// // Register the socket with `poll`, requesting readable
+ /// poll.registry().register(
+ /// &mut socket,
+ /// Token(0),
+ /// Interest::READABLE)?;
+ ///
+ /// // Reregister the socket specifying write interest instead. Even though
+ /// // the token is the same it must be specified.
+ /// poll.registry().reregister(
+ /// &mut socket,
+ /// Token(0),
+ /// Interest::WRITABLE)?;
+ /// # Ok(())
+ /// # }
+ /// ```
+ ///
+ /// [`event::Source`]: ./event/trait.Source.html
+ /// [`struct`]: struct.Poll.html
+ /// [`register`]: struct.Registry.html#method.register
+ /// [`readable`]: ./event/struct.Event.html#is_readable
+ /// [`writable`]: ./event/struct.Event.html#is_writable
+ pub fn reregister<S>(&self, source: &mut S, token: Token, interests: Interest) -> io::Result<()>
+ where
+ S: event::Source + ?Sized,
+ {
+ trace!(
+ "reregistering event source with poller: token={:?}, interests={:?}",
+ token,
+ interests
+ );
+ source.reregister(self, token, interests)
+ }
+
+ /// Deregister an [`event::Source`] with the `Poll` instance.
+ ///
+ /// When an event source is deregistered, the `Poll` instance will no longer
+ /// monitor it for readiness state changes. Deregistering clears up any
+ /// internal resources needed to track the handle. After an explicit call
+ /// to this method completes, it is guaranteed that the token previously
+ /// registered to this handle will not be returned by a future poll, so long
+ /// as a happens-before relationship is established between this call and
+ /// the poll.
+ ///
+ /// The event source must have previously been registered with this instance
+ /// of `Poll`, otherwise the behavior is unspecified.
+ ///
+ /// A handle can be passed back to `register` after it has been
+ /// deregistered; however, it must be passed back to the **same** `Poll`
+ /// instance, otherwise the behavior is unspecified.
+ ///
+ /// # Examples
+ ///
+ #[cfg_attr(all(feature = "os-poll", feature = "net"), doc = "```")]
+ #[cfg_attr(not(all(feature = "os-poll", feature = "net")), doc = "```ignore")]
+ /// # use std::error::Error;
+ /// # use std::net;
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use mio::{Events, Poll, Interest, Token};
+ /// use mio::net::TcpStream;
+ /// use std::net::SocketAddr;
+ /// use std::time::Duration;
+ ///
+ /// let mut poll = Poll::new()?;
+ ///
+ /// let address: SocketAddr = "127.0.0.1:0".parse()?;
+ /// let listener = net::TcpListener::bind(address)?;
+ /// let mut socket = TcpStream::connect(listener.local_addr()?)?;
+ ///
+ /// // Register the socket with `poll`
+ /// poll.registry().register(
+ /// &mut socket,
+ /// Token(0),
+ /// Interest::READABLE)?;
+ ///
+ /// poll.registry().deregister(&mut socket)?;
+ ///
+ /// let mut events = Events::with_capacity(1024);
+ ///
+ /// // Set a timeout because this poll should never receive any events.
+ /// poll.poll(&mut events, Some(Duration::from_secs(1)))?;
+ /// assert!(events.is_empty());
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn deregister<S>(&self, source: &mut S) -> io::Result<()>
+ where
+ S: event::Source + ?Sized,
+ {
+ trace!("deregistering event source from poller");
+ source.deregister(self)
+ }
+
+ /// Creates a new independently owned `Registry`.
+ ///
+ /// Event sources registered with this `Registry` will be registered with
+ /// the original `Registry` and `Poll` instance.
+ pub fn try_clone(&self) -> io::Result<Registry> {
+ self.selector
+ .try_clone()
+ .map(|selector| Registry { selector })
+ }
+
+ /// Internal check to ensure only a single `Waker` is active per [`Poll`]
+ /// instance.
+ #[cfg(all(debug_assertions, not(target_os = "wasi")))]
+ pub(crate) fn register_waker(&self) {
+ assert!(
+ !self.selector.register_waker(),
+ "Only a single `Waker` can be active per `Poll` instance"
+ );
+ }
+
+ /// Get access to the `sys::Selector`.
+ #[cfg(any(not(target_os = "wasi"), feature = "net"))]
+ pub(crate) fn selector(&self) -> &sys::Selector {
+ &self.selector
+ }
+}
+
+impl fmt::Debug for Registry {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt.debug_struct("Registry").finish()
+ }
+}
+
+#[cfg(unix)]
+impl AsRawFd for Registry {
+ fn as_raw_fd(&self) -> RawFd {
+ self.selector.as_raw_fd()
+ }
+}
+
+cfg_os_poll! {
+ #[cfg(unix)]
+ #[test]
+ pub fn as_raw_fd() {
+ let poll = Poll::new().unwrap();
+ assert!(poll.as_raw_fd() > 0);
+ }
+}
diff --git a/mio/src/sys/mod.rs b/mio/src/sys/mod.rs
new file mode 100644
index 0000000..2a968b2
--- /dev/null
+++ b/mio/src/sys/mod.rs
@@ -0,0 +1,86 @@
+//! Module with system specific types.
+//!
+//! Required types:
+//!
+//! * `Event`: a type alias for the system specific event, e.g. `kevent` or
+//! `epoll_event`.
+//! * `event`: a module with various helper functions for `Event`, see
+//! [`crate::event::Event`] for the required functions.
+//! * `Events`: collection of `Event`s, see [`crate::Events`].
+//! * `IoSourceState`: state for the `IoSource` type.
+//! * `Selector`: selector used to register event sources and poll for events,
+//! see [`crate::Poll`] and [`crate::Registry`] for required
+//! methods.
+//! * `tcp` and `udp` modules: see the [`crate::net`] module.
+//! * `Waker`: see [`crate::Waker`].
+
+cfg_os_poll! {
+ macro_rules! debug_detail {
+ (
+ $type: ident ($event_type: ty), $test: path,
+ $($(#[$target: meta])* $libc: ident :: $flag: ident),+ $(,)*
+ ) => {
+ struct $type($event_type);
+
+ impl fmt::Debug for $type {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ let mut written_one = false;
+ $(
+ $(#[$target])*
+ #[allow(clippy::bad_bit_mask)] // Apparently some flags are zero.
+ {
+ // Windows doesn't use `libc` but the `afd` module.
+ if $test(&self.0, &$libc :: $flag) {
+ if !written_one {
+ write!(f, "{}", stringify!($flag))?;
+ written_one = true;
+ } else {
+ write!(f, "|{}", stringify!($flag))?;
+ }
+ }
+ }
+ )+
+ if !written_one {
+ write!(f, "(empty)")
+ } else {
+ Ok(())
+ }
+ }
+ }
+ };
+ }
+}
+
+#[cfg(unix)]
+cfg_os_poll! {
+ mod unix;
+ pub use self::unix::*;
+}
+
+#[cfg(windows)]
+cfg_os_poll! {
+ mod windows;
+ pub use self::windows::*;
+}
+
+#[cfg(target_os = "wasi")]
+cfg_os_poll! {
+ mod wasi;
+ pub(crate) use self::wasi::*;
+}
+
+cfg_not_os_poll! {
+ mod shell;
+ pub(crate) use self::shell::*;
+
+ #[cfg(unix)]
+ cfg_any_os_ext! {
+ mod unix;
+ pub use self::unix::SourceFd;
+ }
+
+ #[cfg(unix)]
+ cfg_net! {
+ pub use self::unix::SocketAddr;
+ }
+}
diff --git a/mio/src/sys/shell/mod.rs b/mio/src/sys/shell/mod.rs
new file mode 100644
index 0000000..8a3175f
--- /dev/null
+++ b/mio/src/sys/shell/mod.rs
@@ -0,0 +1,72 @@
+macro_rules! os_required {
+ () => {
+ panic!("mio must be compiled with `os-poll` to run.")
+ };
+}
+
+mod selector;
+pub(crate) use self::selector::{event, Event, Events, Selector};
+
+#[cfg(not(target_os = "wasi"))]
+mod waker;
+#[cfg(not(target_os = "wasi"))]
+pub(crate) use self::waker::Waker;
+
+cfg_net! {
+ pub(crate) mod tcp;
+ pub(crate) mod udp;
+ #[cfg(unix)]
+ pub(crate) mod uds;
+}
+
+cfg_io_source! {
+ use std::io;
+ #[cfg(windows)]
+ use std::os::windows::io::RawSocket;
+
+ #[cfg(windows)]
+ use crate::{Registry, Token, Interest};
+
+ pub(crate) struct IoSourceState;
+
+ impl IoSourceState {
+ pub fn new() -> IoSourceState {
+ IoSourceState
+ }
+
+ pub fn do_io<T, F, R>(&self, f: F, io: &T) -> io::Result<R>
+ where
+ F: FnOnce(&T) -> io::Result<R>,
+ {
+ // We don't hold state, so we can just call the function and
+ // return.
+ f(io)
+ }
+ }
+
+ #[cfg(windows)]
+ impl IoSourceState {
+ pub fn register(
+ &mut self,
+ _: &Registry,
+ _: Token,
+ _: Interest,
+ _: RawSocket,
+ ) -> io::Result<()> {
+ os_required!()
+ }
+
+ pub fn reregister(
+ &mut self,
+ _: &Registry,
+ _: Token,
+ _: Interest,
+ ) -> io::Result<()> {
+ os_required!()
+ }
+
+ pub fn deregister(&mut self) -> io::Result<()> {
+ os_required!()
+ }
+ }
+}
diff --git a/mio/src/sys/shell/selector.rs b/mio/src/sys/shell/selector.rs
new file mode 100644
index 0000000..bfc598a
--- /dev/null
+++ b/mio/src/sys/shell/selector.rs
@@ -0,0 +1,127 @@
+use std::io;
+#[cfg(unix)]
+use std::os::unix::io::{AsRawFd, RawFd};
+use std::time::Duration;
+
+pub type Event = usize;
+
+pub type Events = Vec<Event>;
+
+#[derive(Debug)]
+pub struct Selector {}
+
+impl Selector {
+ pub fn try_clone(&self) -> io::Result<Selector> {
+ os_required!();
+ }
+
+ pub fn select(&self, _: &mut Events, _: Option<Duration>) -> io::Result<()> {
+ os_required!();
+ }
+
+ #[cfg(all(debug_assertions, not(target_os = "wasi")))]
+ pub fn register_waker(&self) -> bool {
+ os_required!();
+ }
+}
+
+#[cfg(unix)]
+cfg_any_os_ext! {
+ use crate::{Interest, Token};
+
+ impl Selector {
+ pub fn register(&self, _: RawFd, _: Token, _: Interest) -> io::Result<()> {
+ os_required!();
+ }
+
+ pub fn reregister(&self, _: RawFd, _: Token, _: Interest) -> io::Result<()> {
+ os_required!();
+ }
+
+ pub fn deregister(&self, _: RawFd) -> io::Result<()> {
+ os_required!();
+ }
+ }
+}
+
+#[cfg(target_os = "wasi")]
+cfg_any_os_ext! {
+ use crate::{Interest, Token};
+
+ impl Selector {
+ pub fn register(&self, _: wasi::Fd, _: Token, _: Interest) -> io::Result<()> {
+ os_required!();
+ }
+
+ pub fn reregister(&self, _: wasi::Fd, _: Token, _: Interest) -> io::Result<()> {
+ os_required!();
+ }
+
+ pub fn deregister(&self, _: wasi::Fd) -> io::Result<()> {
+ os_required!();
+ }
+ }
+}
+
+cfg_io_source! {
+ #[cfg(debug_assertions)]
+ impl Selector {
+ pub fn id(&self) -> usize {
+ os_required!();
+ }
+ }
+}
+
+#[cfg(unix)]
+impl AsRawFd for Selector {
+ fn as_raw_fd(&self) -> RawFd {
+ os_required!()
+ }
+}
+
+#[allow(clippy::trivially_copy_pass_by_ref)]
+pub mod event {
+ use crate::sys::Event;
+ use crate::Token;
+ use std::fmt;
+
+ pub fn token(_: &Event) -> Token {
+ os_required!();
+ }
+
+ pub fn is_readable(_: &Event) -> bool {
+ os_required!();
+ }
+
+ pub fn is_writable(_: &Event) -> bool {
+ os_required!();
+ }
+
+ pub fn is_error(_: &Event) -> bool {
+ os_required!();
+ }
+
+ pub fn is_read_closed(_: &Event) -> bool {
+ os_required!();
+ }
+
+ pub fn is_write_closed(_: &Event) -> bool {
+ os_required!();
+ }
+
+ pub fn is_priority(_: &Event) -> bool {
+ os_required!();
+ }
+
+ pub fn is_aio(_: &Event) -> bool {
+ os_required!();
+ }
+
+ pub fn is_lio(_: &Event) -> bool {
+ os_required!();
+ }
+
+ pub fn debug_details(_: &mut fmt::Formatter<'_>, _: &Event) -> fmt::Result {
+ os_required!();
+ }
+}
diff --git a/mio/src/sys/shell/tcp.rs b/mio/src/sys/shell/tcp.rs
new file mode 100644
index 0000000..260763a
--- /dev/null
+++ b/mio/src/sys/shell/tcp.rs
@@ -0,0 +1,31 @@
+use std::io;
+use std::net::{self, SocketAddr};
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn new_for_addr(_: SocketAddr) -> io::Result<i32> {
+ os_required!();
+}
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn bind(_: &net::TcpListener, _: SocketAddr) -> io::Result<()> {
+ os_required!();
+}
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn connect(_: &net::TcpStream, _: SocketAddr) -> io::Result<()> {
+ os_required!();
+}
+
+#[cfg(not(target_os = "wasi"))]
+pub(crate) fn listen(_: &net::TcpListener, _: u32) -> io::Result<()> {
+ os_required!();
+}
+
+#[cfg(unix)]
+pub(crate) fn set_reuseaddr(_: &net::TcpListener, _: bool) -> io::Result<()> {
+ os_required!();
+}
+
+pub(crate) fn accept(_: &net::TcpListener) -> io::Result<(net::TcpStream, SocketAddr)> {
+ os_required!();
+}
diff --git a/mio/src/sys/shell/udp.rs b/mio/src/sys/shell/udp.rs
new file mode 100644
index 0000000..6a48b69
--- /dev/null
+++ b/mio/src/sys/shell/udp.rs
@@ -0,0 +1,11 @@
+#![cfg(not(target_os = "wasi"))]
+use std::io;
+use std::net::{self, SocketAddr};
+
+pub fn bind(_: SocketAddr) -> io::Result<net::UdpSocket> {
+ os_required!()
+}
+
+pub(crate) fn only_v6(_: &net::UdpSocket) -> io::Result<bool> {
+ os_required!()
+}
diff --git a/mio/src/sys/shell/uds.rs b/mio/src/sys/shell/uds.rs
new file mode 100644
index 0000000..c18aca0
--- /dev/null
+++ b/mio/src/sys/shell/uds.rs
@@ -0,0 +1,75 @@
+pub(crate) mod datagram {
+ use crate::net::SocketAddr;
+ use std::io;
+ use std::os::unix::net;
+ use std::path::Path;
+
+ pub(crate) fn bind(_: &Path) -> io::Result<net::UnixDatagram> {
+ os_required!()
+ }
+
+ pub(crate) fn unbound() -> io::Result<net::UnixDatagram> {
+ os_required!()
+ }
+
+ pub(crate) fn pair() -> io::Result<(net::UnixDatagram, net::UnixDatagram)> {
+ os_required!()
+ }
+
+ pub(crate) fn local_addr(_: &net::UnixDatagram) -> io::Result<SocketAddr> {
+ os_required!()
+ }
+
+ pub(crate) fn peer_addr(_: &net::UnixDatagram) -> io::Result<SocketAddr> {
+ os_required!()
+ }
+
+ pub(crate) fn recv_from(
+ _: &net::UnixDatagram,
+ _: &mut [u8],
+ ) -> io::Result<(usize, SocketAddr)> {
+ os_required!()
+ }
+}
+
+pub(crate) mod listener {
+ use crate::net::{SocketAddr, UnixStream};
+ use std::io;
+ use std::os::unix::net;
+ use std::path::Path;
+
+ pub(crate) fn bind(_: &Path) -> io::Result<net::UnixListener> {
+ os_required!()
+ }
+
+ pub(crate) fn accept(_: &net::UnixListener) -> io::Result<(UnixStream, SocketAddr)> {
+ os_required!()
+ }
+
+ pub(crate) fn local_addr(_: &net::UnixListener) -> io::Result<SocketAddr> {
+ os_required!()
+ }
+}
+
+pub(crate) mod stream {
+ use crate::net::SocketAddr;
+ use std::io;
+ use std::os::unix::net;
+ use std::path::Path;
+
+ pub(crate) fn connect(_: &Path) -> io::Result<net::UnixStream> {
+ os_required!()
+ }
+
+ pub(crate) fn pair() -> io::Result<(net::UnixStream, net::UnixStream)> {
+ os_required!()
+ }
+
+ pub(crate) fn local_addr(_: &net::UnixStream) -> io::Result<SocketAddr> {
+ os_required!()
+ }
+
+ pub(crate) fn peer_addr(_: &net::UnixStream) -> io::Result<SocketAddr> {
+ os_required!()
+ }
+}
diff --git a/mio/src/sys/shell/waker.rs b/mio/src/sys/shell/waker.rs
new file mode 100644
index 0000000..bbdd7c3
--- /dev/null
+++ b/mio/src/sys/shell/waker.rs
@@ -0,0 +1,16 @@
+use crate::sys::Selector;
+use crate::Token;
+use std::io;
+
+#[derive(Debug)]
+pub struct Waker {}
+
+impl Waker {
+ pub fn new(_: &Selector, _: Token) -> io::Result<Waker> {
+ os_required!();
+ }
+
+ pub fn wake(&self) -> io::Result<()> {
+ os_required!();
+ }
+}
diff --git a/mio/src/sys/unix/mod.rs b/mio/src/sys/unix/mod.rs
new file mode 100644
index 0000000..ea5c50c
--- /dev/null
+++ b/mio/src/sys/unix/mod.rs
@@ -0,0 +1,73 @@
+/// Helper macro to execute a system call that returns an `io::Result`.
+//
+// Macro must be defined before any modules that uses them.
+#[allow(unused_macros)]
+macro_rules! syscall {
+ ($fn: ident ( $($arg: expr),* $(,)* ) ) => {{
+ let res = unsafe { libc::$fn($($arg, )*) };
+ if res == -1 {
+ Err(std::io::Error::last_os_error())
+ } else {
+ Ok(res)
+ }
+ }};
+}
+
+cfg_os_poll! {
+ mod selector;
+ pub(crate) use self::selector::{event, Event, Events, Selector};
+
+ mod sourcefd;
+ pub use self::sourcefd::SourceFd;
+
+ mod waker;
+ pub(crate) use self::waker::Waker;
+
+ cfg_net! {
+ mod net;
+
+ pub(crate) mod tcp;
+ pub(crate) mod udp;
+ pub(crate) mod uds;
+ pub use self::uds::SocketAddr;
+ }
+
+ cfg_io_source! {
+ use std::io;
+
+ // Both `kqueue` and `epoll` don't need to hold any user space state.
+ pub(crate) struct IoSourceState;
+
+ impl IoSourceState {
+ pub fn new() -> IoSourceState {
+ IoSourceState
+ }
+
+ pub fn do_io<T, F, R>(&self, f: F, io: &T) -> io::Result<R>
+ where
+ F: FnOnce(&T) -> io::Result<R>,
+ {
+ // We don't hold state, so we can just call the function and
+ // return.
+ f(io)
+ }
+ }
+ }
+
+ cfg_os_ext! {
+ #[cfg(not(target_vendor = "teaclave"))]
+ pub(crate) mod pipe;
+ }
+}
+
+cfg_not_os_poll! {
+ cfg_net! {
+ mod uds;
+ pub use self::uds::SocketAddr;
+ }
+
+ cfg_any_os_ext! {
+ mod sourcefd;
+ pub use self::sourcefd::SourceFd;
+ }
+}
diff --git a/mio/src/sys/unix/net.rs b/mio/src/sys/unix/net.rs
new file mode 100644
index 0000000..e93918c
--- /dev/null
+++ b/mio/src/sys/unix/net.rs
@@ -0,0 +1,178 @@
+use std::io;
+use std::mem::size_of;
+use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
+
+pub(crate) fn new_ip_socket(addr: SocketAddr, socket_type: libc::c_int) -> io::Result<libc::c_int> {
+ let domain = match addr {
+ SocketAddr::V4(..) => libc::AF_INET,
+ SocketAddr::V6(..) => libc::AF_INET6,
+ };
+
+ new_socket(domain, socket_type)
+}
+
+/// Create a new non-blocking socket.
+pub(crate) fn new_socket(domain: libc::c_int, socket_type: libc::c_int) -> io::Result<libc::c_int> {
+ #[cfg(any(
+ target_os = "android",
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "illumos",
+ target_os = "linux",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ ))]
+ let socket_type = socket_type | libc::SOCK_NONBLOCK | libc::SOCK_CLOEXEC;
+
+ let socket = syscall!(socket(domain, socket_type, 0))?;
+
+ // Mimick `libstd` and set `SO_NOSIGPIPE` on apple systems.
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ if let Err(err) = syscall!(setsockopt(
+ socket,
+ libc::SOL_SOCKET,
+ libc::SO_NOSIGPIPE,
+ &1 as *const libc::c_int as *const libc::c_void,
+ size_of::<libc::c_int>() as libc::socklen_t
+ )) {
+ let _ = syscall!(close(socket));
+ return Err(err);
+ }
+
+ // Darwin doesn't have SOCK_NONBLOCK or SOCK_CLOEXEC.
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ {
+ if let Err(err) = syscall!(fcntl(socket, libc::F_SETFL, libc::O_NONBLOCK)) {
+ let _ = syscall!(close(socket));
+ return Err(err);
+ }
+ if let Err(err) = syscall!(fcntl(socket, libc::F_SETFD, libc::FD_CLOEXEC)) {
+ let _ = syscall!(close(socket));
+ return Err(err);
+ }
+ }
+
+ Ok(socket)
+}
+
+/// A type with the same memory layout as `libc::sockaddr`. Used in converting Rust level
+/// SocketAddr* types into their system representation. The benefit of this specific
+/// type over using `libc::sockaddr_storage` is that this type is exactly as large as it
+/// needs to be and not a lot larger. And it can be initialized cleaner from Rust.
+#[repr(C)]
+pub(crate) union SocketAddrCRepr {
+ v4: libc::sockaddr_in,
+ v6: libc::sockaddr_in6,
+}
+
+impl SocketAddrCRepr {
+ pub(crate) fn as_ptr(&self) -> *const libc::sockaddr {
+ self as *const _ as *const libc::sockaddr
+ }
+}
+
+/// Converts a Rust `SocketAddr` into the system representation.
+pub(crate) fn socket_addr(addr: &SocketAddr) -> (SocketAddrCRepr, libc::socklen_t) {
+ match addr {
+ SocketAddr::V4(ref addr) => {
+ // `s_addr` is stored as BE on all machine and the array is in BE order.
+ // So the native endian conversion method is used so that it's never swapped.
+ let sin_addr = libc::in_addr {
+ s_addr: u32::from_ne_bytes(addr.ip().octets()),
+ };
+
+ let sockaddr_in = libc::sockaddr_in {
+ sin_family: libc::AF_INET as libc::sa_family_t,
+ sin_port: addr.port().to_be(),
+ sin_addr,
+ sin_zero: [0; 8],
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ sin_len: 0,
+ };
+
+ let sockaddr = SocketAddrCRepr { v4: sockaddr_in };
+ let socklen = size_of::<libc::sockaddr_in>() as libc::socklen_t;
+ (sockaddr, socklen)
+ }
+ SocketAddr::V6(ref addr) => {
+ let sockaddr_in6 = libc::sockaddr_in6 {
+ sin6_family: libc::AF_INET6 as libc::sa_family_t,
+ sin6_port: addr.port().to_be(),
+ sin6_addr: libc::in6_addr {
+ s6_addr: addr.ip().octets(),
+ },
+ sin6_flowinfo: addr.flowinfo(),
+ sin6_scope_id: addr.scope_id(),
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ sin6_len: 0,
+ #[cfg(target_os = "illumos")]
+ __sin6_src_id: 0,
+ };
+
+ let sockaddr = SocketAddrCRepr { v6: sockaddr_in6 };
+ let socklen = size_of::<libc::sockaddr_in6>() as libc::socklen_t;
+ (sockaddr, socklen)
+ }
+ }
+}
+
+/// Converts a `libc::sockaddr` compatible struct into a native Rust `SocketAddr`.
+///
+/// # Safety
+///
+/// `storage` must have the `ss_family` field correctly initialized.
+/// `storage` must be initialised to a `sockaddr_in` or `sockaddr_in6`.
+pub(crate) unsafe fn to_socket_addr(
+ storage: *const libc::sockaddr_storage,
+) -> io::Result<SocketAddr> {
+ match (*storage).ss_family as libc::c_int {
+ libc::AF_INET => {
+ // Safety: if the ss_family field is AF_INET then storage must be a sockaddr_in.
+ let addr: &libc::sockaddr_in = &*(storage as *const libc::sockaddr_in);
+ let ip = Ipv4Addr::from(addr.sin_addr.s_addr.to_ne_bytes());
+ let port = u16::from_be(addr.sin_port);
+ Ok(SocketAddr::V4(SocketAddrV4::new(ip, port)))
+ }
+ libc::AF_INET6 => {
+ // Safety: if the ss_family field is AF_INET6 then storage must be a sockaddr_in6.
+ let addr: &libc::sockaddr_in6 = &*(storage as *const libc::sockaddr_in6);
+ let ip = Ipv6Addr::from(addr.sin6_addr.s6_addr);
+ let port = u16::from_be(addr.sin6_port);
+ Ok(SocketAddr::V6(SocketAddrV6::new(
+ ip,
+ port,
+ addr.sin6_flowinfo,
+ addr.sin6_scope_id,
+ )))
+ }
+ _ => Err(io::ErrorKind::InvalidInput.into()),
+ }
+}
diff --git a/mio/src/sys/unix/pipe.rs b/mio/src/sys/unix/pipe.rs
new file mode 100644
index 0000000..c2654ad
--- /dev/null
+++ b/mio/src/sys/unix/pipe.rs
@@ -0,0 +1,577 @@
+//! Unix pipe.
+//!
+//! See the [`new`] function for documentation.
+
+use std::fs::File;
+use std::io::{self, IoSlice, IoSliceMut, Read, Write};
+use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+use std::process::{ChildStderr, ChildStdin, ChildStdout};
+
+use crate::io_source::IoSource;
+use crate::{event, Interest, Registry, Token};
+
+/// Create a new non-blocking Unix pipe.
+///
+/// This is a wrapper around Unix's [`pipe(2)`] system call and can be used as
+/// inter-process or thread communication channel.
+///
+/// This channel may be created before forking the process and then one end used
+/// in each process, e.g. the parent process has the sending end to send command
+/// to the child process.
+///
+/// [`pipe(2)`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/pipe.html
+///
+/// # Events
+///
+/// The [`Sender`] can be registered with [`WRITABLE`] interest to receive
+/// [writable events], the [`Receiver`] with [`READABLE`] interest. Once data is
+/// written to the `Sender` the `Receiver` will receive an [readable event].
+///
+/// In addition to those events, events will also be generated if the other side
+/// is dropped. To check if the `Sender` is dropped you'll need to check
+/// [`is_read_closed`] on events for the `Receiver`, if it returns true the
+/// `Sender` is dropped. On the `Sender` end check [`is_write_closed`], if it
+/// returns true the `Receiver` was dropped. Also see the second example below.
+///
+/// [`WRITABLE`]: Interest::WRITABLE
+/// [writable events]: event::Event::is_writable
+/// [`READABLE`]: Interest::READABLE
+/// [readable event]: event::Event::is_readable
+/// [`is_read_closed`]: event::Event::is_read_closed
+/// [`is_write_closed`]: event::Event::is_write_closed
+///
+/// # Deregistering
+///
+/// Both `Sender` and `Receiver` will deregister themselves when dropped,
+/// **iff** the file descriptors are not duplicated (via [`dup(2)`]).
+///
+/// [`dup(2)`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/dup.html
+///
+/// # Examples
+///
+/// Simple example that writes data into the sending end and read it from the
+/// receiving end.
+///
+/// ```
+/// use std::io::{self, Read, Write};
+///
+/// use mio::{Poll, Events, Interest, Token};
+/// use mio::unix::pipe;
+///
+/// // Unique tokens for the two ends of the channel.
+/// const PIPE_RECV: Token = Token(0);
+/// const PIPE_SEND: Token = Token(1);
+///
+/// # fn main() -> io::Result<()> {
+/// // Create our `Poll` instance and the `Events` container.
+/// let mut poll = Poll::new()?;
+/// let mut events = Events::with_capacity(8);
+///
+/// // Create a new pipe.
+/// let (mut sender, mut receiver) = pipe::new()?;
+///
+/// // Register both ends of the channel.
+/// poll.registry().register(&mut receiver, PIPE_RECV, Interest::READABLE)?;
+/// poll.registry().register(&mut sender, PIPE_SEND, Interest::WRITABLE)?;
+///
+/// const MSG: &[u8; 11] = b"Hello world";
+///
+/// loop {
+/// poll.poll(&mut events, None)?;
+///
+/// for event in events.iter() {
+/// match event.token() {
+/// PIPE_SEND => sender.write(MSG)
+/// .and_then(|n| if n != MSG.len() {
+/// // We'll consider a short write an error in this
+/// // example. NOTE: we can't use `write_all` with
+/// // non-blocking I/O.
+/// Err(io::ErrorKind::WriteZero.into())
+/// } else {
+/// Ok(())
+/// })?,
+/// PIPE_RECV => {
+/// let mut buf = [0; 11];
+/// let n = receiver.read(&mut buf)?;
+/// println!("received: {:?}", &buf[0..n]);
+/// assert_eq!(n, MSG.len());
+/// assert_eq!(&buf, &*MSG);
+/// return Ok(());
+/// },
+/// _ => unreachable!(),
+/// }
+/// }
+/// }
+/// # }
+/// ```
+///
+/// Example that receives an event once the `Sender` is dropped.
+///
+/// ```
+/// # use std::io;
+/// #
+/// # use mio::{Poll, Events, Interest, Token};
+/// # use mio::unix::pipe;
+/// #
+/// # const PIPE_RECV: Token = Token(0);
+/// # const PIPE_SEND: Token = Token(1);
+/// #
+/// # fn main() -> io::Result<()> {
+/// // Same setup as in the example above.
+/// let mut poll = Poll::new()?;
+/// let mut events = Events::with_capacity(8);
+///
+/// let (mut sender, mut receiver) = pipe::new()?;
+///
+/// poll.registry().register(&mut receiver, PIPE_RECV, Interest::READABLE)?;
+/// poll.registry().register(&mut sender, PIPE_SEND, Interest::WRITABLE)?;
+///
+/// // Drop the sender.
+/// drop(sender);
+///
+/// poll.poll(&mut events, None)?;
+///
+/// for event in events.iter() {
+/// match event.token() {
+/// PIPE_RECV if event.is_read_closed() => {
+/// // Detected that the sender was dropped.
+/// println!("Sender dropped!");
+/// return Ok(());
+/// },
+/// _ => unreachable!(),
+/// }
+/// }
+/// # unreachable!();
+/// # }
+/// ```
+pub fn new() -> io::Result<(Sender, Receiver)> {
+ let mut fds: [RawFd; 2] = [-1, -1];
+
+ #[cfg(any(
+ target_os = "android",
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "linux",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ target_os = "illumos",
+ target_os = "redox",
+ ))]
+ unsafe {
+ if libc::pipe2(fds.as_mut_ptr(), libc::O_CLOEXEC | libc::O_NONBLOCK) != 0 {
+ return Err(io::Error::last_os_error());
+ }
+ }
+
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ unsafe {
+ // For platforms that don't have `pipe2(2)` we need to manually set the
+ // correct flags on the file descriptor.
+ if libc::pipe(fds.as_mut_ptr()) != 0 {
+ return Err(io::Error::last_os_error());
+ }
+
+ for fd in &fds {
+ if libc::fcntl(*fd, libc::F_SETFL, libc::O_NONBLOCK) != 0
+ || libc::fcntl(*fd, libc::F_SETFD, libc::FD_CLOEXEC) != 0
+ {
+ let err = io::Error::last_os_error();
+ // Don't leak file descriptors. Can't handle closing error though.
+ let _ = libc::close(fds[0]);
+ let _ = libc::close(fds[1]);
+ return Err(err);
+ }
+ }
+ }
+
+ #[cfg(not(any(
+ target_os = "android",
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "illumos",
+ target_os = "ios",
+ target_os = "linux",
+ target_os = "macos",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ target_os = "redox",
+ target_os = "tvos",
+ target_os = "watchos",
+ )))]
+ compile_error!("unsupported target for `mio::unix::pipe`");
+
+ // SAFETY: we just initialised the `fds` above.
+ let r = unsafe { Receiver::from_raw_fd(fds[0]) };
+ let w = unsafe { Sender::from_raw_fd(fds[1]) };
+
+ Ok((w, r))
+}
+
+/// Sending end of an Unix pipe.
+///
+/// See [`new`] for documentation, including examples.
+#[derive(Debug)]
+pub struct Sender {
+ inner: IoSource<File>,
+}
+
+impl Sender {
+ /// Set the `Sender` into or out of non-blocking mode.
+ pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> {
+ set_nonblocking(self.inner.as_raw_fd(), nonblocking)
+ }
+
+ /// Execute an I/O operation ensuring that the socket receives more events
+ /// if it hits a [`WouldBlock`] error.
+ ///
+ /// # Notes
+ ///
+ /// This method is required to be called for **all** I/O operations to
+ /// ensure the user will receive events once the socket is ready again after
+ /// returning a [`WouldBlock`] error.
+ ///
+ /// [`WouldBlock`]: io::ErrorKind::WouldBlock
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use std::io;
+ /// use std::os::unix::io::AsRawFd;
+ /// use mio::unix::pipe;
+ ///
+ /// let (sender, receiver) = pipe::new()?;
+ ///
+ /// // Wait until the sender is writable...
+ ///
+ /// // Write to the sender using a direct libc call, of course the
+ /// // `io::Write` implementation would be easier to use.
+ /// let buf = b"hello";
+ /// let n = sender.try_io(|| {
+ /// let buf_ptr = &buf as *const _ as *const _;
+ /// let res = unsafe { libc::write(sender.as_raw_fd(), buf_ptr, buf.len()) };
+ /// if res != -1 {
+ /// Ok(res as usize)
+ /// } else {
+ /// // If EAGAIN or EWOULDBLOCK is set by libc::write, the closure
+ /// // should return `WouldBlock` error.
+ /// Err(io::Error::last_os_error())
+ /// }
+ /// })?;
+ /// eprintln!("write {} bytes", n);
+ ///
+ /// // Wait until the receiver is readable...
+ ///
+ /// // Read from the receiver using a direct libc call, of course the
+ /// // `io::Read` implementation would be easier to use.
+ /// let mut buf = [0; 512];
+ /// let n = receiver.try_io(|| {
+ /// let buf_ptr = &mut buf as *mut _ as *mut _;
+ /// let res = unsafe { libc::read(receiver.as_raw_fd(), buf_ptr, buf.len()) };
+ /// if res != -1 {
+ /// Ok(res as usize)
+ /// } else {
+ /// // If EAGAIN or EWOULDBLOCK is set by libc::read, the closure
+ /// // should return `WouldBlock` error.
+ /// Err(io::Error::last_os_error())
+ /// }
+ /// })?;
+ /// eprintln!("read {} bytes", n);
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn try_io<F, T>(&self, f: F) -> io::Result<T>
+ where
+ F: FnOnce() -> io::Result<T>,
+ {
+ self.inner.do_io(|_| f())
+ }
+}
+
+impl event::Source for Sender {
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.register(registry, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.reregister(registry, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ self.inner.deregister(registry)
+ }
+}
+
+impl Write for Sender {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut sender| sender.write(buf))
+ }
+
+ fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut sender| sender.write_vectored(bufs))
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.do_io(|mut sender| sender.flush())
+ }
+}
+
+impl Write for &Sender {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut sender| sender.write(buf))
+ }
+
+ fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut sender| sender.write_vectored(bufs))
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.do_io(|mut sender| sender.flush())
+ }
+}
+
+/// # Notes
+///
+/// The underlying pipe is **not** set to non-blocking.
+impl From<ChildStdin> for Sender {
+ fn from(stdin: ChildStdin) -> Sender {
+ // Safety: `ChildStdin` is guaranteed to be a valid file descriptor.
+ unsafe { Sender::from_raw_fd(stdin.into_raw_fd()) }
+ }
+}
+
+impl FromRawFd for Sender {
+ unsafe fn from_raw_fd(fd: RawFd) -> Sender {
+ Sender {
+ inner: IoSource::new(File::from_raw_fd(fd)),
+ }
+ }
+}
+
+impl AsRawFd for Sender {
+ fn as_raw_fd(&self) -> RawFd {
+ self.inner.as_raw_fd()
+ }
+}
+
+impl IntoRawFd for Sender {
+ fn into_raw_fd(self) -> RawFd {
+ self.inner.into_inner().into_raw_fd()
+ }
+}
+
+/// Receiving end of an Unix pipe.
+///
+/// See [`new`] for documentation, including examples.
+#[derive(Debug)]
+pub struct Receiver {
+ inner: IoSource<File>,
+}
+
+impl Receiver {
+ /// Set the `Receiver` into or out of non-blocking mode.
+ pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> {
+ set_nonblocking(self.inner.as_raw_fd(), nonblocking)
+ }
+
+ /// Execute an I/O operation ensuring that the socket receives more events
+ /// if it hits a [`WouldBlock`] error.
+ ///
+ /// # Notes
+ ///
+ /// This method is required to be called for **all** I/O operations to
+ /// ensure the user will receive events once the socket is ready again after
+ /// returning a [`WouldBlock`] error.
+ ///
+ /// [`WouldBlock`]: io::ErrorKind::WouldBlock
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// # use std::error::Error;
+ /// #
+ /// # fn main() -> Result<(), Box<dyn Error>> {
+ /// use std::io;
+ /// use std::os::unix::io::AsRawFd;
+ /// use mio::unix::pipe;
+ ///
+ /// let (sender, receiver) = pipe::new()?;
+ ///
+ /// // Wait until the sender is writable...
+ ///
+ /// // Write to the sender using a direct libc call, of course the
+ /// // `io::Write` implementation would be easier to use.
+ /// let buf = b"hello";
+ /// let n = sender.try_io(|| {
+ /// let buf_ptr = &buf as *const _ as *const _;
+ /// let res = unsafe { libc::write(sender.as_raw_fd(), buf_ptr, buf.len()) };
+ /// if res != -1 {
+ /// Ok(res as usize)
+ /// } else {
+ /// // If EAGAIN or EWOULDBLOCK is set by libc::write, the closure
+ /// // should return `WouldBlock` error.
+ /// Err(io::Error::last_os_error())
+ /// }
+ /// })?;
+ /// eprintln!("write {} bytes", n);
+ ///
+ /// // Wait until the receiver is readable...
+ ///
+ /// // Read from the receiver using a direct libc call, of course the
+ /// // `io::Read` implementation would be easier to use.
+ /// let mut buf = [0; 512];
+ /// let n = receiver.try_io(|| {
+ /// let buf_ptr = &mut buf as *mut _ as *mut _;
+ /// let res = unsafe { libc::read(receiver.as_raw_fd(), buf_ptr, buf.len()) };
+ /// if res != -1 {
+ /// Ok(res as usize)
+ /// } else {
+ /// // If EAGAIN or EWOULDBLOCK is set by libc::read, the closure
+ /// // should return `WouldBlock` error.
+ /// Err(io::Error::last_os_error())
+ /// }
+ /// })?;
+ /// eprintln!("read {} bytes", n);
+ /// # Ok(())
+ /// # }
+ /// ```
+ pub fn try_io<F, T>(&self, f: F) -> io::Result<T>
+ where
+ F: FnOnce() -> io::Result<T>,
+ {
+ self.inner.do_io(|_| f())
+ }
+}
+
+impl event::Source for Receiver {
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.register(registry, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ self.inner.reregister(registry, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ self.inner.deregister(registry)
+ }
+}
+
+impl Read for Receiver {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut sender| sender.read(buf))
+ }
+
+ fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut sender| sender.read_vectored(bufs))
+ }
+}
+
+impl Read for &Receiver {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.do_io(|mut sender| sender.read(buf))
+ }
+
+ fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+ self.inner.do_io(|mut sender| sender.read_vectored(bufs))
+ }
+}
+
+/// # Notes
+///
+/// The underlying pipe is **not** set to non-blocking.
+impl From<ChildStdout> for Receiver {
+ fn from(stdout: ChildStdout) -> Receiver {
+ // Safety: `ChildStdout` is guaranteed to be a valid file descriptor.
+ unsafe { Receiver::from_raw_fd(stdout.into_raw_fd()) }
+ }
+}
+
+/// # Notes
+///
+/// The underlying pipe is **not** set to non-blocking.
+impl From<ChildStderr> for Receiver {
+ fn from(stderr: ChildStderr) -> Receiver {
+ // Safety: `ChildStderr` is guaranteed to be a valid file descriptor.
+ unsafe { Receiver::from_raw_fd(stderr.into_raw_fd()) }
+ }
+}
+
+impl FromRawFd for Receiver {
+ unsafe fn from_raw_fd(fd: RawFd) -> Receiver {
+ Receiver {
+ inner: IoSource::new(File::from_raw_fd(fd)),
+ }
+ }
+}
+
+impl AsRawFd for Receiver {
+ fn as_raw_fd(&self) -> RawFd {
+ self.inner.as_raw_fd()
+ }
+}
+
+impl IntoRawFd for Receiver {
+ fn into_raw_fd(self) -> RawFd {
+ self.inner.into_inner().into_raw_fd()
+ }
+}
+
+#[cfg(not(target_os = "illumos"))]
+fn set_nonblocking(fd: RawFd, nonblocking: bool) -> io::Result<()> {
+ let value = nonblocking as libc::c_int;
+ if unsafe { libc::ioctl(fd, libc::FIONBIO, &value) } == -1 {
+ Err(io::Error::last_os_error())
+ } else {
+ Ok(())
+ }
+}
+
+#[cfg(target_os = "illumos")]
+fn set_nonblocking(fd: RawFd, nonblocking: bool) -> io::Result<()> {
+ let flags = unsafe { libc::fcntl(fd, libc::F_GETFL) };
+ if flags < 0 {
+ return Err(io::Error::last_os_error());
+ }
+
+ let nflags = if nonblocking {
+ flags | libc::O_NONBLOCK
+ } else {
+ flags & !libc::O_NONBLOCK
+ };
+
+ if flags != nflags {
+ if unsafe { libc::fcntl(fd, libc::F_SETFL, nflags) } < 0 {
+ return Err(io::Error::last_os_error());
+ }
+ }
+
+ Ok(())
+}
diff --git a/mio/src/sys/unix/selector/epoll.rs b/mio/src/sys/unix/selector/epoll.rs
new file mode 100644
index 0000000..282d126
--- /dev/null
+++ b/mio/src/sys/unix/selector/epoll.rs
@@ -0,0 +1,290 @@
+use crate::{Interest, Token};
+
+use libc::{EPOLLET, EPOLLIN, EPOLLOUT, EPOLLPRI, EPOLLRDHUP};
+use log::error;
+use std::os::unix::io::{AsRawFd, RawFd};
+#[cfg(debug_assertions)]
+use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
+use std::time::Duration;
+use std::{cmp, i32, io, ptr};
+
+/// Unique id for use as `SelectorId`.
+#[cfg(debug_assertions)]
+static NEXT_ID: AtomicUsize = AtomicUsize::new(1);
+
+#[derive(Debug)]
+pub struct Selector {
+ #[cfg(debug_assertions)]
+ id: usize,
+ ep: RawFd,
+ #[cfg(debug_assertions)]
+ has_waker: AtomicBool,
+}
+
+impl Selector {
+ pub fn new() -> io::Result<Selector> {
+ #[cfg(not(target_os = "android"))]
+ let res = syscall!(epoll_create1(libc::EPOLL_CLOEXEC));
+
+ // On Android < API level 16 `epoll_create1` is not defined, so use a
+ // raw system call.
+ // According to libuv, `EPOLL_CLOEXEC` is not defined on Android API <
+ // 21. But `EPOLL_CLOEXEC` is an alias for `O_CLOEXEC` on that platform,
+ // so we use it instead.
+ #[cfg(target_os = "android")]
+ let res = syscall!(syscall(libc::SYS_epoll_create1, libc::O_CLOEXEC));
+
+ let ep = match res {
+ Ok(ep) => ep as RawFd,
+ Err(err) => {
+ // When `epoll_create1` is not available fall back to use
+ // `epoll_create` followed by `fcntl`.
+ if let Some(libc::ENOSYS) = err.raw_os_error() {
+ match syscall!(epoll_create(1024)) {
+ Ok(ep) => match syscall!(fcntl(ep, libc::F_SETFD, libc::FD_CLOEXEC)) {
+ Ok(ep) => ep as RawFd,
+ Err(err) => {
+ // `fcntl` failed, cleanup `ep`.
+ let _ = unsafe { libc::close(ep) };
+ return Err(err);
+ }
+ },
+ Err(err) => return Err(err),
+ }
+ } else {
+ return Err(err);
+ }
+ }
+ };
+
+ Ok(Selector {
+ #[cfg(debug_assertions)]
+ id: NEXT_ID.fetch_add(1, Ordering::Relaxed),
+ ep,
+ #[cfg(debug_assertions)]
+ has_waker: AtomicBool::new(false),
+ })
+ }
+
+ pub fn try_clone(&self) -> io::Result<Selector> {
+ syscall!(fcntl(self.ep, libc::F_DUPFD_CLOEXEC, super::LOWEST_FD)).map(|ep| Selector {
+ // It's the same selector, so we use the same id.
+ #[cfg(debug_assertions)]
+ id: self.id,
+ ep,
+ #[cfg(debug_assertions)]
+ has_waker: AtomicBool::new(self.has_waker.load(Ordering::Acquire)),
+ })
+ }
+
+ pub fn select(&self, events: &mut Events, timeout: Option<Duration>) -> io::Result<()> {
+ // A bug in kernels < 2.6.37 makes timeouts larger than LONG_MAX / CONFIG_HZ
+ // (approx. 30 minutes with CONFIG_HZ=1200) effectively infinite on 32 bits
+ // architectures. The magic number is the same constant used by libuv.
+ #[cfg(target_pointer_width = "32")]
+ const MAX_SAFE_TIMEOUT: u128 = 1789569;
+ #[cfg(not(target_pointer_width = "32"))]
+ const MAX_SAFE_TIMEOUT: u128 = libc::c_int::max_value() as u128;
+
+ let timeout = timeout
+ .map(|to| {
+ // `Duration::as_millis` truncates, so round up. This avoids
+ // turning sub-millisecond timeouts into a zero timeout, unless
+ // the caller explicitly requests that by specifying a zero
+ // timeout.
+ let to_ms = to
+ .checked_add(Duration::from_nanos(999_999))
+ .unwrap_or(to)
+ .as_millis();
+ cmp::min(MAX_SAFE_TIMEOUT, to_ms) as libc::c_int
+ })
+ .unwrap_or(-1);
+
+ events.clear();
+ syscall!(epoll_wait(
+ self.ep,
+ events.as_mut_ptr(),
+ events.capacity() as i32,
+ timeout,
+ ))
+ .map(|n_events| {
+ // This is safe because `epoll_wait` ensures that `n_events` are
+ // assigned.
+ unsafe { events.set_len(n_events as usize) };
+ })
+ }
+
+ pub fn register(&self, fd: RawFd, token: Token, interests: Interest) -> io::Result<()> {
+ let mut event = libc::epoll_event {
+ events: interests_to_epoll(interests),
+ u64: usize::from(token) as u64,
+ #[cfg(target_os = "redox")]
+ _pad: 0,
+ };
+
+ syscall!(epoll_ctl(self.ep, libc::EPOLL_CTL_ADD, fd, &mut event)).map(|_| ())
+ }
+
+ pub fn reregister(&self, fd: RawFd, token: Token, interests: Interest) -> io::Result<()> {
+ let mut event = libc::epoll_event {
+ events: interests_to_epoll(interests),
+ u64: usize::from(token) as u64,
+ #[cfg(target_os = "redox")]
+ _pad: 0,
+ };
+
+ syscall!(epoll_ctl(self.ep, libc::EPOLL_CTL_MOD, fd, &mut event)).map(|_| ())
+ }
+
+ pub fn deregister(&self, fd: RawFd) -> io::Result<()> {
+ syscall!(epoll_ctl(self.ep, libc::EPOLL_CTL_DEL, fd, ptr::null_mut())).map(|_| ())
+ }
+
+ #[cfg(debug_assertions)]
+ pub fn register_waker(&self) -> bool {
+ self.has_waker.swap(true, Ordering::AcqRel)
+ }
+}
+
+cfg_io_source! {
+ impl Selector {
+ #[cfg(debug_assertions)]
+ pub fn id(&self) -> usize {
+ self.id
+ }
+ }
+}
+
+impl AsRawFd for Selector {
+ fn as_raw_fd(&self) -> RawFd {
+ self.ep
+ }
+}
+
+impl Drop for Selector {
+ fn drop(&mut self) {
+ if let Err(err) = syscall!(close(self.ep)) {
+ error!("error closing epoll: {}", err);
+ }
+ }
+}
+
+fn interests_to_epoll(interests: Interest) -> u32 {
+ let mut kind = EPOLLET;
+
+ if interests.is_readable() {
+ kind = kind | EPOLLIN | EPOLLRDHUP;
+ }
+
+ if interests.is_writable() {
+ kind |= EPOLLOUT;
+ }
+
+ if interests.is_priority() {
+ kind |= EPOLLPRI;
+ }
+
+ kind as u32
+}
+
+pub type Event = libc::epoll_event;
+pub type Events = Vec<Event>;
+
+pub mod event {
+ use std::fmt;
+
+ use crate::sys::Event;
+ use crate::Token;
+
+ pub fn token(event: &Event) -> Token {
+ Token(event.u64 as usize)
+ }
+
+ pub fn is_readable(event: &Event) -> bool {
+ (event.events as libc::c_int & libc::EPOLLIN) != 0
+ || (event.events as libc::c_int & libc::EPOLLPRI) != 0
+ }
+
+ pub fn is_writable(event: &Event) -> bool {
+ (event.events as libc::c_int & libc::EPOLLOUT) != 0
+ }
+
+ pub fn is_error(event: &Event) -> bool {
+ (event.events as libc::c_int & libc::EPOLLERR) != 0
+ }
+
+ pub fn is_read_closed(event: &Event) -> bool {
+ // Both halves of the socket have closed
+ event.events as libc::c_int & libc::EPOLLHUP != 0
+ // Socket has received FIN or called shutdown(SHUT_RD)
+ || (event.events as libc::c_int & libc::EPOLLIN != 0
+ && event.events as libc::c_int & libc::EPOLLRDHUP != 0)
+ }
+
+ pub fn is_write_closed(event: &Event) -> bool {
+ // Both halves of the socket have closed
+ event.events as libc::c_int & libc::EPOLLHUP != 0
+ // Unix pipe write end has closed
+ || (event.events as libc::c_int & libc::EPOLLOUT != 0
+ && event.events as libc::c_int & libc::EPOLLERR != 0)
+ // The other side (read end) of a Unix pipe has closed.
+ || event.events as libc::c_int == libc::EPOLLERR
+ }
+
+ pub fn is_priority(event: &Event) -> bool {
+ (event.events as libc::c_int & libc::EPOLLPRI) != 0
+ }
+
+ pub fn is_aio(_: &Event) -> bool {
+ // Not supported in the kernel, only in libc.
+ false
+ }
+
+ pub fn is_lio(_: &Event) -> bool {
+ // Not supported.
+ false
+ }
+
+ pub fn debug_details(f: &mut fmt::Formatter<'_>, event: &Event) -> fmt::Result {
+ #[allow(clippy::trivially_copy_pass_by_ref)]
+ fn check_events(got: &u32, want: &libc::c_int) -> bool {
+ (*got as libc::c_int & want) != 0
+ }
+ debug_detail!(
+ EventsDetails(u32),
+ check_events,
+ libc::EPOLLIN,
+ libc::EPOLLPRI,
+ libc::EPOLLOUT,
+ libc::EPOLLRDNORM,
+ libc::EPOLLRDBAND,
+ libc::EPOLLWRNORM,
+ libc::EPOLLWRBAND,
+ libc::EPOLLMSG,
+ libc::EPOLLERR,
+ libc::EPOLLHUP,
+ libc::EPOLLET,
+ libc::EPOLLRDHUP,
+ libc::EPOLLONESHOT,
+ #[cfg(target_os = "linux")]
+ libc::EPOLLEXCLUSIVE,
+ #[cfg(any(target_os = "android", target_os = "linux"))]
+ libc::EPOLLWAKEUP,
+ libc::EPOLL_CLOEXEC,
+ );
+
+ // Can't reference fields in packed structures.
+ let e_u64 = event.u64;
+ f.debug_struct("epoll_event")
+ .field("events", &EventsDetails(event.events))
+ .field("u64", &e_u64)
+ .finish()
+ }
+}
+
+#[cfg(target_os = "android")]
+#[test]
+fn assert_close_on_exec_flag() {
+ // This assertion need to be true for Selector::new.
+ assert_eq!(libc::O_CLOEXEC, libc::EPOLL_CLOEXEC);
+}
diff --git a/mio/src/sys/unix/selector/kqueue.rs b/mio/src/sys/unix/selector/kqueue.rs
new file mode 100644
index 0000000..4b0c631
--- /dev/null
+++ b/mio/src/sys/unix/selector/kqueue.rs
@@ -0,0 +1,861 @@
+use crate::{Interest, Token};
+use log::error;
+use std::mem::{self, MaybeUninit};
+use std::ops::{Deref, DerefMut};
+use std::os::unix::io::{AsRawFd, RawFd};
+#[cfg(debug_assertions)]
+use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
+use std::time::Duration;
+use std::{cmp, io, ptr, slice};
+
+/// Unique id for use as `SelectorId`.
+#[cfg(debug_assertions)]
+static NEXT_ID: AtomicUsize = AtomicUsize::new(1);
+
+// Type of the `nchanges` and `nevents` parameters in the `kevent` function.
+#[cfg(not(target_os = "netbsd"))]
+type Count = libc::c_int;
+#[cfg(target_os = "netbsd")]
+type Count = libc::size_t;
+
+// Type of the `filter` field in the `kevent` structure.
+#[cfg(any(target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+type Filter = libc::c_short;
+#[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+))]
+type Filter = i16;
+#[cfg(target_os = "netbsd")]
+type Filter = u32;
+
+// Type of the `flags` field in the `kevent` structure.
+#[cfg(any(target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+type Flags = libc::c_ushort;
+#[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+))]
+type Flags = u16;
+#[cfg(target_os = "netbsd")]
+type Flags = u32;
+
+// Type of the `udata` field in the `kevent` structure.
+#[cfg(not(target_os = "netbsd"))]
+type UData = *mut libc::c_void;
+#[cfg(target_os = "netbsd")]
+type UData = libc::intptr_t;
+
+macro_rules! kevent {
+ ($id: expr, $filter: expr, $flags: expr, $data: expr) => {
+ libc::kevent {
+ ident: $id as libc::uintptr_t,
+ filter: $filter as Filter,
+ flags: $flags,
+ udata: $data as UData,
+ ..unsafe { mem::zeroed() }
+ }
+ };
+}
+
+#[derive(Debug)]
+pub struct Selector {
+ #[cfg(debug_assertions)]
+ id: usize,
+ kq: RawFd,
+ #[cfg(debug_assertions)]
+ has_waker: AtomicBool,
+}
+
+impl Selector {
+ pub fn new() -> io::Result<Selector> {
+ let kq = syscall!(kqueue())?;
+ let selector = Selector {
+ #[cfg(debug_assertions)]
+ id: NEXT_ID.fetch_add(1, Ordering::Relaxed),
+ kq,
+ #[cfg(debug_assertions)]
+ has_waker: AtomicBool::new(false),
+ };
+
+ syscall!(fcntl(kq, libc::F_SETFD, libc::FD_CLOEXEC))?;
+ Ok(selector)
+ }
+
+ pub fn try_clone(&self) -> io::Result<Selector> {
+ syscall!(fcntl(self.kq, libc::F_DUPFD_CLOEXEC, super::LOWEST_FD)).map(|kq| Selector {
+ // It's the same selector, so we use the same id.
+ #[cfg(debug_assertions)]
+ id: self.id,
+ kq,
+ #[cfg(debug_assertions)]
+ has_waker: AtomicBool::new(self.has_waker.load(Ordering::Acquire)),
+ })
+ }
+
+ pub fn select(&self, events: &mut Events, timeout: Option<Duration>) -> io::Result<()> {
+ let timeout = timeout.map(|to| libc::timespec {
+ tv_sec: cmp::min(to.as_secs(), libc::time_t::max_value() as u64) as libc::time_t,
+ // `Duration::subsec_nanos` is guaranteed to be less than one
+ // billion (the number of nanoseconds in a second), making the
+ // cast to i32 safe. The cast itself is needed for platforms
+ // where C's long is only 32 bits.
+ tv_nsec: libc::c_long::from(to.subsec_nanos() as i32),
+ });
+ let timeout = timeout
+ .as_ref()
+ .map(|s| s as *const _)
+ .unwrap_or(ptr::null_mut());
+
+ events.clear();
+ syscall!(kevent(
+ self.kq,
+ ptr::null(),
+ 0,
+ events.as_mut_ptr(),
+ events.capacity() as Count,
+ timeout,
+ ))
+ .map(|n_events| {
+ // This is safe because `kevent` ensures that `n_events` are
+ // assigned.
+ unsafe { events.set_len(n_events as usize) };
+ })
+ }
+
+ pub fn register(&self, fd: RawFd, token: Token, interests: Interest) -> io::Result<()> {
+ let flags = libc::EV_CLEAR | libc::EV_RECEIPT | libc::EV_ADD;
+ // At most we need two changes, but maybe we only need 1.
+ let mut changes: [MaybeUninit<libc::kevent>; 2] =
+ [MaybeUninit::uninit(), MaybeUninit::uninit()];
+ let mut n_changes = 0;
+
+ if interests.is_writable() {
+ let kevent = kevent!(fd, libc::EVFILT_WRITE, flags, token.0);
+ changes[n_changes] = MaybeUninit::new(kevent);
+ n_changes += 1;
+ }
+
+ if interests.is_readable() {
+ let kevent = kevent!(fd, libc::EVFILT_READ, flags, token.0);
+ changes[n_changes] = MaybeUninit::new(kevent);
+ n_changes += 1;
+ }
+
+ // Older versions of macOS (OS X 10.11 and 10.10 have been witnessed)
+ // can return EPIPE when registering a pipe file descriptor where the
+ // other end has already disappeared. For example code that creates a
+ // pipe, closes a file descriptor, and then registers the other end will
+ // see an EPIPE returned from `register`.
+ //
+ // It also turns out that kevent will still report events on the file
+ // descriptor, telling us that it's readable/hup at least after we've
+ // done this registration. As a result we just ignore `EPIPE` here
+ // instead of propagating it.
+ //
+ // More info can be found at tokio-rs/mio#582.
+ let changes = unsafe {
+ // This is safe because we ensure that at least `n_changes` are in
+ // the array.
+ slice::from_raw_parts_mut(changes[0].as_mut_ptr(), n_changes)
+ };
+ kevent_register(self.kq, changes, &[libc::EPIPE as i64])
+ }
+
+ pub fn reregister(&self, fd: RawFd, token: Token, interests: Interest) -> io::Result<()> {
+ let flags = libc::EV_CLEAR | libc::EV_RECEIPT;
+ let write_flags = if interests.is_writable() {
+ flags | libc::EV_ADD
+ } else {
+ flags | libc::EV_DELETE
+ };
+ let read_flags = if interests.is_readable() {
+ flags | libc::EV_ADD
+ } else {
+ flags | libc::EV_DELETE
+ };
+
+ let mut changes: [libc::kevent; 2] = [
+ kevent!(fd, libc::EVFILT_WRITE, write_flags, token.0),
+ kevent!(fd, libc::EVFILT_READ, read_flags, token.0),
+ ];
+
+ // Since there is no way to check with which interests the fd was
+ // registered we modify both readable and write, adding it when required
+ // and removing it otherwise, ignoring the ENOENT error when it comes
+ // up. The ENOENT error informs us that a filter we're trying to remove
+ // wasn't there in first place, but we don't really care since our goal
+ // is accomplished.
+ //
+ // For the explanation of ignoring `EPIPE` see `register`.
+ kevent_register(
+ self.kq,
+ &mut changes,
+ &[libc::ENOENT as i64, libc::EPIPE as i64],
+ )
+ }
+
+ pub fn deregister(&self, fd: RawFd) -> io::Result<()> {
+ let flags = libc::EV_DELETE | libc::EV_RECEIPT;
+ let mut changes: [libc::kevent; 2] = [
+ kevent!(fd, libc::EVFILT_WRITE, flags, 0),
+ kevent!(fd, libc::EVFILT_READ, flags, 0),
+ ];
+
+ // Since there is no way to check with which interests the fd was
+ // registered we remove both filters (readable and writeable) and ignore
+ // the ENOENT error when it comes up. The ENOENT error informs us that
+ // the filter wasn't there in first place, but we don't really care
+ // about that since our goal is to remove it.
+ kevent_register(self.kq, &mut changes, &[libc::ENOENT as i64])
+ }
+
+ #[cfg(debug_assertions)]
+ pub fn register_waker(&self) -> bool {
+ self.has_waker.swap(true, Ordering::AcqRel)
+ }
+
+ // Used by `Waker`.
+ #[cfg(any(
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ pub fn setup_waker(&self, token: Token) -> io::Result<()> {
+ // First attempt to accept user space notifications.
+ let mut kevent = kevent!(
+ 0,
+ libc::EVFILT_USER,
+ libc::EV_ADD | libc::EV_CLEAR | libc::EV_RECEIPT,
+ token.0
+ );
+
+ syscall!(kevent(self.kq, &kevent, 1, &mut kevent, 1, ptr::null())).and_then(|_| {
+ if (kevent.flags & libc::EV_ERROR) != 0 && kevent.data != 0 {
+ Err(io::Error::from_raw_os_error(kevent.data as i32))
+ } else {
+ Ok(())
+ }
+ })
+ }
+
+ // Used by `Waker`.
+ #[cfg(any(
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ pub fn wake(&self, token: Token) -> io::Result<()> {
+ let mut kevent = kevent!(
+ 0,
+ libc::EVFILT_USER,
+ libc::EV_ADD | libc::EV_RECEIPT,
+ token.0
+ );
+ kevent.fflags = libc::NOTE_TRIGGER;
+
+ syscall!(kevent(self.kq, &kevent, 1, &mut kevent, 1, ptr::null())).and_then(|_| {
+ if (kevent.flags & libc::EV_ERROR) != 0 && kevent.data != 0 {
+ Err(io::Error::from_raw_os_error(kevent.data as i32))
+ } else {
+ Ok(())
+ }
+ })
+ }
+}
+
+/// Register `changes` with `kq`ueue.
+fn kevent_register(
+ kq: RawFd,
+ changes: &mut [libc::kevent],
+ ignored_errors: &[i64],
+) -> io::Result<()> {
+ syscall!(kevent(
+ kq,
+ changes.as_ptr(),
+ changes.len() as Count,
+ changes.as_mut_ptr(),
+ changes.len() as Count,
+ ptr::null(),
+ ))
+ .map(|_| ())
+ .or_else(|err| {
+ // According to the manual page of FreeBSD: "When kevent() call fails
+ // with EINTR error, all changes in the changelist have been applied",
+ // so we can safely ignore it.
+ if err.raw_os_error() == Some(libc::EINTR) {
+ Ok(())
+ } else {
+ Err(err)
+ }
+ })
+ .and_then(|()| check_errors(changes, ignored_errors))
+}
+
+/// Check all events for possible errors, it returns the first error found.
+fn check_errors(events: &[libc::kevent], ignored_errors: &[i64]) -> io::Result<()> {
+ for event in events {
+ // We can't use references to packed structures (in checking the ignored
+ // errors), so we need copy the data out before use.
+ let data = event.data as _;
+ // Check for the error flag, the actual error will be in the `data`
+ // field.
+ if (event.flags & libc::EV_ERROR != 0) && data != 0 && !ignored_errors.contains(&data) {
+ return Err(io::Error::from_raw_os_error(data as i32));
+ }
+ }
+ Ok(())
+}
+
+cfg_io_source! {
+ #[cfg(debug_assertions)]
+ impl Selector {
+ pub fn id(&self) -> usize {
+ self.id
+ }
+ }
+}
+
+impl AsRawFd for Selector {
+ fn as_raw_fd(&self) -> RawFd {
+ self.kq
+ }
+}
+
+impl Drop for Selector {
+ fn drop(&mut self) {
+ if let Err(err) = syscall!(close(self.kq)) {
+ error!("error closing kqueue: {}", err);
+ }
+ }
+}
+
+pub type Event = libc::kevent;
+pub struct Events(Vec<libc::kevent>);
+
+impl Events {
+ pub fn with_capacity(capacity: usize) -> Events {
+ Events(Vec::with_capacity(capacity))
+ }
+}
+
+impl Deref for Events {
+ type Target = Vec<libc::kevent>;
+
+ fn deref(&self) -> &Self::Target {
+ &self.0
+ }
+}
+
+impl DerefMut for Events {
+ fn deref_mut(&mut self) -> &mut Self::Target {
+ &mut self.0
+ }
+}
+
+// `Events` cannot derive `Send` or `Sync` because of the
+// `udata: *mut ::c_void` field in `libc::kevent`. However, `Events`'s public
+// API treats the `udata` field as a `uintptr_t` which is `Send`. `Sync` is
+// safe because with a `events: &Events` value, the only access to the `udata`
+// field is through `fn token(event: &Event)` which cannot mutate the field.
+unsafe impl Send for Events {}
+unsafe impl Sync for Events {}
+
+pub mod event {
+ use std::fmt;
+
+ use crate::sys::Event;
+ use crate::Token;
+
+ use super::{Filter, Flags};
+
+ pub fn token(event: &Event) -> Token {
+ Token(event.udata as usize)
+ }
+
+ pub fn is_readable(event: &Event) -> bool {
+ event.filter == libc::EVFILT_READ || {
+ #[cfg(any(
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ // Used by the `Awakener`. On platforms that use `eventfd` or a unix
+ // pipe it will emit a readable event so we'll fake that here as
+ // well.
+ {
+ event.filter == libc::EVFILT_USER
+ }
+ #[cfg(not(any(
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ )))]
+ {
+ false
+ }
+ }
+ }
+
+ pub fn is_writable(event: &Event) -> bool {
+ event.filter == libc::EVFILT_WRITE
+ }
+
+ pub fn is_error(event: &Event) -> bool {
+ (event.flags & libc::EV_ERROR) != 0 ||
+ // When the read end of the socket is closed, EV_EOF is set on
+ // flags, and fflags contains the error if there is one.
+ (event.flags & libc::EV_EOF) != 0 && event.fflags != 0
+ }
+
+ pub fn is_read_closed(event: &Event) -> bool {
+ event.filter == libc::EVFILT_READ && event.flags & libc::EV_EOF != 0
+ }
+
+ pub fn is_write_closed(event: &Event) -> bool {
+ event.filter == libc::EVFILT_WRITE && event.flags & libc::EV_EOF != 0
+ }
+
+ pub fn is_priority(_: &Event) -> bool {
+ // kqueue doesn't have priority indicators.
+ false
+ }
+
+ #[allow(unused_variables)] // `event` is not used on some platforms.
+ pub fn is_aio(event: &Event) -> bool {
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ {
+ event.filter == libc::EVFILT_AIO
+ }
+ #[cfg(not(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ )))]
+ {
+ false
+ }
+ }
+
+ #[allow(unused_variables)] // `event` is only used on FreeBSD.
+ pub fn is_lio(event: &Event) -> bool {
+ #[cfg(target_os = "freebsd")]
+ {
+ event.filter == libc::EVFILT_LIO
+ }
+ #[cfg(not(target_os = "freebsd"))]
+ {
+ false
+ }
+ }
+
+ pub fn debug_details(f: &mut fmt::Formatter<'_>, event: &Event) -> fmt::Result {
+ debug_detail!(
+ FilterDetails(Filter),
+ PartialEq::eq,
+ libc::EVFILT_READ,
+ libc::EVFILT_WRITE,
+ libc::EVFILT_AIO,
+ libc::EVFILT_VNODE,
+ libc::EVFILT_PROC,
+ libc::EVFILT_SIGNAL,
+ libc::EVFILT_TIMER,
+ #[cfg(target_os = "freebsd")]
+ libc::EVFILT_PROCDESC,
+ #[cfg(any(
+ target_os = "freebsd",
+ target_os = "dragonfly",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ libc::EVFILT_FS,
+ #[cfg(target_os = "freebsd")]
+ libc::EVFILT_LIO,
+ #[cfg(any(
+ target_os = "freebsd",
+ target_os = "dragonfly",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ libc::EVFILT_USER,
+ #[cfg(target_os = "freebsd")]
+ libc::EVFILT_SENDFILE,
+ #[cfg(target_os = "freebsd")]
+ libc::EVFILT_EMPTY,
+ #[cfg(target_os = "dragonfly")]
+ libc::EVFILT_EXCEPT,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::EVFILT_MACHPORT,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::EVFILT_VM,
+ );
+
+ #[allow(clippy::trivially_copy_pass_by_ref)]
+ fn check_flag(got: &Flags, want: &Flags) -> bool {
+ (got & want) != 0
+ }
+ debug_detail!(
+ FlagsDetails(Flags),
+ check_flag,
+ libc::EV_ADD,
+ libc::EV_DELETE,
+ libc::EV_ENABLE,
+ libc::EV_DISABLE,
+ libc::EV_ONESHOT,
+ libc::EV_CLEAR,
+ libc::EV_RECEIPT,
+ libc::EV_DISPATCH,
+ #[cfg(target_os = "freebsd")]
+ libc::EV_DROP,
+ libc::EV_FLAG1,
+ libc::EV_ERROR,
+ libc::EV_EOF,
+ libc::EV_SYSFLAGS,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::EV_FLAG0,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::EV_POLL,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::EV_OOBAND,
+ #[cfg(target_os = "dragonfly")]
+ libc::EV_NODATA,
+ );
+
+ #[allow(clippy::trivially_copy_pass_by_ref)]
+ fn check_fflag(got: &u32, want: &u32) -> bool {
+ (got & want) != 0
+ }
+ debug_detail!(
+ FflagsDetails(u32),
+ check_fflag,
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ libc::NOTE_TRIGGER,
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ libc::NOTE_FFNOP,
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ libc::NOTE_FFAND,
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ libc::NOTE_FFOR,
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ libc::NOTE_FFCOPY,
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ libc::NOTE_FFCTRLMASK,
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ libc::NOTE_FFLAGSMASK,
+ libc::NOTE_LOWAT,
+ libc::NOTE_DELETE,
+ libc::NOTE_WRITE,
+ #[cfg(target_os = "dragonfly")]
+ libc::NOTE_OOB,
+ #[cfg(target_os = "openbsd")]
+ libc::NOTE_EOF,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_EXTEND,
+ libc::NOTE_ATTRIB,
+ libc::NOTE_LINK,
+ libc::NOTE_RENAME,
+ libc::NOTE_REVOKE,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_NONE,
+ #[cfg(any(target_os = "openbsd"))]
+ libc::NOTE_TRUNCATE,
+ libc::NOTE_EXIT,
+ libc::NOTE_FORK,
+ libc::NOTE_EXEC,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_SIGNAL,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_EXITSTATUS,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_EXIT_DETAIL,
+ libc::NOTE_PDATAMASK,
+ libc::NOTE_PCTRLMASK,
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ ))]
+ libc::NOTE_TRACK,
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ ))]
+ libc::NOTE_TRACKERR,
+ #[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ ))]
+ libc::NOTE_CHILD,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_EXIT_DETAIL_MASK,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_EXIT_DECRYPTFAIL,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_EXIT_MEMORY,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_EXIT_CSERROR,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_VM_PRESSURE,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_VM_PRESSURE_TERMINATE,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_VM_PRESSURE_SUDDEN_TERMINATE,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_VM_ERROR,
+ #[cfg(any(
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_SECONDS,
+ #[cfg(any(target_os = "freebsd"))]
+ libc::NOTE_MSECONDS,
+ #[cfg(any(
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_USECONDS,
+ #[cfg(any(
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_NSECONDS,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_ABSOLUTE,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_LEEWAY,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_CRITICAL,
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos"
+ ))]
+ libc::NOTE_BACKGROUND,
+ );
+
+ // Can't reference fields in packed structures.
+ let ident = event.ident;
+ let data = event.data;
+ let udata = event.udata;
+ f.debug_struct("kevent")
+ .field("ident", &ident)
+ .field("filter", &FilterDetails(event.filter))
+ .field("flags", &FlagsDetails(event.flags))
+ .field("fflags", &FflagsDetails(event.fflags))
+ .field("data", &data)
+ .field("udata", &udata)
+ .finish()
+ }
+}
+
+#[test]
+#[cfg(feature = "os-ext")]
+fn does_not_register_rw() {
+ use crate::unix::SourceFd;
+ use crate::{Poll, Token};
+
+ let kq = unsafe { libc::kqueue() };
+ let mut kqf = SourceFd(&kq);
+ let poll = Poll::new().unwrap();
+
+ // Registering kqueue fd will fail if write is requested (On anything but
+ // some versions of macOS).
+ poll.registry()
+ .register(&mut kqf, Token(1234), Interest::READABLE)
+ .unwrap();
+}
diff --git a/mio/src/sys/unix/selector/mod.rs b/mio/src/sys/unix/selector/mod.rs
new file mode 100644
index 0000000..3ccbdea
--- /dev/null
+++ b/mio/src/sys/unix/selector/mod.rs
@@ -0,0 +1,49 @@
+#[cfg(any(
+ target_os = "android",
+ target_os = "illumos",
+ target_os = "linux",
+ target_os = "redox",
+))]
+mod epoll;
+
+#[cfg(any(
+ target_os = "android",
+ target_os = "illumos",
+ target_os = "linux",
+ target_os = "redox",
+))]
+pub(crate) use self::epoll::{event, Event, Events, Selector};
+
+#[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ target_os = "tvos",
+ target_os = "watchos",
+))]
+mod kqueue;
+
+#[cfg(any(
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ target_os = "tvos",
+ target_os = "watchos",
+))]
+pub(crate) use self::kqueue::{event, Event, Events, Selector};
+
+/// Lowest file descriptor used in `Selector::try_clone`.
+///
+/// # Notes
+///
+/// Usually fds 0, 1 and 2 are standard in, out and error. Some application
+/// blindly assume this to be true, which means using any one of those a select
+/// could result in some interesting and unexpected errors. Avoid that by using
+/// an fd that doesn't have a pre-determined usage.
+const LOWEST_FD: libc::c_int = 3;
diff --git a/mio/src/sys/unix/sourcefd.rs b/mio/src/sys/unix/sourcefd.rs
new file mode 100644
index 0000000..84e776d
--- /dev/null
+++ b/mio/src/sys/unix/sourcefd.rs
@@ -0,0 +1,116 @@
+use crate::{event, Interest, Registry, Token};
+
+use std::io;
+use std::os::unix::io::RawFd;
+
+/// Adapter for [`RawFd`] providing an [`event::Source`] implementation.
+///
+/// `SourceFd` enables registering any type with an FD with [`Poll`].
+///
+/// While only implementations for TCP and UDP are provided, Mio supports
+/// registering any FD that can be registered with the underlying OS selector.
+/// `SourceFd` provides the necessary bridge.
+///
+/// Note that `SourceFd` takes a `&RawFd`. This is because `SourceFd` **does
+/// not** take ownership of the FD. Specifically, it will not manage any
+/// lifecycle related operations, such as closing the FD on drop. It is expected
+/// that the `SourceFd` is constructed right before a call to
+/// [`Registry::register`]. See the examples for more detail.
+///
+/// [`event::Source`]: ../event/trait.Source.html
+/// [`Poll`]: ../struct.Poll.html
+/// [`Registry::register`]: ../struct.Registry.html#method.register
+///
+/// # Examples
+///
+/// Basic usage.
+///
+#[cfg_attr(
+ all(feature = "os-poll", feature = "net", feature = "os-ext"),
+ doc = "```"
+)]
+#[cfg_attr(
+ not(all(feature = "os-poll", feature = "net", feature = "os-ext")),
+ doc = "```ignore"
+)]
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// use mio::{Interest, Poll, Token};
+/// use mio::unix::SourceFd;
+///
+/// use std::os::unix::io::AsRawFd;
+/// use std::net::TcpListener;
+///
+/// // Bind a std listener
+/// let listener = TcpListener::bind("127.0.0.1:0")?;
+///
+/// let poll = Poll::new()?;
+///
+/// // Register the listener
+/// poll.registry().register(
+/// &mut SourceFd(&listener.as_raw_fd()),
+/// Token(0),
+/// Interest::READABLE)?;
+/// # Ok(())
+/// # }
+/// ```
+///
+/// Implementing [`event::Source`] for a custom type backed by a [`RawFd`].
+///
+#[cfg_attr(all(feature = "os-poll", feature = "os-ext"), doc = "```")]
+#[cfg_attr(not(all(feature = "os-poll", feature = "os-ext")), doc = "```ignore")]
+/// use mio::{event, Interest, Registry, Token};
+/// use mio::unix::SourceFd;
+///
+/// use std::os::unix::io::RawFd;
+/// use std::io;
+///
+/// # #[allow(dead_code)]
+/// pub struct MyIo {
+/// fd: RawFd,
+/// }
+///
+/// impl event::Source for MyIo {
+/// fn register(&mut self, registry: &Registry, token: Token, interests: Interest)
+/// -> io::Result<()>
+/// {
+/// SourceFd(&self.fd).register(registry, token, interests)
+/// }
+///
+/// fn reregister(&mut self, registry: &Registry, token: Token, interests: Interest)
+/// -> io::Result<()>
+/// {
+/// SourceFd(&self.fd).reregister(registry, token, interests)
+/// }
+///
+/// fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+/// SourceFd(&self.fd).deregister(registry)
+/// }
+/// }
+/// ```
+#[derive(Debug)]
+pub struct SourceFd<'a>(pub &'a RawFd);
+
+impl<'a> event::Source for SourceFd<'a> {
+ fn register(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ registry.selector().register(*self.0, token, interests)
+ }
+
+ fn reregister(
+ &mut self,
+ registry: &Registry,
+ token: Token,
+ interests: Interest,
+ ) -> io::Result<()> {
+ registry.selector().reregister(*self.0, token, interests)
+ }
+
+ fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
+ registry.selector().deregister(*self.0)
+ }
+}
diff --git a/mio/src/sys/unix/tcp.rs b/mio/src/sys/unix/tcp.rs
new file mode 100644
index 0000000..48cf8d9
--- /dev/null
+++ b/mio/src/sys/unix/tcp.rs
@@ -0,0 +1,113 @@
+use std::convert::TryInto;
+use std::io;
+use std::mem::{size_of, MaybeUninit};
+use std::net::{self, SocketAddr};
+use std::os::unix::io::{AsRawFd, FromRawFd};
+
+use crate::sys::unix::net::{new_socket, socket_addr, to_socket_addr};
+
+pub(crate) fn new_for_addr(address: SocketAddr) -> io::Result<libc::c_int> {
+ let domain = match address {
+ SocketAddr::V4(_) => libc::AF_INET,
+ SocketAddr::V6(_) => libc::AF_INET6,
+ };
+ new_socket(domain, libc::SOCK_STREAM)
+}
+
+pub(crate) fn bind(socket: &net::TcpListener, addr: SocketAddr) -> io::Result<()> {
+ let (raw_addr, raw_addr_length) = socket_addr(&addr);
+ syscall!(bind(socket.as_raw_fd(), raw_addr.as_ptr(), raw_addr_length))?;
+ Ok(())
+}
+
+pub(crate) fn connect(socket: &net::TcpStream, addr: SocketAddr) -> io::Result<()> {
+ let (raw_addr, raw_addr_length) = socket_addr(&addr);
+
+ match syscall!(connect(
+ socket.as_raw_fd(),
+ raw_addr.as_ptr(),
+ raw_addr_length
+ )) {
+ Err(err) if err.raw_os_error() != Some(libc::EINPROGRESS) => Err(err),
+ _ => Ok(()),
+ }
+}
+
+pub(crate) fn listen(socket: &net::TcpListener, backlog: u32) -> io::Result<()> {
+ let backlog = backlog.try_into().unwrap_or(i32::max_value());
+ syscall!(listen(socket.as_raw_fd(), backlog))?;
+ Ok(())
+}
+
+pub(crate) fn set_reuseaddr(socket: &net::TcpListener, reuseaddr: bool) -> io::Result<()> {
+ let val: libc::c_int = i32::from(reuseaddr);
+ syscall!(setsockopt(
+ socket.as_raw_fd(),
+ libc::SOL_SOCKET,
+ libc::SO_REUSEADDR,
+ &val as *const libc::c_int as *const libc::c_void,
+ size_of::<libc::c_int>() as libc::socklen_t,
+ ))?;
+ Ok(())
+}
+
+pub(crate) fn accept(listener: &net::TcpListener) -> io::Result<(net::TcpStream, SocketAddr)> {
+ let mut addr: MaybeUninit<libc::sockaddr_storage> = MaybeUninit::uninit();
+ let mut length = size_of::<libc::sockaddr_storage>() as libc::socklen_t;
+
+ // On platforms that support it we can use `accept4(2)` to set `NONBLOCK`
+ // and `CLOEXEC` in the call to accept the connection.
+ #[cfg(any(
+ // Android x86's seccomp profile forbids calls to `accept4(2)`
+ // See https://github.com/tokio-rs/mio/issues/1445 for details
+ all(not(target_arch="x86"), target_os = "android"),
+ target_os = "dragonfly",
+ target_os = "freebsd",
+ target_os = "illumos",
+ target_os = "linux",
+ target_os = "netbsd",
+ target_os = "openbsd",
+ ))]
+ let stream = {
+ syscall!(accept4(
+ listener.as_raw_fd(),
+ addr.as_mut_ptr() as *mut _,
+ &mut length,
+ libc::SOCK_CLOEXEC | libc::SOCK_NONBLOCK,
+ ))
+ .map(|socket| unsafe { net::TcpStream::from_raw_fd(socket) })
+ }?;
+
+ // But not all platforms have the `accept4(2)` call. Luckily BSD (derived)
+ // OSes inherit the non-blocking flag from the listener, so we just have to
+ // set `CLOEXEC`.
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "redox",
+ target_os = "tvos",
+ target_os = "watchos",
+ all(target_arch = "x86", target_os = "android"),
+ ))]
+ let stream = {
+ syscall!(accept(
+ listener.as_raw_fd(),
+ addr.as_mut_ptr() as *mut _,
+ &mut length
+ ))
+ .map(|socket| unsafe { net::TcpStream::from_raw_fd(socket) })
+ .and_then(|s| {
+ syscall!(fcntl(s.as_raw_fd(), libc::F_SETFD, libc::FD_CLOEXEC))?;
+
+ // See https://github.com/tokio-rs/mio/issues/1450
+ #[cfg(all(target_arch = "x86", target_os = "android"))]
+ syscall!(fcntl(s.as_raw_fd(), libc::F_SETFL, libc::O_NONBLOCK))?;
+
+ Ok(s)
+ })
+ }?;
+
+ // This is safe because `accept` calls above ensures the address
+ // initialised.
+ unsafe { to_socket_addr(addr.as_ptr()) }.map(|addr| (stream, addr))
+}
diff --git a/mio/src/sys/unix/udp.rs b/mio/src/sys/unix/udp.rs
new file mode 100644
index 0000000..843ae88
--- /dev/null
+++ b/mio/src/sys/unix/udp.rs
@@ -0,0 +1,31 @@
+use crate::sys::unix::net::{new_ip_socket, socket_addr};
+
+use std::io;
+use std::mem;
+use std::net::{self, SocketAddr};
+use std::os::unix::io::{AsRawFd, FromRawFd};
+
+pub fn bind(addr: SocketAddr) -> io::Result<net::UdpSocket> {
+ let fd = new_ip_socket(addr, libc::SOCK_DGRAM)?;
+ let socket = unsafe { net::UdpSocket::from_raw_fd(fd) };
+
+ let (raw_addr, raw_addr_length) = socket_addr(&addr);
+ syscall!(bind(fd, raw_addr.as_ptr(), raw_addr_length))?;
+
+ Ok(socket)
+}
+
+pub(crate) fn only_v6(socket: &net::UdpSocket) -> io::Result<bool> {
+ let mut optval: libc::c_int = 0;
+ let mut optlen = mem::size_of::<libc::c_int>() as libc::socklen_t;
+
+ syscall!(getsockopt(
+ socket.as_raw_fd(),
+ libc::IPPROTO_IPV6,
+ libc::IPV6_V6ONLY,
+ &mut optval as *mut _ as *mut _,
+ &mut optlen,
+ ))?;
+
+ Ok(optval != 0)
+}
diff --git a/mio/src/sys/unix/uds/datagram.rs b/mio/src/sys/unix/uds/datagram.rs
new file mode 100644
index 0000000..a5ada72
--- /dev/null
+++ b/mio/src/sys/unix/uds/datagram.rs
@@ -0,0 +1,56 @@
+use super::{socket_addr, SocketAddr};
+use crate::sys::unix::net::new_socket;
+
+use std::io;
+use std::os::unix::io::{AsRawFd, FromRawFd};
+use std::os::unix::net;
+use std::path::Path;
+
+pub(crate) fn bind(path: &Path) -> io::Result<net::UnixDatagram> {
+ let (sockaddr, socklen) = socket_addr(path)?;
+ let sockaddr = &sockaddr as *const libc::sockaddr_un as *const _;
+
+ let socket = unbound()?;
+ syscall!(bind(socket.as_raw_fd(), sockaddr, socklen))?;
+
+ Ok(socket)
+}
+
+pub(crate) fn unbound() -> io::Result<net::UnixDatagram> {
+ let fd = new_socket(libc::AF_UNIX, libc::SOCK_DGRAM)?;
+ Ok(unsafe { net::UnixDatagram::from_raw_fd(fd) })
+}
+
+pub(crate) fn pair() -> io::Result<(net::UnixDatagram, net::UnixDatagram)> {
+ super::pair(libc::SOCK_DGRAM)
+}
+
+pub(crate) fn local_addr(socket: &net::UnixDatagram) -> io::Result<SocketAddr> {
+ super::local_addr(socket.as_raw_fd())
+}
+
+pub(crate) fn peer_addr(socket: &net::UnixDatagram) -> io::Result<SocketAddr> {
+ super::peer_addr(socket.as_raw_fd())
+}
+
+pub(crate) fn recv_from(
+ socket: &net::UnixDatagram,
+ dst: &mut [u8],
+) -> io::Result<(usize, SocketAddr)> {
+ let mut count = 0;
+ let socketaddr = SocketAddr::new(|sockaddr, socklen| {
+ syscall!(recvfrom(
+ socket.as_raw_fd(),
+ dst.as_mut_ptr() as *mut _,
+ dst.len(),
+ 0,
+ sockaddr,
+ socklen,
+ ))
+ .map(|c| {
+ count = c;
+ c as libc::c_int
+ })
+ })?;
+ Ok((count as usize, socketaddr))
+}
diff --git a/mio/src/sys/unix/uds/listener.rs b/mio/src/sys/unix/uds/listener.rs
new file mode 100644
index 0000000..52387a5
--- /dev/null
+++ b/mio/src/sys/unix/uds/listener.rs
@@ -0,0 +1,93 @@
+use super::socket_addr;
+use crate::net::{SocketAddr, UnixStream};
+use crate::sys::unix::net::new_socket;
+use std::os::unix::io::{AsRawFd, FromRawFd};
+use std::os::unix::net;
+use std::path::Path;
+use std::{io, mem};
+
+pub(crate) fn bind(path: &Path) -> io::Result<net::UnixListener> {
+ let (sockaddr, socklen) = socket_addr(path)?;
+ let sockaddr = &sockaddr as *const libc::sockaddr_un as *const libc::sockaddr;
+
+ let fd = new_socket(libc::AF_UNIX, libc::SOCK_STREAM)?;
+ let socket = unsafe { net::UnixListener::from_raw_fd(fd) };
+ syscall!(bind(fd, sockaddr, socklen))?;
+ syscall!(listen(fd, 1024))?;
+
+ Ok(socket)
+}
+
+pub(crate) fn accept(listener: &net::UnixListener) -> io::Result<(UnixStream, SocketAddr)> {
+ let sockaddr = mem::MaybeUninit::<libc::sockaddr_un>::zeroed();
+
+ // This is safe to assume because a `libc::sockaddr_un` filled with `0`
+ // bytes is properly initialized.
+ //
+ // `0` is a valid value for `sockaddr_un::sun_family`; it is
+ // `libc::AF_UNSPEC`.
+ //
+ // `[0; 108]` is a valid value for `sockaddr_un::sun_path`; it begins an
+ // abstract path.
+ let mut sockaddr = unsafe { sockaddr.assume_init() };
+
+ sockaddr.sun_family = libc::AF_UNIX as libc::sa_family_t;
+ let mut socklen = mem::size_of_val(&sockaddr) as libc::socklen_t;
+
+ #[cfg(not(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "netbsd",
+ target_os = "redox",
+ target_os = "tvos",
+ target_os = "watchos",
+ // Android x86's seccomp profile forbids calls to `accept4(2)`
+ // See https://github.com/tokio-rs/mio/issues/1445 for details
+ all(target_arch = "x86", target_os = "android"),
+ )))]
+ let socket = {
+ let flags = libc::SOCK_NONBLOCK | libc::SOCK_CLOEXEC;
+ syscall!(accept4(
+ listener.as_raw_fd(),
+ &mut sockaddr as *mut libc::sockaddr_un as *mut libc::sockaddr,
+ &mut socklen,
+ flags
+ ))
+ .map(|socket| unsafe { net::UnixStream::from_raw_fd(socket) })
+ };
+
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "netbsd",
+ target_os = "redox",
+ target_os = "tvos",
+ target_os = "watchos",
+ all(target_arch = "x86", target_os = "android")
+ ))]
+ let socket = syscall!(accept(
+ listener.as_raw_fd(),
+ &mut sockaddr as *mut libc::sockaddr_un as *mut libc::sockaddr,
+ &mut socklen,
+ ))
+ .and_then(|socket| {
+ // Ensure the socket is closed if either of the `fcntl` calls
+ // error below.
+ let s = unsafe { net::UnixStream::from_raw_fd(socket) };
+ syscall!(fcntl(socket, libc::F_SETFD, libc::FD_CLOEXEC))?;
+
+ // See https://github.com/tokio-rs/mio/issues/1450
+ #[cfg(all(target_arch = "x86", target_os = "android"))]
+ syscall!(fcntl(socket, libc::F_SETFL, libc::O_NONBLOCK))?;
+
+ Ok(s)
+ });
+
+ socket
+ .map(UnixStream::from_std)
+ .map(|stream| (stream, SocketAddr::from_parts(sockaddr, socklen)))
+}
+
+pub(crate) fn local_addr(listener: &net::UnixListener) -> io::Result<SocketAddr> {
+ super::local_addr(listener.as_raw_fd())
+}
diff --git a/mio/src/sys/unix/uds/mod.rs b/mio/src/sys/unix/uds/mod.rs
new file mode 100644
index 0000000..ed355ce
--- /dev/null
+++ b/mio/src/sys/unix/uds/mod.rs
@@ -0,0 +1,159 @@
+mod socketaddr;
+pub use self::socketaddr::SocketAddr;
+
+/// Get the `sun_path` field offset of `sockaddr_un` for the target OS.
+///
+/// On Linux, this function equates to the same value as
+/// `size_of::<sa_family_t>()`, but some other implementations include
+/// other fields before `sun_path`, so the expression more portably
+/// describes the size of the address structure.
+pub(in crate::sys) fn path_offset(sockaddr: &libc::sockaddr_un) -> usize {
+ let base = sockaddr as *const _ as usize;
+ let path = &sockaddr.sun_path as *const _ as usize;
+ path - base
+}
+
+cfg_os_poll! {
+ use std::cmp::Ordering;
+ use std::os::unix::ffi::OsStrExt;
+ use std::os::unix::io::{RawFd, FromRawFd};
+ use std::path::Path;
+ use std::{io, mem};
+
+ pub(crate) mod datagram;
+ pub(crate) mod listener;
+ pub(crate) mod stream;
+
+ pub(in crate::sys) fn socket_addr(path: &Path) -> io::Result<(libc::sockaddr_un, libc::socklen_t)> {
+ let sockaddr = mem::MaybeUninit::<libc::sockaddr_un>::zeroed();
+
+ // This is safe to assume because a `libc::sockaddr_un` filled with `0`
+ // bytes is properly initialized.
+ //
+ // `0` is a valid value for `sockaddr_un::sun_family`; it is
+ // `libc::AF_UNSPEC`.
+ //
+ // `[0; 108]` is a valid value for `sockaddr_un::sun_path`; it begins an
+ // abstract path.
+ let mut sockaddr = unsafe { sockaddr.assume_init() };
+
+ sockaddr.sun_family = libc::AF_UNIX as libc::sa_family_t;
+
+ let bytes = path.as_os_str().as_bytes();
+ match (bytes.first(), bytes.len().cmp(&sockaddr.sun_path.len())) {
+ // Abstract paths don't need a null terminator
+ (Some(&0), Ordering::Greater) => {
+ return Err(io::Error::new(
+ io::ErrorKind::InvalidInput,
+ "path must be no longer than libc::sockaddr_un.sun_path",
+ ));
+ }
+ (_, Ordering::Greater) | (_, Ordering::Equal) => {
+ return Err(io::Error::new(
+ io::ErrorKind::InvalidInput,
+ "path must be shorter than libc::sockaddr_un.sun_path",
+ ));
+ }
+ _ => {}
+ }
+
+ for (dst, src) in sockaddr.sun_path.iter_mut().zip(bytes.iter()) {
+ *dst = *src as libc::c_char;
+ }
+
+ let offset = path_offset(&sockaddr);
+ let mut socklen = offset + bytes.len();
+
+ match bytes.first() {
+ // The struct has already been zeroes so the null byte for pathname
+ // addresses is already there.
+ Some(&0) | None => {}
+ Some(_) => socklen += 1,
+ }
+
+ Ok((sockaddr, socklen as libc::socklen_t))
+ }
+
+ fn pair<T>(flags: libc::c_int) -> io::Result<(T, T)>
+ where T: FromRawFd,
+ {
+ #[cfg(not(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ )))]
+ let flags = flags | libc::SOCK_NONBLOCK | libc::SOCK_CLOEXEC;
+
+ let mut fds = [-1; 2];
+ syscall!(socketpair(libc::AF_UNIX, flags, 0, fds.as_mut_ptr()))?;
+ let pair = unsafe { (T::from_raw_fd(fds[0]), T::from_raw_fd(fds[1])) };
+
+ // Darwin doesn't have SOCK_NONBLOCK or SOCK_CLOEXEC.
+ //
+ // In order to set those flags, additional `fcntl` sys calls must be
+ // performed. If a `fnctl` fails after the sockets have been created,
+ // the file descriptors will leak. Creating `pair` above ensures that if
+ // there is an error, the file descriptors are closed.
+ #[cfg(any(
+ target_os = "ios",
+ target_os = "macos",
+ target_os = "tvos",
+ target_os = "watchos",
+ ))]
+ {
+ syscall!(fcntl(fds[0], libc::F_SETFL, libc::O_NONBLOCK))?;
+ syscall!(fcntl(fds[0], libc::F_SETFD, libc::FD_CLOEXEC))?;
+ syscall!(fcntl(fds[1], libc::F_SETFL, libc::O_NONBLOCK))?;
+ syscall!(fcntl(fds[1], libc::F_SETFD, libc::FD_CLOEXEC))?;
+ }
+ Ok(pair)
+ }
+
+ // The following functions can't simply be replaced with a call to
+ // `net::UnixDatagram` because of our `SocketAddr` type.
+
+ fn local_addr(socket: RawFd) -> io::Result<SocketAddr> {
+ SocketAddr::new(|sockaddr, socklen| syscall!(getsockname(socket, sockaddr, socklen)))
+ }
+
+ fn peer_addr(socket: RawFd) -> io::Result<SocketAddr> {
+ SocketAddr::new(|sockaddr, socklen| syscall!(getpeername(socket, sockaddr, socklen)))
+ }
+
+ #[cfg(test)]
+ mod tests {
+ use super::{path_offset, socket_addr};
+ use std::path::Path;
+ use std::str;
+
+ #[test]
+ fn pathname_address() {
+ const PATH: &str = "./foo/bar.txt";
+ const PATH_LEN: usize = 13;
+
+ // Pathname addresses do have a null terminator, so `socklen` is
+ // expected to be `PATH_LEN` + `offset` + 1.
+ let path = Path::new(PATH);
+ let (sockaddr, actual) = socket_addr(path).unwrap();
+ let offset = path_offset(&sockaddr);
+ let expected = PATH_LEN + offset + 1;
+ assert_eq!(expected as libc::socklen_t, actual)
+ }
+
+ #[test]
+ fn abstract_address() {
+ const PATH: &[u8] = &[0, 116, 111, 107, 105, 111];
+ const PATH_LEN: usize = 6;
+
+ // Abstract addresses do not have a null terminator, so `socklen` is
+ // expected to be `PATH_LEN` + `offset`.
+ let abstract_path = str::from_utf8(PATH).unwrap();
+ let path = Path::new(abstract_path);
+ let (sockaddr, actual) = socket_addr(path).unwrap();
+ let offset = path_offset(&sockaddr);
+ let expected = PATH_LEN + offset;
+ assert_eq!(expected as libc::socklen_t, actual)
+ }
+ }
+}
diff --git a/mio/src/sys/unix/uds/socketaddr.rs b/mio/src/sys/unix/uds/socketaddr.rs
new file mode 100644
index 0000000..4c7c411
--- /dev/null
+++ b/mio/src/sys/unix/uds/socketaddr.rs
@@ -0,0 +1,130 @@
+use super::path_offset;
+use std::ffi::OsStr;
+use std::os::unix::ffi::OsStrExt;
+use std::path::Path;
+use std::{ascii, fmt};
+
+/// An address associated with a `mio` specific Unix socket.
+///
+/// This is implemented instead of imported from [`net::SocketAddr`] because
+/// there is no way to create a [`net::SocketAddr`]. One must be returned by
+/// [`accept`], so this is returned instead.
+///
+/// [`net::SocketAddr`]: std::os::unix::net::SocketAddr
+/// [`accept`]: #method.accept
+pub struct SocketAddr {
+ sockaddr: libc::sockaddr_un,
+ socklen: libc::socklen_t,
... 37520 lines suppressed ...
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