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Posted to common-commits@hadoop.apache.org by wh...@apache.org on 2015/07/07 23:32:31 UTC
[44/50] [abbrv] hadoop git commit: HDFS-8724. Import third_party
libraries into the repository.
http://git-wip-us.apache.org/repos/asf/hadoop/blob/5b1aba70/hadoop-hdfs-project/hadoop-hdfs-client/src/main/native/libhdfspp/third_party/asio-1.10.2/include/asio/basic_stream_socket.hpp
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diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/native/libhdfspp/third_party/asio-1.10.2/include/asio/basic_stream_socket.hpp b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/native/libhdfspp/third_party/asio-1.10.2/include/asio/basic_stream_socket.hpp
new file mode 100644
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+//
+// basic_stream_socket.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef ASIO_BASIC_STREAM_SOCKET_HPP
+#define ASIO_BASIC_STREAM_SOCKET_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+#include <cstddef>
+#include "asio/async_result.hpp"
+#include "asio/basic_socket.hpp"
+#include "asio/detail/handler_type_requirements.hpp"
+#include "asio/detail/throw_error.hpp"
+#include "asio/error.hpp"
+#include "asio/stream_socket_service.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+
+/// Provides stream-oriented socket functionality.
+/**
+ * The basic_stream_socket class template provides asynchronous and blocking
+ * stream-oriented socket functionality.
+ *
+ * @par Thread Safety
+ * @e Distinct @e objects: Safe.@n
+ * @e Shared @e objects: Unsafe.
+ *
+ * @par Concepts:
+ * AsyncReadStream, AsyncWriteStream, Stream, SyncReadStream, SyncWriteStream.
+ */
+template <typename Protocol,
+ typename StreamSocketService = stream_socket_service<Protocol> >
+class basic_stream_socket
+ : public basic_socket<Protocol, StreamSocketService>
+{
+public:
+ /// (Deprecated: Use native_handle_type.) The native representation of a
+ /// socket.
+ typedef typename StreamSocketService::native_handle_type native_type;
+
+ /// The native representation of a socket.
+ typedef typename StreamSocketService::native_handle_type native_handle_type;
+
+ /// The protocol type.
+ typedef Protocol protocol_type;
+
+ /// The endpoint type.
+ typedef typename Protocol::endpoint endpoint_type;
+
+ /// Construct a basic_stream_socket without opening it.
+ /**
+ * This constructor creates a stream socket without opening it. The socket
+ * needs to be opened and then connected or accepted before data can be sent
+ * or received on it.
+ *
+ * @param io_service The io_service object that the stream socket will use to
+ * dispatch handlers for any asynchronous operations performed on the socket.
+ */
+ explicit basic_stream_socket(asio::io_service& io_service)
+ : basic_socket<Protocol, StreamSocketService>(io_service)
+ {
+ }
+
+ /// Construct and open a basic_stream_socket.
+ /**
+ * This constructor creates and opens a stream socket. The socket needs to be
+ * connected or accepted before data can be sent or received on it.
+ *
+ * @param io_service The io_service object that the stream socket will use to
+ * dispatch handlers for any asynchronous operations performed on the socket.
+ *
+ * @param protocol An object specifying protocol parameters to be used.
+ *
+ * @throws asio::system_error Thrown on failure.
+ */
+ basic_stream_socket(asio::io_service& io_service,
+ const protocol_type& protocol)
+ : basic_socket<Protocol, StreamSocketService>(io_service, protocol)
+ {
+ }
+
+ /// Construct a basic_stream_socket, opening it and binding it to the given
+ /// local endpoint.
+ /**
+ * This constructor creates a stream socket and automatically opens it bound
+ * to the specified endpoint on the local machine. The protocol used is the
+ * protocol associated with the given endpoint.
+ *
+ * @param io_service The io_service object that the stream socket will use to
+ * dispatch handlers for any asynchronous operations performed on the socket.
+ *
+ * @param endpoint An endpoint on the local machine to which the stream
+ * socket will be bound.
+ *
+ * @throws asio::system_error Thrown on failure.
+ */
+ basic_stream_socket(asio::io_service& io_service,
+ const endpoint_type& endpoint)
+ : basic_socket<Protocol, StreamSocketService>(io_service, endpoint)
+ {
+ }
+
+ /// Construct a basic_stream_socket on an existing native socket.
+ /**
+ * This constructor creates a stream socket object to hold an existing native
+ * socket.
+ *
+ * @param io_service The io_service object that the stream socket will use to
+ * dispatch handlers for any asynchronous operations performed on the socket.
+ *
+ * @param protocol An object specifying protocol parameters to be used.
+ *
+ * @param native_socket The new underlying socket implementation.
+ *
+ * @throws asio::system_error Thrown on failure.
+ */
+ basic_stream_socket(asio::io_service& io_service,
+ const protocol_type& protocol, const native_handle_type& native_socket)
+ : basic_socket<Protocol, StreamSocketService>(
+ io_service, protocol, native_socket)
+ {
+ }
+
+#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
+ /// Move-construct a basic_stream_socket from another.
+ /**
+ * This constructor moves a stream socket from one object to another.
+ *
+ * @param other The other basic_stream_socket object from which the move
+ * will occur.
+ *
+ * @note Following the move, the moved-from object is in the same state as if
+ * constructed using the @c basic_stream_socket(io_service&) constructor.
+ */
+ basic_stream_socket(basic_stream_socket&& other)
+ : basic_socket<Protocol, StreamSocketService>(
+ ASIO_MOVE_CAST(basic_stream_socket)(other))
+ {
+ }
+
+ /// Move-assign a basic_stream_socket from another.
+ /**
+ * This assignment operator moves a stream socket from one object to another.
+ *
+ * @param other The other basic_stream_socket object from which the move
+ * will occur.
+ *
+ * @note Following the move, the moved-from object is in the same state as if
+ * constructed using the @c basic_stream_socket(io_service&) constructor.
+ */
+ basic_stream_socket& operator=(basic_stream_socket&& other)
+ {
+ basic_socket<Protocol, StreamSocketService>::operator=(
+ ASIO_MOVE_CAST(basic_stream_socket)(other));
+ return *this;
+ }
+
+ /// Move-construct a basic_stream_socket from a socket of another protocol
+ /// type.
+ /**
+ * This constructor moves a stream socket from one object to another.
+ *
+ * @param other The other basic_stream_socket object from which the move
+ * will occur.
+ *
+ * @note Following the move, the moved-from object is in the same state as if
+ * constructed using the @c basic_stream_socket(io_service&) constructor.
+ */
+ template <typename Protocol1, typename StreamSocketService1>
+ basic_stream_socket(
+ basic_stream_socket<Protocol1, StreamSocketService1>&& other,
+ typename enable_if<is_convertible<Protocol1, Protocol>::value>::type* = 0)
+ : basic_socket<Protocol, StreamSocketService>(
+ ASIO_MOVE_CAST2(basic_stream_socket<
+ Protocol1, StreamSocketService1>)(other))
+ {
+ }
+
+ /// Move-assign a basic_stream_socket from a socket of another protocol type.
+ /**
+ * This assignment operator moves a stream socket from one object to another.
+ *
+ * @param other The other basic_stream_socket object from which the move
+ * will occur.
+ *
+ * @note Following the move, the moved-from object is in the same state as if
+ * constructed using the @c basic_stream_socket(io_service&) constructor.
+ */
+ template <typename Protocol1, typename StreamSocketService1>
+ typename enable_if<is_convertible<Protocol1, Protocol>::value,
+ basic_stream_socket>::type& operator=(
+ basic_stream_socket<Protocol1, StreamSocketService1>&& other)
+ {
+ basic_socket<Protocol, StreamSocketService>::operator=(
+ ASIO_MOVE_CAST2(basic_stream_socket<
+ Protocol1, StreamSocketService1>)(other));
+ return *this;
+ }
+#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
+
+ /// Send some data on the socket.
+ /**
+ * This function is used to send data on the stream socket. The function
+ * call will block until one or more bytes of the data has been sent
+ * successfully, or an until error occurs.
+ *
+ * @param buffers One or more data buffers to be sent on the socket.
+ *
+ * @returns The number of bytes sent.
+ *
+ * @throws asio::system_error Thrown on failure.
+ *
+ * @note The send operation may not transmit all of the data to the peer.
+ * Consider using the @ref write function if you need to ensure that all data
+ * is written before the blocking operation completes.
+ *
+ * @par Example
+ * To send a single data buffer use the @ref buffer function as follows:
+ * @code
+ * socket.send(asio::buffer(data, size));
+ * @endcode
+ * See the @ref buffer documentation for information on sending multiple
+ * buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename ConstBufferSequence>
+ std::size_t send(const ConstBufferSequence& buffers)
+ {
+ asio::error_code ec;
+ std::size_t s = this->get_service().send(
+ this->get_implementation(), buffers, 0, ec);
+ asio::detail::throw_error(ec, "send");
+ return s;
+ }
+
+ /// Send some data on the socket.
+ /**
+ * This function is used to send data on the stream socket. The function
+ * call will block until one or more bytes of the data has been sent
+ * successfully, or an until error occurs.
+ *
+ * @param buffers One or more data buffers to be sent on the socket.
+ *
+ * @param flags Flags specifying how the send call is to be made.
+ *
+ * @returns The number of bytes sent.
+ *
+ * @throws asio::system_error Thrown on failure.
+ *
+ * @note The send operation may not transmit all of the data to the peer.
+ * Consider using the @ref write function if you need to ensure that all data
+ * is written before the blocking operation completes.
+ *
+ * @par Example
+ * To send a single data buffer use the @ref buffer function as follows:
+ * @code
+ * socket.send(asio::buffer(data, size), 0);
+ * @endcode
+ * See the @ref buffer documentation for information on sending multiple
+ * buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename ConstBufferSequence>
+ std::size_t send(const ConstBufferSequence& buffers,
+ socket_base::message_flags flags)
+ {
+ asio::error_code ec;
+ std::size_t s = this->get_service().send(
+ this->get_implementation(), buffers, flags, ec);
+ asio::detail::throw_error(ec, "send");
+ return s;
+ }
+
+ /// Send some data on the socket.
+ /**
+ * This function is used to send data on the stream socket. The function
+ * call will block until one or more bytes of the data has been sent
+ * successfully, or an until error occurs.
+ *
+ * @param buffers One or more data buffers to be sent on the socket.
+ *
+ * @param flags Flags specifying how the send call is to be made.
+ *
+ * @param ec Set to indicate what error occurred, if any.
+ *
+ * @returns The number of bytes sent. Returns 0 if an error occurred.
+ *
+ * @note The send operation may not transmit all of the data to the peer.
+ * Consider using the @ref write function if you need to ensure that all data
+ * is written before the blocking operation completes.
+ */
+ template <typename ConstBufferSequence>
+ std::size_t send(const ConstBufferSequence& buffers,
+ socket_base::message_flags flags, asio::error_code& ec)
+ {
+ return this->get_service().send(
+ this->get_implementation(), buffers, flags, ec);
+ }
+
+ /// Start an asynchronous send.
+ /**
+ * This function is used to asynchronously send data on the stream socket.
+ * The function call always returns immediately.
+ *
+ * @param buffers One or more data buffers to be sent on the socket. Although
+ * the buffers object may be copied as necessary, ownership of the underlying
+ * memory blocks is retained by the caller, which must guarantee that they
+ * remain valid until the handler is called.
+ *
+ * @param handler The handler to be called when the send operation completes.
+ * Copies will be made of the handler as required. The function signature of
+ * the handler must be:
+ * @code void handler(
+ * const asio::error_code& error, // Result of operation.
+ * std::size_t bytes_transferred // Number of bytes sent.
+ * ); @endcode
+ * Regardless of whether the asynchronous operation completes immediately or
+ * not, the handler will not be invoked from within this function. Invocation
+ * of the handler will be performed in a manner equivalent to using
+ * asio::io_service::post().
+ *
+ * @note The send operation may not transmit all of the data to the peer.
+ * Consider using the @ref async_write function if you need to ensure that all
+ * data is written before the asynchronous operation completes.
+ *
+ * @par Example
+ * To send a single data buffer use the @ref buffer function as follows:
+ * @code
+ * socket.async_send(asio::buffer(data, size), handler);
+ * @endcode
+ * See the @ref buffer documentation for information on sending multiple
+ * buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename ConstBufferSequence, typename WriteHandler>
+ ASIO_INITFN_RESULT_TYPE(WriteHandler,
+ void (asio::error_code, std::size_t))
+ async_send(const ConstBufferSequence& buffers,
+ ASIO_MOVE_ARG(WriteHandler) handler)
+ {
+ // If you get an error on the following line it means that your handler does
+ // not meet the documented type requirements for a WriteHandler.
+ ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;
+
+ return this->get_service().async_send(
+ this->get_implementation(), buffers, 0,
+ ASIO_MOVE_CAST(WriteHandler)(handler));
+ }
+
+ /// Start an asynchronous send.
+ /**
+ * This function is used to asynchronously send data on the stream socket.
+ * The function call always returns immediately.
+ *
+ * @param buffers One or more data buffers to be sent on the socket. Although
+ * the buffers object may be copied as necessary, ownership of the underlying
+ * memory blocks is retained by the caller, which must guarantee that they
+ * remain valid until the handler is called.
+ *
+ * @param flags Flags specifying how the send call is to be made.
+ *
+ * @param handler The handler to be called when the send operation completes.
+ * Copies will be made of the handler as required. The function signature of
+ * the handler must be:
+ * @code void handler(
+ * const asio::error_code& error, // Result of operation.
+ * std::size_t bytes_transferred // Number of bytes sent.
+ * ); @endcode
+ * Regardless of whether the asynchronous operation completes immediately or
+ * not, the handler will not be invoked from within this function. Invocation
+ * of the handler will be performed in a manner equivalent to using
+ * asio::io_service::post().
+ *
+ * @note The send operation may not transmit all of the data to the peer.
+ * Consider using the @ref async_write function if you need to ensure that all
+ * data is written before the asynchronous operation completes.
+ *
+ * @par Example
+ * To send a single data buffer use the @ref buffer function as follows:
+ * @code
+ * socket.async_send(asio::buffer(data, size), 0, handler);
+ * @endcode
+ * See the @ref buffer documentation for information on sending multiple
+ * buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename ConstBufferSequence, typename WriteHandler>
+ ASIO_INITFN_RESULT_TYPE(WriteHandler,
+ void (asio::error_code, std::size_t))
+ async_send(const ConstBufferSequence& buffers,
+ socket_base::message_flags flags,
+ ASIO_MOVE_ARG(WriteHandler) handler)
+ {
+ // If you get an error on the following line it means that your handler does
+ // not meet the documented type requirements for a WriteHandler.
+ ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;
+
+ return this->get_service().async_send(
+ this->get_implementation(), buffers, flags,
+ ASIO_MOVE_CAST(WriteHandler)(handler));
+ }
+
+ /// Receive some data on the socket.
+ /**
+ * This function is used to receive data on the stream socket. The function
+ * call will block until one or more bytes of data has been received
+ * successfully, or until an error occurs.
+ *
+ * @param buffers One or more buffers into which the data will be received.
+ *
+ * @returns The number of bytes received.
+ *
+ * @throws asio::system_error Thrown on failure. An error code of
+ * asio::error::eof indicates that the connection was closed by the
+ * peer.
+ *
+ * @note The receive operation may not receive all of the requested number of
+ * bytes. Consider using the @ref read function if you need to ensure that the
+ * requested amount of data is read before the blocking operation completes.
+ *
+ * @par Example
+ * To receive into a single data buffer use the @ref buffer function as
+ * follows:
+ * @code
+ * socket.receive(asio::buffer(data, size));
+ * @endcode
+ * See the @ref buffer documentation for information on receiving into
+ * multiple buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename MutableBufferSequence>
+ std::size_t receive(const MutableBufferSequence& buffers)
+ {
+ asio::error_code ec;
+ std::size_t s = this->get_service().receive(
+ this->get_implementation(), buffers, 0, ec);
+ asio::detail::throw_error(ec, "receive");
+ return s;
+ }
+
+ /// Receive some data on the socket.
+ /**
+ * This function is used to receive data on the stream socket. The function
+ * call will block until one or more bytes of data has been received
+ * successfully, or until an error occurs.
+ *
+ * @param buffers One or more buffers into which the data will be received.
+ *
+ * @param flags Flags specifying how the receive call is to be made.
+ *
+ * @returns The number of bytes received.
+ *
+ * @throws asio::system_error Thrown on failure. An error code of
+ * asio::error::eof indicates that the connection was closed by the
+ * peer.
+ *
+ * @note The receive operation may not receive all of the requested number of
+ * bytes. Consider using the @ref read function if you need to ensure that the
+ * requested amount of data is read before the blocking operation completes.
+ *
+ * @par Example
+ * To receive into a single data buffer use the @ref buffer function as
+ * follows:
+ * @code
+ * socket.receive(asio::buffer(data, size), 0);
+ * @endcode
+ * See the @ref buffer documentation for information on receiving into
+ * multiple buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename MutableBufferSequence>
+ std::size_t receive(const MutableBufferSequence& buffers,
+ socket_base::message_flags flags)
+ {
+ asio::error_code ec;
+ std::size_t s = this->get_service().receive(
+ this->get_implementation(), buffers, flags, ec);
+ asio::detail::throw_error(ec, "receive");
+ return s;
+ }
+
+ /// Receive some data on a connected socket.
+ /**
+ * This function is used to receive data on the stream socket. The function
+ * call will block until one or more bytes of data has been received
+ * successfully, or until an error occurs.
+ *
+ * @param buffers One or more buffers into which the data will be received.
+ *
+ * @param flags Flags specifying how the receive call is to be made.
+ *
+ * @param ec Set to indicate what error occurred, if any.
+ *
+ * @returns The number of bytes received. Returns 0 if an error occurred.
+ *
+ * @note The receive operation may not receive all of the requested number of
+ * bytes. Consider using the @ref read function if you need to ensure that the
+ * requested amount of data is read before the blocking operation completes.
+ */
+ template <typename MutableBufferSequence>
+ std::size_t receive(const MutableBufferSequence& buffers,
+ socket_base::message_flags flags, asio::error_code& ec)
+ {
+ return this->get_service().receive(
+ this->get_implementation(), buffers, flags, ec);
+ }
+
+ /// Start an asynchronous receive.
+ /**
+ * This function is used to asynchronously receive data from the stream
+ * socket. The function call always returns immediately.
+ *
+ * @param buffers One or more buffers into which the data will be received.
+ * Although the buffers object may be copied as necessary, ownership of the
+ * underlying memory blocks is retained by the caller, which must guarantee
+ * that they remain valid until the handler is called.
+ *
+ * @param handler The handler to be called when the receive operation
+ * completes. Copies will be made of the handler as required. The function
+ * signature of the handler must be:
+ * @code void handler(
+ * const asio::error_code& error, // Result of operation.
+ * std::size_t bytes_transferred // Number of bytes received.
+ * ); @endcode
+ * Regardless of whether the asynchronous operation completes immediately or
+ * not, the handler will not be invoked from within this function. Invocation
+ * of the handler will be performed in a manner equivalent to using
+ * asio::io_service::post().
+ *
+ * @note The receive operation may not receive all of the requested number of
+ * bytes. Consider using the @ref async_read function if you need to ensure
+ * that the requested amount of data is received before the asynchronous
+ * operation completes.
+ *
+ * @par Example
+ * To receive into a single data buffer use the @ref buffer function as
+ * follows:
+ * @code
+ * socket.async_receive(asio::buffer(data, size), handler);
+ * @endcode
+ * See the @ref buffer documentation for information on receiving into
+ * multiple buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename MutableBufferSequence, typename ReadHandler>
+ ASIO_INITFN_RESULT_TYPE(ReadHandler,
+ void (asio::error_code, std::size_t))
+ async_receive(const MutableBufferSequence& buffers,
+ ASIO_MOVE_ARG(ReadHandler) handler)
+ {
+ // If you get an error on the following line it means that your handler does
+ // not meet the documented type requirements for a ReadHandler.
+ ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
+
+ return this->get_service().async_receive(this->get_implementation(),
+ buffers, 0, ASIO_MOVE_CAST(ReadHandler)(handler));
+ }
+
+ /// Start an asynchronous receive.
+ /**
+ * This function is used to asynchronously receive data from the stream
+ * socket. The function call always returns immediately.
+ *
+ * @param buffers One or more buffers into which the data will be received.
+ * Although the buffers object may be copied as necessary, ownership of the
+ * underlying memory blocks is retained by the caller, which must guarantee
+ * that they remain valid until the handler is called.
+ *
+ * @param flags Flags specifying how the receive call is to be made.
+ *
+ * @param handler The handler to be called when the receive operation
+ * completes. Copies will be made of the handler as required. The function
+ * signature of the handler must be:
+ * @code void handler(
+ * const asio::error_code& error, // Result of operation.
+ * std::size_t bytes_transferred // Number of bytes received.
+ * ); @endcode
+ * Regardless of whether the asynchronous operation completes immediately or
+ * not, the handler will not be invoked from within this function. Invocation
+ * of the handler will be performed in a manner equivalent to using
+ * asio::io_service::post().
+ *
+ * @note The receive operation may not receive all of the requested number of
+ * bytes. Consider using the @ref async_read function if you need to ensure
+ * that the requested amount of data is received before the asynchronous
+ * operation completes.
+ *
+ * @par Example
+ * To receive into a single data buffer use the @ref buffer function as
+ * follows:
+ * @code
+ * socket.async_receive(asio::buffer(data, size), 0, handler);
+ * @endcode
+ * See the @ref buffer documentation for information on receiving into
+ * multiple buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename MutableBufferSequence, typename ReadHandler>
+ ASIO_INITFN_RESULT_TYPE(ReadHandler,
+ void (asio::error_code, std::size_t))
+ async_receive(const MutableBufferSequence& buffers,
+ socket_base::message_flags flags,
+ ASIO_MOVE_ARG(ReadHandler) handler)
+ {
+ // If you get an error on the following line it means that your handler does
+ // not meet the documented type requirements for a ReadHandler.
+ ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
+
+ return this->get_service().async_receive(this->get_implementation(),
+ buffers, flags, ASIO_MOVE_CAST(ReadHandler)(handler));
+ }
+
+ /// Write some data to the socket.
+ /**
+ * This function is used to write data to the stream socket. The function call
+ * will block until one or more bytes of the data has been written
+ * successfully, or until an error occurs.
+ *
+ * @param buffers One or more data buffers to be written to the socket.
+ *
+ * @returns The number of bytes written.
+ *
+ * @throws asio::system_error Thrown on failure. An error code of
+ * asio::error::eof indicates that the connection was closed by the
+ * peer.
+ *
+ * @note The write_some operation may not transmit all of the data to the
+ * peer. Consider using the @ref write function if you need to ensure that
+ * all data is written before the blocking operation completes.
+ *
+ * @par Example
+ * To write a single data buffer use the @ref buffer function as follows:
+ * @code
+ * socket.write_some(asio::buffer(data, size));
+ * @endcode
+ * See the @ref buffer documentation for information on writing multiple
+ * buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename ConstBufferSequence>
+ std::size_t write_some(const ConstBufferSequence& buffers)
+ {
+ asio::error_code ec;
+ std::size_t s = this->get_service().send(
+ this->get_implementation(), buffers, 0, ec);
+ asio::detail::throw_error(ec, "write_some");
+ return s;
+ }
+
+ /// Write some data to the socket.
+ /**
+ * This function is used to write data to the stream socket. The function call
+ * will block until one or more bytes of the data has been written
+ * successfully, or until an error occurs.
+ *
+ * @param buffers One or more data buffers to be written to the socket.
+ *
+ * @param ec Set to indicate what error occurred, if any.
+ *
+ * @returns The number of bytes written. Returns 0 if an error occurred.
+ *
+ * @note The write_some operation may not transmit all of the data to the
+ * peer. Consider using the @ref write function if you need to ensure that
+ * all data is written before the blocking operation completes.
+ */
+ template <typename ConstBufferSequence>
+ std::size_t write_some(const ConstBufferSequence& buffers,
+ asio::error_code& ec)
+ {
+ return this->get_service().send(this->get_implementation(), buffers, 0, ec);
+ }
+
+ /// Start an asynchronous write.
+ /**
+ * This function is used to asynchronously write data to the stream socket.
+ * The function call always returns immediately.
+ *
+ * @param buffers One or more data buffers to be written to the socket.
+ * Although the buffers object may be copied as necessary, ownership of the
+ * underlying memory blocks is retained by the caller, which must guarantee
+ * that they remain valid until the handler is called.
+ *
+ * @param handler The handler to be called when the write operation completes.
+ * Copies will be made of the handler as required. The function signature of
+ * the handler must be:
+ * @code void handler(
+ * const asio::error_code& error, // Result of operation.
+ * std::size_t bytes_transferred // Number of bytes written.
+ * ); @endcode
+ * Regardless of whether the asynchronous operation completes immediately or
+ * not, the handler will not be invoked from within this function. Invocation
+ * of the handler will be performed in a manner equivalent to using
+ * asio::io_service::post().
+ *
+ * @note The write operation may not transmit all of the data to the peer.
+ * Consider using the @ref async_write function if you need to ensure that all
+ * data is written before the asynchronous operation completes.
+ *
+ * @par Example
+ * To write a single data buffer use the @ref buffer function as follows:
+ * @code
+ * socket.async_write_some(asio::buffer(data, size), handler);
+ * @endcode
+ * See the @ref buffer documentation for information on writing multiple
+ * buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename ConstBufferSequence, typename WriteHandler>
+ ASIO_INITFN_RESULT_TYPE(WriteHandler,
+ void (asio::error_code, std::size_t))
+ async_write_some(const ConstBufferSequence& buffers,
+ ASIO_MOVE_ARG(WriteHandler) handler)
+ {
+ // If you get an error on the following line it means that your handler does
+ // not meet the documented type requirements for a WriteHandler.
+ ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;
+
+ return this->get_service().async_send(this->get_implementation(),
+ buffers, 0, ASIO_MOVE_CAST(WriteHandler)(handler));
+ }
+
+ /// Read some data from the socket.
+ /**
+ * This function is used to read data from the stream socket. The function
+ * call will block until one or more bytes of data has been read successfully,
+ * or until an error occurs.
+ *
+ * @param buffers One or more buffers into which the data will be read.
+ *
+ * @returns The number of bytes read.
+ *
+ * @throws asio::system_error Thrown on failure. An error code of
+ * asio::error::eof indicates that the connection was closed by the
+ * peer.
+ *
+ * @note The read_some operation may not read all of the requested number of
+ * bytes. Consider using the @ref read function if you need to ensure that
+ * the requested amount of data is read before the blocking operation
+ * completes.
+ *
+ * @par Example
+ * To read into a single data buffer use the @ref buffer function as follows:
+ * @code
+ * socket.read_some(asio::buffer(data, size));
+ * @endcode
+ * See the @ref buffer documentation for information on reading into multiple
+ * buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename MutableBufferSequence>
+ std::size_t read_some(const MutableBufferSequence& buffers)
+ {
+ asio::error_code ec;
+ std::size_t s = this->get_service().receive(
+ this->get_implementation(), buffers, 0, ec);
+ asio::detail::throw_error(ec, "read_some");
+ return s;
+ }
+
+ /// Read some data from the socket.
+ /**
+ * This function is used to read data from the stream socket. The function
+ * call will block until one or more bytes of data has been read successfully,
+ * or until an error occurs.
+ *
+ * @param buffers One or more buffers into which the data will be read.
+ *
+ * @param ec Set to indicate what error occurred, if any.
+ *
+ * @returns The number of bytes read. Returns 0 if an error occurred.
+ *
+ * @note The read_some operation may not read all of the requested number of
+ * bytes. Consider using the @ref read function if you need to ensure that
+ * the requested amount of data is read before the blocking operation
+ * completes.
+ */
+ template <typename MutableBufferSequence>
+ std::size_t read_some(const MutableBufferSequence& buffers,
+ asio::error_code& ec)
+ {
+ return this->get_service().receive(
+ this->get_implementation(), buffers, 0, ec);
+ }
+
+ /// Start an asynchronous read.
+ /**
+ * This function is used to asynchronously read data from the stream socket.
+ * The function call always returns immediately.
+ *
+ * @param buffers One or more buffers into which the data will be read.
+ * Although the buffers object may be copied as necessary, ownership of the
+ * underlying memory blocks is retained by the caller, which must guarantee
+ * that they remain valid until the handler is called.
+ *
+ * @param handler The handler to be called when the read operation completes.
+ * Copies will be made of the handler as required. The function signature of
+ * the handler must be:
+ * @code void handler(
+ * const asio::error_code& error, // Result of operation.
+ * std::size_t bytes_transferred // Number of bytes read.
+ * ); @endcode
+ * Regardless of whether the asynchronous operation completes immediately or
+ * not, the handler will not be invoked from within this function. Invocation
+ * of the handler will be performed in a manner equivalent to using
+ * asio::io_service::post().
+ *
+ * @note The read operation may not read all of the requested number of bytes.
+ * Consider using the @ref async_read function if you need to ensure that the
+ * requested amount of data is read before the asynchronous operation
+ * completes.
+ *
+ * @par Example
+ * To read into a single data buffer use the @ref buffer function as follows:
+ * @code
+ * socket.async_read_some(asio::buffer(data, size), handler);
+ * @endcode
+ * See the @ref buffer documentation for information on reading into multiple
+ * buffers in one go, and how to use it with arrays, boost::array or
+ * std::vector.
+ */
+ template <typename MutableBufferSequence, typename ReadHandler>
+ ASIO_INITFN_RESULT_TYPE(ReadHandler,
+ void (asio::error_code, std::size_t))
+ async_read_some(const MutableBufferSequence& buffers,
+ ASIO_MOVE_ARG(ReadHandler) handler)
+ {
+ // If you get an error on the following line it means that your handler does
+ // not meet the documented type requirements for a ReadHandler.
+ ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
+
+ return this->get_service().async_receive(this->get_implementation(),
+ buffers, 0, ASIO_MOVE_CAST(ReadHandler)(handler));
+ }
+};
+
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_BASIC_STREAM_SOCKET_HPP
http://git-wip-us.apache.org/repos/asf/hadoop/blob/5b1aba70/hadoop-hdfs-project/hadoop-hdfs-client/src/main/native/libhdfspp/third_party/asio-1.10.2/include/asio/basic_streambuf.hpp
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+//
+// basic_streambuf.hpp
+// ~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef ASIO_BASIC_STREAMBUF_HPP
+#define ASIO_BASIC_STREAMBUF_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+
+#if !defined(ASIO_NO_IOSTREAM)
+
+#include <algorithm>
+#include <cstring>
+#include <stdexcept>
+#include <streambuf>
+#include <vector>
+#include "asio/basic_streambuf_fwd.hpp"
+#include "asio/buffer.hpp"
+#include "asio/detail/limits.hpp"
+#include "asio/detail/noncopyable.hpp"
+#include "asio/detail/throw_exception.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+
+/// Automatically resizable buffer class based on std::streambuf.
+/**
+ * The @c basic_streambuf class is derived from @c std::streambuf to associate
+ * the streambuf's input and output sequences with one or more character
+ * arrays. These character arrays are internal to the @c basic_streambuf
+ * object, but direct access to the array elements is provided to permit them
+ * to be used efficiently with I/O operations. Characters written to the output
+ * sequence of a @c basic_streambuf object are appended to the input sequence
+ * of the same object.
+ *
+ * The @c basic_streambuf class's public interface is intended to permit the
+ * following implementation strategies:
+ *
+ * @li A single contiguous character array, which is reallocated as necessary
+ * to accommodate changes in the size of the character sequence. This is the
+ * implementation approach currently used in Asio.
+ *
+ * @li A sequence of one or more character arrays, where each array is of the
+ * same size. Additional character array objects are appended to the sequence
+ * to accommodate changes in the size of the character sequence.
+ *
+ * @li A sequence of one or more character arrays of varying sizes. Additional
+ * character array objects are appended to the sequence to accommodate changes
+ * in the size of the character sequence.
+ *
+ * The constructor for basic_streambuf accepts a @c size_t argument specifying
+ * the maximum of the sum of the sizes of the input sequence and output
+ * sequence. During the lifetime of the @c basic_streambuf object, the following
+ * invariant holds:
+ * @code size() <= max_size()@endcode
+ * Any member function that would, if successful, cause the invariant to be
+ * violated shall throw an exception of class @c std::length_error.
+ *
+ * The constructor for @c basic_streambuf takes an Allocator argument. A copy
+ * of this argument is used for any memory allocation performed, by the
+ * constructor and by all member functions, during the lifetime of each @c
+ * basic_streambuf object.
+ *
+ * @par Examples
+ * Writing directly from an streambuf to a socket:
+ * @code
+ * asio::streambuf b;
+ * std::ostream os(&b);
+ * os << "Hello, World!\n";
+ *
+ * // try sending some data in input sequence
+ * size_t n = sock.send(b.data());
+ *
+ * b.consume(n); // sent data is removed from input sequence
+ * @endcode
+ *
+ * Reading from a socket directly into a streambuf:
+ * @code
+ * asio::streambuf b;
+ *
+ * // reserve 512 bytes in output sequence
+ * asio::streambuf::mutable_buffers_type bufs = b.prepare(512);
+ *
+ * size_t n = sock.receive(bufs);
+ *
+ * // received data is "committed" from output sequence to input sequence
+ * b.commit(n);
+ *
+ * std::istream is(&b);
+ * std::string s;
+ * is >> s;
+ * @endcode
+ */
+#if defined(GENERATING_DOCUMENTATION)
+template <typename Allocator = std::allocator<char> >
+#else
+template <typename Allocator>
+#endif
+class basic_streambuf
+ : public std::streambuf,
+ private noncopyable
+{
+public:
+#if defined(GENERATING_DOCUMENTATION)
+ /// The type used to represent the input sequence as a list of buffers.
+ typedef implementation_defined const_buffers_type;
+
+ /// The type used to represent the output sequence as a list of buffers.
+ typedef implementation_defined mutable_buffers_type;
+#else
+ typedef asio::const_buffers_1 const_buffers_type;
+ typedef asio::mutable_buffers_1 mutable_buffers_type;
+#endif
+
+ /// Construct a basic_streambuf object.
+ /**
+ * Constructs a streambuf with the specified maximum size. The initial size
+ * of the streambuf's input sequence is 0.
+ */
+ explicit basic_streambuf(
+ std::size_t maximum_size = (std::numeric_limits<std::size_t>::max)(),
+ const Allocator& allocator = Allocator())
+ : max_size_(maximum_size),
+ buffer_(allocator)
+ {
+ std::size_t pend = (std::min<std::size_t>)(max_size_, buffer_delta);
+ buffer_.resize((std::max<std::size_t>)(pend, 1));
+ setg(&buffer_[0], &buffer_[0], &buffer_[0]);
+ setp(&buffer_[0], &buffer_[0] + pend);
+ }
+
+ /// Get the size of the input sequence.
+ /**
+ * @returns The size of the input sequence. The value is equal to that
+ * calculated for @c s in the following code:
+ * @code
+ * size_t s = 0;
+ * const_buffers_type bufs = data();
+ * const_buffers_type::const_iterator i = bufs.begin();
+ * while (i != bufs.end())
+ * {
+ * const_buffer buf(*i++);
+ * s += buffer_size(buf);
+ * }
+ * @endcode
+ */
+ std::size_t size() const
+ {
+ return pptr() - gptr();
+ }
+
+ /// Get the maximum size of the basic_streambuf.
+ /**
+ * @returns The allowed maximum of the sum of the sizes of the input sequence
+ * and output sequence.
+ */
+ std::size_t max_size() const
+ {
+ return max_size_;
+ }
+
+ /// Get a list of buffers that represents the input sequence.
+ /**
+ * @returns An object of type @c const_buffers_type that satisfies
+ * ConstBufferSequence requirements, representing all character arrays in the
+ * input sequence.
+ *
+ * @note The returned object is invalidated by any @c basic_streambuf member
+ * function that modifies the input sequence or output sequence.
+ */
+ const_buffers_type data() const
+ {
+ return asio::buffer(asio::const_buffer(gptr(),
+ (pptr() - gptr()) * sizeof(char_type)));
+ }
+
+ /// Get a list of buffers that represents the output sequence, with the given
+ /// size.
+ /**
+ * Ensures that the output sequence can accommodate @c n characters,
+ * reallocating character array objects as necessary.
+ *
+ * @returns An object of type @c mutable_buffers_type that satisfies
+ * MutableBufferSequence requirements, representing character array objects
+ * at the start of the output sequence such that the sum of the buffer sizes
+ * is @c n.
+ *
+ * @throws std::length_error If <tt>size() + n > max_size()</tt>.
+ *
+ * @note The returned object is invalidated by any @c basic_streambuf member
+ * function that modifies the input sequence or output sequence.
+ */
+ mutable_buffers_type prepare(std::size_t n)
+ {
+ reserve(n);
+ return asio::buffer(asio::mutable_buffer(
+ pptr(), n * sizeof(char_type)));
+ }
+
+ /// Move characters from the output sequence to the input sequence.
+ /**
+ * Appends @c n characters from the start of the output sequence to the input
+ * sequence. The beginning of the output sequence is advanced by @c n
+ * characters.
+ *
+ * Requires a preceding call <tt>prepare(x)</tt> where <tt>x >= n</tt>, and
+ * no intervening operations that modify the input or output sequence.
+ *
+ * @note If @c n is greater than the size of the output sequence, the entire
+ * output sequence is moved to the input sequence and no error is issued.
+ */
+ void commit(std::size_t n)
+ {
+ if (pptr() + n > epptr())
+ n = epptr() - pptr();
+ pbump(static_cast<int>(n));
+ setg(eback(), gptr(), pptr());
+ }
+
+ /// Remove characters from the input sequence.
+ /**
+ * Removes @c n characters from the beginning of the input sequence.
+ *
+ * @note If @c n is greater than the size of the input sequence, the entire
+ * input sequence is consumed and no error is issued.
+ */
+ void consume(std::size_t n)
+ {
+ if (egptr() < pptr())
+ setg(&buffer_[0], gptr(), pptr());
+ if (gptr() + n > pptr())
+ n = pptr() - gptr();
+ gbump(static_cast<int>(n));
+ }
+
+protected:
+ enum { buffer_delta = 128 };
+
+ /// Override std::streambuf behaviour.
+ /**
+ * Behaves according to the specification of @c std::streambuf::underflow().
+ */
+ int_type underflow()
+ {
+ if (gptr() < pptr())
+ {
+ setg(&buffer_[0], gptr(), pptr());
+ return traits_type::to_int_type(*gptr());
+ }
+ else
+ {
+ return traits_type::eof();
+ }
+ }
+
+ /// Override std::streambuf behaviour.
+ /**
+ * Behaves according to the specification of @c std::streambuf::overflow(),
+ * with the specialisation that @c std::length_error is thrown if appending
+ * the character to the input sequence would require the condition
+ * <tt>size() > max_size()</tt> to be true.
+ */
+ int_type overflow(int_type c)
+ {
+ if (!traits_type::eq_int_type(c, traits_type::eof()))
+ {
+ if (pptr() == epptr())
+ {
+ std::size_t buffer_size = pptr() - gptr();
+ if (buffer_size < max_size_ && max_size_ - buffer_size < buffer_delta)
+ {
+ reserve(max_size_ - buffer_size);
+ }
+ else
+ {
+ reserve(buffer_delta);
+ }
+ }
+
+ *pptr() = traits_type::to_char_type(c);
+ pbump(1);
+ return c;
+ }
+
+ return traits_type::not_eof(c);
+ }
+
+ void reserve(std::size_t n)
+ {
+ // Get current stream positions as offsets.
+ std::size_t gnext = gptr() - &buffer_[0];
+ std::size_t pnext = pptr() - &buffer_[0];
+ std::size_t pend = epptr() - &buffer_[0];
+
+ // Check if there is already enough space in the put area.
+ if (n <= pend - pnext)
+ {
+ return;
+ }
+
+ // Shift existing contents of get area to start of buffer.
+ if (gnext > 0)
+ {
+ pnext -= gnext;
+ std::memmove(&buffer_[0], &buffer_[0] + gnext, pnext);
+ }
+
+ // Ensure buffer is large enough to hold at least the specified size.
+ if (n > pend - pnext)
+ {
+ if (n <= max_size_ && pnext <= max_size_ - n)
+ {
+ pend = pnext + n;
+ buffer_.resize((std::max<std::size_t>)(pend, 1));
+ }
+ else
+ {
+ std::length_error ex("asio::streambuf too long");
+ asio::detail::throw_exception(ex);
+ }
+ }
+
+ // Update stream positions.
+ setg(&buffer_[0], &buffer_[0], &buffer_[0] + pnext);
+ setp(&buffer_[0] + pnext, &buffer_[0] + pend);
+ }
+
+private:
+ std::size_t max_size_;
+ std::vector<char_type, Allocator> buffer_;
+
+ // Helper function to get the preferred size for reading data.
+ friend std::size_t read_size_helper(
+ basic_streambuf& sb, std::size_t max_size)
+ {
+ return std::min<std::size_t>(
+ std::max<std::size_t>(512, sb.buffer_.capacity() - sb.size()),
+ std::min<std::size_t>(max_size, sb.max_size() - sb.size()));
+ }
+};
+
+// Helper function to get the preferred size for reading data. Used for any
+// user-provided specialisations of basic_streambuf.
+template <typename Allocator>
+inline std::size_t read_size_helper(
+ basic_streambuf<Allocator>& sb, std::size_t max_size)
+{
+ return std::min<std::size_t>(512,
+ std::min<std::size_t>(max_size, sb.max_size() - sb.size()));
+}
+
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // !defined(ASIO_NO_IOSTREAM)
+
+#endif // ASIO_BASIC_STREAMBUF_HPP
http://git-wip-us.apache.org/repos/asf/hadoop/blob/5b1aba70/hadoop-hdfs-project/hadoop-hdfs-client/src/main/native/libhdfspp/third_party/asio-1.10.2/include/asio/basic_streambuf_fwd.hpp
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diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/native/libhdfspp/third_party/asio-1.10.2/include/asio/basic_streambuf_fwd.hpp b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/native/libhdfspp/third_party/asio-1.10.2/include/asio/basic_streambuf_fwd.hpp
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+//
+// basic_streambuf_fwd.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef ASIO_BASIC_STREAMBUF_FWD_HPP
+#define ASIO_BASIC_STREAMBUF_FWD_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+
+#if !defined(ASIO_NO_IOSTREAM)
+
+#include <memory>
+
+namespace asio {
+
+template <typename Allocator = std::allocator<char> >
+class basic_streambuf;
+
+} // namespace asio
+
+#endif // !defined(ASIO_NO_IOSTREAM)
+
+#endif // ASIO_BASIC_STREAMBUF_FWD_HPP
http://git-wip-us.apache.org/repos/asf/hadoop/blob/5b1aba70/hadoop-hdfs-project/hadoop-hdfs-client/src/main/native/libhdfspp/third_party/asio-1.10.2/include/asio/basic_waitable_timer.hpp
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diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/native/libhdfspp/third_party/asio-1.10.2/include/asio/basic_waitable_timer.hpp b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/native/libhdfspp/third_party/asio-1.10.2/include/asio/basic_waitable_timer.hpp
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+//
+// basic_waitable_timer.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef ASIO_BASIC_WAITABLE_TIMER_HPP
+#define ASIO_BASIC_WAITABLE_TIMER_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+#include <cstddef>
+#include "asio/basic_io_object.hpp"
+#include "asio/detail/handler_type_requirements.hpp"
+#include "asio/detail/throw_error.hpp"
+#include "asio/error.hpp"
+#include "asio/wait_traits.hpp"
+#include "asio/waitable_timer_service.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+
+/// Provides waitable timer functionality.
+/**
+ * The basic_waitable_timer class template provides the ability to perform a
+ * blocking or asynchronous wait for a timer to expire.
+ *
+ * A waitable timer is always in one of two states: "expired" or "not expired".
+ * If the wait() or async_wait() function is called on an expired timer, the
+ * wait operation will complete immediately.
+ *
+ * Most applications will use one of the asio::steady_timer,
+ * asio::system_timer or asio::high_resolution_timer typedefs.
+ *
+ * @note This waitable timer functionality is for use with the C++11 standard
+ * library's @c <chrono> facility, or with the Boost.Chrono library.
+ *
+ * @par Thread Safety
+ * @e Distinct @e objects: Safe.@n
+ * @e Shared @e objects: Unsafe.
+ *
+ * @par Examples
+ * Performing a blocking wait (C++11):
+ * @code
+ * // Construct a timer without setting an expiry time.
+ * asio::steady_timer timer(io_service);
+ *
+ * // Set an expiry time relative to now.
+ * timer.expires_from_now(std::chrono::seconds(5));
+ *
+ * // Wait for the timer to expire.
+ * timer.wait();
+ * @endcode
+ *
+ * @par
+ * Performing an asynchronous wait (C++11):
+ * @code
+ * void handler(const asio::error_code& error)
+ * {
+ * if (!error)
+ * {
+ * // Timer expired.
+ * }
+ * }
+ *
+ * ...
+ *
+ * // Construct a timer with an absolute expiry time.
+ * asio::steady_timer timer(io_service,
+ * std::chrono::steady_clock::now() + std::chrono::seconds(60));
+ *
+ * // Start an asynchronous wait.
+ * timer.async_wait(handler);
+ * @endcode
+ *
+ * @par Changing an active waitable timer's expiry time
+ *
+ * Changing the expiry time of a timer while there are pending asynchronous
+ * waits causes those wait operations to be cancelled. To ensure that the action
+ * associated with the timer is performed only once, use something like this:
+ * used:
+ *
+ * @code
+ * void on_some_event()
+ * {
+ * if (my_timer.expires_from_now(seconds(5)) > 0)
+ * {
+ * // We managed to cancel the timer. Start new asynchronous wait.
+ * my_timer.async_wait(on_timeout);
+ * }
+ * else
+ * {
+ * // Too late, timer has already expired!
+ * }
+ * }
+ *
+ * void on_timeout(const asio::error_code& e)
+ * {
+ * if (e != asio::error::operation_aborted)
+ * {
+ * // Timer was not cancelled, take necessary action.
+ * }
+ * }
+ * @endcode
+ *
+ * @li The asio::basic_waitable_timer::expires_from_now() function
+ * cancels any pending asynchronous waits, and returns the number of
+ * asynchronous waits that were cancelled. If it returns 0 then you were too
+ * late and the wait handler has already been executed, or will soon be
+ * executed. If it returns 1 then the wait handler was successfully cancelled.
+ *
+ * @li If a wait handler is cancelled, the asio::error_code passed to
+ * it contains the value asio::error::operation_aborted.
+ */
+template <typename Clock,
+ typename WaitTraits = asio::wait_traits<Clock>,
+ typename WaitableTimerService = waitable_timer_service<Clock, WaitTraits> >
+class basic_waitable_timer
+ : public basic_io_object<WaitableTimerService>
+{
+public:
+ /// The clock type.
+ typedef Clock clock_type;
+
+ /// The duration type of the clock.
+ typedef typename clock_type::duration duration;
+
+ /// The time point type of the clock.
+ typedef typename clock_type::time_point time_point;
+
+ /// The wait traits type.
+ typedef WaitTraits traits_type;
+
+ /// Constructor.
+ /**
+ * This constructor creates a timer without setting an expiry time. The
+ * expires_at() or expires_from_now() functions must be called to set an
+ * expiry time before the timer can be waited on.
+ *
+ * @param io_service The io_service object that the timer will use to dispatch
+ * handlers for any asynchronous operations performed on the timer.
+ */
+ explicit basic_waitable_timer(asio::io_service& io_service)
+ : basic_io_object<WaitableTimerService>(io_service)
+ {
+ }
+
+ /// Constructor to set a particular expiry time as an absolute time.
+ /**
+ * This constructor creates a timer and sets the expiry time.
+ *
+ * @param io_service The io_service object that the timer will use to dispatch
+ * handlers for any asynchronous operations performed on the timer.
+ *
+ * @param expiry_time The expiry time to be used for the timer, expressed
+ * as an absolute time.
+ */
+ basic_waitable_timer(asio::io_service& io_service,
+ const time_point& expiry_time)
+ : basic_io_object<WaitableTimerService>(io_service)
+ {
+ asio::error_code ec;
+ this->service.expires_at(this->implementation, expiry_time, ec);
+ asio::detail::throw_error(ec, "expires_at");
+ }
+
+ /// Constructor to set a particular expiry time relative to now.
+ /**
+ * This constructor creates a timer and sets the expiry time.
+ *
+ * @param io_service The io_service object that the timer will use to dispatch
+ * handlers for any asynchronous operations performed on the timer.
+ *
+ * @param expiry_time The expiry time to be used for the timer, relative to
+ * now.
+ */
+ basic_waitable_timer(asio::io_service& io_service,
+ const duration& expiry_time)
+ : basic_io_object<WaitableTimerService>(io_service)
+ {
+ asio::error_code ec;
+ this->service.expires_from_now(this->implementation, expiry_time, ec);
+ asio::detail::throw_error(ec, "expires_from_now");
+ }
+
+ /// Cancel any asynchronous operations that are waiting on the timer.
+ /**
+ * This function forces the completion of any pending asynchronous wait
+ * operations against the timer. The handler for each cancelled operation will
+ * be invoked with the asio::error::operation_aborted error code.
+ *
+ * Cancelling the timer does not change the expiry time.
+ *
+ * @return The number of asynchronous operations that were cancelled.
+ *
+ * @throws asio::system_error Thrown on failure.
+ *
+ * @note If the timer has already expired when cancel() is called, then the
+ * handlers for asynchronous wait operations will:
+ *
+ * @li have already been invoked; or
+ *
+ * @li have been queued for invocation in the near future.
+ *
+ * These handlers can no longer be cancelled, and therefore are passed an
+ * error code that indicates the successful completion of the wait operation.
+ */
+ std::size_t cancel()
+ {
+ asio::error_code ec;
+ std::size_t s = this->service.cancel(this->implementation, ec);
+ asio::detail::throw_error(ec, "cancel");
+ return s;
+ }
+
+ /// Cancel any asynchronous operations that are waiting on the timer.
+ /**
+ * This function forces the completion of any pending asynchronous wait
+ * operations against the timer. The handler for each cancelled operation will
+ * be invoked with the asio::error::operation_aborted error code.
+ *
+ * Cancelling the timer does not change the expiry time.
+ *
+ * @param ec Set to indicate what error occurred, if any.
+ *
+ * @return The number of asynchronous operations that were cancelled.
+ *
+ * @note If the timer has already expired when cancel() is called, then the
+ * handlers for asynchronous wait operations will:
+ *
+ * @li have already been invoked; or
+ *
+ * @li have been queued for invocation in the near future.
+ *
+ * These handlers can no longer be cancelled, and therefore are passed an
+ * error code that indicates the successful completion of the wait operation.
+ */
+ std::size_t cancel(asio::error_code& ec)
+ {
+ return this->service.cancel(this->implementation, ec);
+ }
+
+ /// Cancels one asynchronous operation that is waiting on the timer.
+ /**
+ * This function forces the completion of one pending asynchronous wait
+ * operation against the timer. Handlers are cancelled in FIFO order. The
+ * handler for the cancelled operation will be invoked with the
+ * asio::error::operation_aborted error code.
+ *
+ * Cancelling the timer does not change the expiry time.
+ *
+ * @return The number of asynchronous operations that were cancelled. That is,
+ * either 0 or 1.
+ *
+ * @throws asio::system_error Thrown on failure.
+ *
+ * @note If the timer has already expired when cancel_one() is called, then
+ * the handlers for asynchronous wait operations will:
+ *
+ * @li have already been invoked; or
+ *
+ * @li have been queued for invocation in the near future.
+ *
+ * These handlers can no longer be cancelled, and therefore are passed an
+ * error code that indicates the successful completion of the wait operation.
+ */
+ std::size_t cancel_one()
+ {
+ asio::error_code ec;
+ std::size_t s = this->service.cancel_one(this->implementation, ec);
+ asio::detail::throw_error(ec, "cancel_one");
+ return s;
+ }
+
+ /// Cancels one asynchronous operation that is waiting on the timer.
+ /**
+ * This function forces the completion of one pending asynchronous wait
+ * operation against the timer. Handlers are cancelled in FIFO order. The
+ * handler for the cancelled operation will be invoked with the
+ * asio::error::operation_aborted error code.
+ *
+ * Cancelling the timer does not change the expiry time.
+ *
+ * @param ec Set to indicate what error occurred, if any.
+ *
+ * @return The number of asynchronous operations that were cancelled. That is,
+ * either 0 or 1.
+ *
+ * @note If the timer has already expired when cancel_one() is called, then
+ * the handlers for asynchronous wait operations will:
+ *
+ * @li have already been invoked; or
+ *
+ * @li have been queued for invocation in the near future.
+ *
+ * These handlers can no longer be cancelled, and therefore are passed an
+ * error code that indicates the successful completion of the wait operation.
+ */
+ std::size_t cancel_one(asio::error_code& ec)
+ {
+ return this->service.cancel_one(this->implementation, ec);
+ }
+
+ /// Get the timer's expiry time as an absolute time.
+ /**
+ * This function may be used to obtain the timer's current expiry time.
+ * Whether the timer has expired or not does not affect this value.
+ */
+ time_point expires_at() const
+ {
+ return this->service.expires_at(this->implementation);
+ }
+
+ /// Set the timer's expiry time as an absolute time.
+ /**
+ * This function sets the expiry time. Any pending asynchronous wait
+ * operations will be cancelled. The handler for each cancelled operation will
+ * be invoked with the asio::error::operation_aborted error code.
+ *
+ * @param expiry_time The expiry time to be used for the timer.
+ *
+ * @return The number of asynchronous operations that were cancelled.
+ *
+ * @throws asio::system_error Thrown on failure.
+ *
+ * @note If the timer has already expired when expires_at() is called, then
+ * the handlers for asynchronous wait operations will:
+ *
+ * @li have already been invoked; or
+ *
+ * @li have been queued for invocation in the near future.
+ *
+ * These handlers can no longer be cancelled, and therefore are passed an
+ * error code that indicates the successful completion of the wait operation.
+ */
+ std::size_t expires_at(const time_point& expiry_time)
+ {
+ asio::error_code ec;
+ std::size_t s = this->service.expires_at(
+ this->implementation, expiry_time, ec);
+ asio::detail::throw_error(ec, "expires_at");
+ return s;
+ }
+
+ /// Set the timer's expiry time as an absolute time.
+ /**
+ * This function sets the expiry time. Any pending asynchronous wait
+ * operations will be cancelled. The handler for each cancelled operation will
+ * be invoked with the asio::error::operation_aborted error code.
+ *
+ * @param expiry_time The expiry time to be used for the timer.
+ *
+ * @param ec Set to indicate what error occurred, if any.
+ *
+ * @return The number of asynchronous operations that were cancelled.
+ *
+ * @note If the timer has already expired when expires_at() is called, then
+ * the handlers for asynchronous wait operations will:
+ *
+ * @li have already been invoked; or
+ *
+ * @li have been queued for invocation in the near future.
+ *
+ * These handlers can no longer be cancelled, and therefore are passed an
+ * error code that indicates the successful completion of the wait operation.
+ */
+ std::size_t expires_at(const time_point& expiry_time,
+ asio::error_code& ec)
+ {
+ return this->service.expires_at(this->implementation, expiry_time, ec);
+ }
+
+ /// Get the timer's expiry time relative to now.
+ /**
+ * This function may be used to obtain the timer's current expiry time.
+ * Whether the timer has expired or not does not affect this value.
+ */
+ duration expires_from_now() const
+ {
+ return this->service.expires_from_now(this->implementation);
+ }
+
+ /// Set the timer's expiry time relative to now.
+ /**
+ * This function sets the expiry time. Any pending asynchronous wait
+ * operations will be cancelled. The handler for each cancelled operation will
+ * be invoked with the asio::error::operation_aborted error code.
+ *
+ * @param expiry_time The expiry time to be used for the timer.
+ *
+ * @return The number of asynchronous operations that were cancelled.
+ *
+ * @throws asio::system_error Thrown on failure.
+ *
+ * @note If the timer has already expired when expires_from_now() is called,
+ * then the handlers for asynchronous wait operations will:
+ *
+ * @li have already been invoked; or
+ *
+ * @li have been queued for invocation in the near future.
+ *
+ * These handlers can no longer be cancelled, and therefore are passed an
+ * error code that indicates the successful completion of the wait operation.
+ */
+ std::size_t expires_from_now(const duration& expiry_time)
+ {
+ asio::error_code ec;
+ std::size_t s = this->service.expires_from_now(
+ this->implementation, expiry_time, ec);
+ asio::detail::throw_error(ec, "expires_from_now");
+ return s;
+ }
+
+ /// Set the timer's expiry time relative to now.
+ /**
+ * This function sets the expiry time. Any pending asynchronous wait
+ * operations will be cancelled. The handler for each cancelled operation will
+ * be invoked with the asio::error::operation_aborted error code.
+ *
+ * @param expiry_time The expiry time to be used for the timer.
+ *
+ * @param ec Set to indicate what error occurred, if any.
+ *
+ * @return The number of asynchronous operations that were cancelled.
+ *
+ * @note If the timer has already expired when expires_from_now() is called,
+ * then the handlers for asynchronous wait operations will:
+ *
+ * @li have already been invoked; or
+ *
+ * @li have been queued for invocation in the near future.
+ *
+ * These handlers can no longer be cancelled, and therefore are passed an
+ * error code that indicates the successful completion of the wait operation.
+ */
+ std::size_t expires_from_now(const duration& expiry_time,
+ asio::error_code& ec)
+ {
+ return this->service.expires_from_now(
+ this->implementation, expiry_time, ec);
+ }
+
+ /// Perform a blocking wait on the timer.
+ /**
+ * This function is used to wait for the timer to expire. This function
+ * blocks and does not return until the timer has expired.
+ *
+ * @throws asio::system_error Thrown on failure.
+ */
+ void wait()
+ {
+ asio::error_code ec;
+ this->service.wait(this->implementation, ec);
+ asio::detail::throw_error(ec, "wait");
+ }
+
+ /// Perform a blocking wait on the timer.
+ /**
+ * This function is used to wait for the timer to expire. This function
+ * blocks and does not return until the timer has expired.
+ *
+ * @param ec Set to indicate what error occurred, if any.
+ */
+ void wait(asio::error_code& ec)
+ {
+ this->service.wait(this->implementation, ec);
+ }
+
+ /// Start an asynchronous wait on the timer.
+ /**
+ * This function may be used to initiate an asynchronous wait against the
+ * timer. It always returns immediately.
+ *
+ * For each call to async_wait(), the supplied handler will be called exactly
+ * once. The handler will be called when:
+ *
+ * @li The timer has expired.
+ *
+ * @li The timer was cancelled, in which case the handler is passed the error
+ * code asio::error::operation_aborted.
+ *
+ * @param handler The handler to be called when the timer expires. Copies
+ * will be made of the handler as required. The function signature of the
+ * handler must be:
+ * @code void handler(
+ * const asio::error_code& error // Result of operation.
+ * ); @endcode
+ * Regardless of whether the asynchronous operation completes immediately or
+ * not, the handler will not be invoked from within this function. Invocation
+ * of the handler will be performed in a manner equivalent to using
+ * asio::io_service::post().
+ */
+ template <typename WaitHandler>
+ ASIO_INITFN_RESULT_TYPE(WaitHandler,
+ void (asio::error_code))
+ async_wait(ASIO_MOVE_ARG(WaitHandler) handler)
+ {
+ // If you get an error on the following line it means that your handler does
+ // not meet the documented type requirements for a WaitHandler.
+ ASIO_WAIT_HANDLER_CHECK(WaitHandler, handler) type_check;
+
+ return this->service.async_wait(this->implementation,
+ ASIO_MOVE_CAST(WaitHandler)(handler));
+ }
+};
+
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_BASIC_WAITABLE_TIMER_HPP