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Posted to commits@nuttx.apache.org by xi...@apache.org on 2020/09/19 08:07:02 UTC
[incubator-nuttx] branch master updated: unistd/priority: Implement
[s/g]etpriority(2) syscall
This is an automated email from the ASF dual-hosted git repository.
xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git
The following commit(s) were added to refs/heads/master by this push:
new 0f06c35 unistd/priority: Implement [s/g]etpriority(2) syscall
0f06c35 is described below
commit 0f06c35640b3851cd0d35e0067281b4a5251333b
Author: chao.an <an...@xiaomi.com>
AuthorDate: Thu Sep 17 15:24:57 2020 +0800
unistd/priority: Implement [s/g]etpriority(2) syscall
See the reference here:
https://pubs.opengroup.org/onlinepubs/009695399/functions/getpriority.html
Signed-off-by: chao.an <an...@xiaomi.com>
---
libs/libc/unistd/Make.defs | 1 +
libs/libc/unistd/lib_getpriority.c | 72 +++++++++++++++++++++++++++++++++++++
libs/libc/unistd/lib_setpriority.c | 74 ++++++++++++++++++++++++++++++++++++++
3 files changed, 147 insertions(+)
diff --git a/libs/libc/unistd/Make.defs b/libs/libc/unistd/Make.defs
index b572444..25eebf0 100644
--- a/libs/libc/unistd/Make.defs
+++ b/libs/libc/unistd/Make.defs
@@ -42,6 +42,7 @@ CSRCS += lib_seteuid.c lib_setegid.c lib_geteuid.c lib_getegid.c
CSRCS += lib_setreuid.c lib_setregid.c
CSRCS += lib_getrusage.c lib_utimes.c
CSRCS += lib_setrlimit.c lib_getrlimit.c
+CSRCS += lib_setpriority.c lib_getpriority.c
ifneq ($(CONFIG_SCHED_USER_IDENTITY),y)
CSRCS += lib_setuid.c lib_setgid.c lib_getuid.c lib_getgid.c
diff --git a/libs/libc/unistd/lib_getpriority.c b/libs/libc/unistd/lib_getpriority.c
new file mode 100644
index 0000000..03747a4
--- /dev/null
+++ b/libs/libc/unistd/lib_getpriority.c
@@ -0,0 +1,72 @@
+/****************************************************************************
+ * libs/libc/unistd/lib_getpriority.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sched.h>
+
+#include <errno.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: getpriority
+ *
+ * Description:
+ * The getpriority() function shall obtain the nice value of a process,
+ * process group, or user.
+ *
+ * Input Parameters:
+ * which - PRIO_PROCESS, PRIO_PGRP, or PRIO_USER, ignored in current
+ * implementation.
+ * who - Process id is interpreted relative to "which"
+ *
+ * Returned Value:
+ * Upon successful completion, getpriority() shall return an integer in
+ * the range -{NZERO} to {NZERO}-1. Otherwise, -1 shall be returned and
+ * errno set to indicate the error.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int getpriority(int which, id_t who)
+{
+ struct sched_param param;
+ int ret;
+
+ if (who == 0)
+ {
+ who = getpid();
+ }
+
+ ret = sched_getparam(who, ¶m);
+ if (ret < 0)
+ {
+ return ret;
+ }
+
+ return param.sched_priority;
+}
diff --git a/libs/libc/unistd/lib_setpriority.c b/libs/libc/unistd/lib_setpriority.c
new file mode 100644
index 0000000..14195eb
--- /dev/null
+++ b/libs/libc/unistd/lib_setpriority.c
@@ -0,0 +1,74 @@
+/****************************************************************************
+ * libs/libc/unistd/lib_setpriority.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sched.h>
+
+#include <errno.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: setpriority
+ *
+ * Description:
+ * The setpriority() function shall set the nice value of a process,
+ * process group, or user to value+ {NZERO}.
+ *
+ * Input Parameters:
+ * which - PRIO_PROCESS, PRIO_PGRP, or PRIO_USER, ignored in current
+ * implementation.
+ * who - Process id is interpreted relative to "which"
+ * value - Value in the range SCHED_PRIORITY_MIN to SCHED_PRIORITY_MAX
+ *
+ * Returned Value:
+ * Upon successful completion, setpriority() shall return 0; otherwise,
+ * -1 shall be returned and errno set to indicate the error.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int setpriority(int which, id_t who, int value)
+{
+ struct sched_param param;
+ int ret;
+
+ if (who == 0)
+ {
+ who = getpid();
+ }
+
+ ret = sched_getparam(who, ¶m);
+ if (ret < 0)
+ {
+ return ret;
+ }
+
+ param.sched_priority = value;
+
+ return sched_setparam(who, ¶m);
+}