b8e53dad52
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5515 42af7a65-404d-4744-a932-0658087f49c3
91 lines
3.7 KiB
C
91 lines
3.7 KiB
C
/*****************************************************************************
|
|
* sched/sched_wait.c
|
|
*
|
|
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Included Files
|
|
*****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/wait.h>
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/sched.h>
|
|
|
|
#include "os_internal.h"
|
|
|
|
#if defined(CONFIG_SCHED_WAITPID) && defined(CONFIG_SCHED_HAVE_PARENT)
|
|
|
|
/*****************************************************************************
|
|
* Private Functions
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Public Functions
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Name: wait
|
|
*
|
|
* Description:
|
|
* The wait() function will suspend execution of the calling thread until
|
|
* status information for one of its terminated child processes is
|
|
* available, or until delivery of a signal whose action is either to
|
|
* execute a signal-catching function or to terminate the process. If more
|
|
* than one thread is suspended in wait() or waitpid() awaiting termination
|
|
* of the same process, exactly one thread will return the process status
|
|
* at the time of the target process termination. If status information is
|
|
* available prior to the call to wait(), return will be immediate.
|
|
*
|
|
* The waitpid() function will behave identically to wait(), if the pid
|
|
* argument is (pid_t)-1 and the options argument is 0. Otherwise, its
|
|
* behaviour will be modified by the values of the pid and options arguments.
|
|
*
|
|
* Input Parameters:
|
|
* stat_loc - The location to return the exit status
|
|
*
|
|
* Returned Value:
|
|
* See waitpid();
|
|
*
|
|
*****************************************************************************/
|
|
|
|
pid_t wait(FAR int *stat_loc)
|
|
{
|
|
return waitpid((pid_t)-1, stat_loc, 0);
|
|
}
|
|
|
|
#endif /* CONFIG_SCHED_WAITPID && CONFIG_SCHED_HAVE_PARENT*/
|