forked from Archive/PX4-Autopilot
91 lines
3.7 KiB
C
91 lines
3.7 KiB
C
/*****************************************************************************
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* sched/sched_wait.c
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*****************************************************************************/
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/*****************************************************************************
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* Included Files
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*****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include <errno.h>
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#include <nuttx/sched.h>
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#include "os_internal.h"
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#if defined(CONFIG_SCHED_WAITPID) && defined(CONFIG_SCHED_HAVE_PARENT)
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/*****************************************************************************
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* Private Functions
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*****************************************************************************/
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/*****************************************************************************
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* Public Functions
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*****************************************************************************/
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/*****************************************************************************
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* Name: wait
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*
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* Description:
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* The wait() function will suspend execution of the calling thread until
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* status information for one of its terminated child processes is
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* available, or until delivery of a signal whose action is either to
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* execute a signal-catching function or to terminate the process. If more
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* than one thread is suspended in wait() or waitpid() awaiting termination
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* of the same process, exactly one thread will return the process status
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* at the time of the target process termination. If status information is
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* available prior to the call to wait(), return will be immediate.
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*
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* The waitpid() function will behave identically to wait(), if the pid
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* argument is (pid_t)-1 and the options argument is 0. Otherwise, its
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* behaviour will be modified by the values of the pid and options arguments.
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*
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* Input Parameters:
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* stat_loc - The location to return the exit status
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*
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* Returned Value:
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* See waitpid();
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*
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*****************************************************************************/
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pid_t wait(FAR int *stat_loc)
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{
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return waitpid((pid_t)-1, stat_loc, 0);
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}
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#endif /* CONFIG_SCHED_WAITPID && CONFIG_SCHED_HAVE_PARENT*/
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