/*****************************************************************************
* 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 */
