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90 lines
3.7 KiB
90 lines
3.7 KiB
/***************************************************************************** |
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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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