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Diffstat (limited to 'nuttx/sched/sched_wait.c')
-rw-r--r-- | nuttx/sched/sched_wait.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/nuttx/sched/sched_wait.c b/nuttx/sched/sched_wait.c new file mode 100644 index 000000000..813d4f842 --- /dev/null +++ b/nuttx/sched/sched_wait.c @@ -0,0 +1,90 @@ +/***************************************************************************** + * 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*/ |