6a3c2aded6
* Simplify EINTR/ECANCEL error handling 1. Add semaphore uninterruptible wait function 2 .Replace semaphore wait loop with a single uninterruptible wait 3. Replace all sem_xxx to nxsem_xxx * Unify the void cast usage 1. Remove void cast for function because many place ignore the returned value witout cast 2. Replace void cast for variable with UNUSED macro
145 lines
4.7 KiB
C
145 lines
4.7 KiB
C
/****************************************************************************
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* sched/pthread/pthread_exit.c
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*
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* Copyright (C) 2007, 2009, 2011-2013, 2017 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 <stdint.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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#include <pthread.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/signal.h>
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#include "sched/sched.h"
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#include "task/task.h"
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#include "pthread/pthread.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pthread_exit
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*
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* Description:
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* Terminate execution of a thread started with pthread_create.
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*
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* Input Parameters:
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* exit_valie
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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*
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****************************************************************************/
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void pthread_exit(FAR void *exit_value)
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{
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FAR struct tcb_s *tcb = this_task();
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sigset_t set = ALL_SIGNAL_SET;
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int status;
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sinfo("exit_value=%p\n", exit_value);
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DEBUGASSERT(tcb != NULL);
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DEBUGASSERT((tcb->flags & TCB_FLAG_TTYPE_MASK) == TCB_FLAG_TTYPE_PTHREAD);
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/* Block any signal actions that would awaken us while were
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* are performing the JOIN handshake.
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*/
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nxsig_procmask(SIG_SETMASK, &set, NULL);
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#ifdef CONFIG_CANCELLATION_POINTS
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/* Mark the pthread as non-cancelable to avoid additional calls to
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* pthread_exit() due to any cancellation point logic that might get
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* kicked off by actions taken during pthread_exit processing.
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*/
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tcb->flags |= TCB_FLAG_NONCANCELABLE;
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tcb->flags &= ~TCB_FLAG_CANCEL_PENDING;
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tcb->cpcount = 0;
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#endif
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#ifdef CONFIG_PTHREAD_CLEANUP
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/* Perform any stack pthread clean-up callbacks */
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pthread_cleanup_popall((FAR struct pthread_tcb_s *)tcb);
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#endif
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/* Complete pending join operations */
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status = pthread_completejoin(getpid(), exit_value);
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if (status != OK)
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{
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/* Assume that the join completion failured because this
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* not really a pthread. Exit by calling exit().
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*/
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exit(EXIT_FAILURE);
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}
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#ifndef CONFIG_PTHREAD_MUTEX_UNSAFE
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/* Recover any mutexes still held by the canceled thread */
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pthread_mutex_inconsistent((FAR struct pthread_tcb_s *)tcb);
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#endif
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/* Perform common task termination logic. This will get called again later
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* through logic kicked off by _exit(). However, we need to call it before
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* calling _exit() in order certain operations if this is the last thread
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* of a task group: (2) To handle atexit() and on_exit() callbacks and
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* (2) so that we can flush buffered I/O (which may required suspending).
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*/
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nxtask_exithook(tcb, EXIT_SUCCESS, false);
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/* Then just exit, retaining all file descriptors and without
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* calling atexit() functions.
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*/
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_exit(EXIT_SUCCESS);
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}
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