145 lines
4.6 KiB
C
145 lines
4.6 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.
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* 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(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(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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