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- /****************************************************************************
- * sched/pthread/pthread_mutexinconsistent.c
- *
- * Copyright (C) 2017 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 <pthread.h>
- #include <sched.h>
- #include <assert.h>
- #include <errno.h>
- #include <nuttx/sched.h>
- #include <nuttx/semaphore.h>
- #include "pthread/pthread.h"
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: pthread_mutex_inconsistent
- *
- * Description:
- * This function is called when a pthread is terminated via either
- * pthread_exit() or pthread_cancel(). It will check for any mutexes
- * held by exitting thread. It will mark them as inconsistent and
- * then wake up the highest priority waiter for the mutex. That
- * instance of pthread_mutex_lock() will then return EOWNERDEAD.
- *
- * Input Parameters:
- * tcb -- a reference to the TCB of the exitting pthread.
- *
- * Returned Value:
- * None.
- *
- ****************************************************************************/
- void pthread_mutex_inconsistent(FAR struct pthread_tcb_s *tcb)
- {
- FAR struct pthread_mutex_s *mutex;
- irqstate_t flags;
- DEBUGASSERT(tcb != NULL);
- sched_lock();
- /* Remove and process each mutex from the list of mutexes held by this task */
- while (tcb->mhead != NULL)
- {
- /* Remove the mutex from the TCB list */
- flags = enter_critical_section();
- mutex = tcb->mhead;
- tcb->mhead = mutex->flink;
- mutex->flink = NULL;
- leave_critical_section(flags);
- /* Mark the mutex as INCONSISTENT and wake up any waiting thread */
- mutex->flags |= _PTHREAD_MFLAGS_INCONSISTENT;
- (void)pthread_sem_give(&mutex->sem);
- }
- sched_unlock();
- }
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