88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/****************************************************************************
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* sched/pthread/pthread_mutexinconsistent.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <pthread.h>
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#include <sched.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/sched.h>
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#include <nuttx/semaphore.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_mutex_inconsistent
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*
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* Description:
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* This function is called when a pthread is terminated via either
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* pthread_exit() or pthread_cancel(). It will check for any mutexes
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* held by exitting thread. It will mark them as inconsistent and
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* then wake up the highest priority waiter for the mutex. That
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* instance of pthread_mutex_lock() will then return EOWNERDEAD.
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*
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* Input Parameters:
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* tcb -- a reference to the TCB of the exitting pthread.
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*
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* Returned Value:
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* None.
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*
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****************************************************************************/
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void pthread_mutex_inconsistent(FAR struct tcb_s *tcb)
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{
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FAR struct pthread_mutex_s *mutex;
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irqstate_t flags;
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DEBUGASSERT(tcb != NULL);
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sched_lock();
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/* Remove and process each mutex held by this task */
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while (tcb->mhead != NULL)
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{
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/* Remove the mutex from the TCB list */
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flags = enter_critical_section();
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mutex = tcb->mhead;
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tcb->mhead = mutex->flink;
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mutex->flink = NULL;
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leave_critical_section(flags);
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/* Mark the mutex as INCONSISTENT and wake up any waiting thread */
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mutex->flags |= _PTHREAD_MFLAGS_INCONSISTENT;
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pthread_sem_give(&mutex->sem);
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}
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sched_unlock();
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}
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