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336fd879c0
POSIX states that creation of a mutex with default attributes is unspecified whether the mutex is recursive or non-recursive. We specifically want non-recursive (deadlock is desirable in flushing out coding bugs that used our mutex incorrectly). * src/util/threads-pthread.c (virMutexInit): Specifically request non-recursive mutex, rather than relying on unspecified default.
140 lines
2.9 KiB
C
140 lines
2.9 KiB
C
/*
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* threads-pthread.c: basic thread synchronization primitives
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*
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* Copyright (C) 2009-2010 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <config.h>
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/* Nothing special required for pthreads */
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int virThreadInitialize(void)
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{
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return 0;
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}
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void virThreadOnExit(void)
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{
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}
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int virMutexInit(virMutexPtr m)
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{
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int ret;
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pthread_mutexattr_t attr;
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pthread_mutexattr_init(&attr);
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
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if ((ret = pthread_mutex_init(&m->lock, &attr)) != 0) {
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errno = ret;
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return -1;
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}
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return 0;
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}
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void virMutexDestroy(virMutexPtr m)
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{
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pthread_mutex_destroy(&m->lock);
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}
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void virMutexLock(virMutexPtr m){
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pthread_mutex_lock(&m->lock);
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}
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void virMutexUnlock(virMutexPtr m)
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{
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pthread_mutex_unlock(&m->lock);
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}
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int virCondInit(virCondPtr c)
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{
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int ret;
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if ((ret = pthread_cond_init(&c->cond, NULL)) != 0) {
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errno = ret;
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return -1;
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}
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return 0;
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}
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int virCondDestroy(virCondPtr c)
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{
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int ret;
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if ((ret = pthread_cond_destroy(&c->cond)) != 0) {
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errno = ret;
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return -1;
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}
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return 0;
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}
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int virCondWait(virCondPtr c, virMutexPtr m)
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{
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int ret;
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if ((ret = pthread_cond_wait(&c->cond, &m->lock)) != 0) {
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errno = ret;
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return -1;
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}
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return 0;
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}
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int virCondWaitUntil(virCondPtr c, virMutexPtr m, unsigned long long whenms)
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{
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int ret;
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struct timespec ts;
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ts.tv_sec = whenms / 1000;
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ts.tv_nsec = (whenms % 1000) * 1000;
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if ((ret = pthread_cond_timedwait(&c->cond, &m->lock, &ts)) != 0) {
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errno = ret;
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return -1;
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}
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return 0;
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}
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void virCondSignal(virCondPtr c)
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{
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pthread_cond_signal(&c->cond);
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}
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void virCondBroadcast(virCondPtr c)
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{
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pthread_cond_broadcast(&c->cond);
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}
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int virThreadLocalInit(virThreadLocalPtr l,
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virThreadLocalCleanup c)
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{
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int ret;
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if ((ret = pthread_key_create(&l->key, c)) != 0) {
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errno = ret;
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return -1;
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}
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return 0;
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}
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void *virThreadLocalGet(virThreadLocalPtr l)
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{
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return pthread_getspecific(l->key);
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}
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void virThreadLocalSet(virThreadLocalPtr l, void *val)
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{
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pthread_setspecific(l->key, val);
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}
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