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f895e611df
This patch adds recursive locks necessary due to the processing of network filter XML that can reference other network filters, including references that cause looks. Loops in the XML are prevented but their detection requires recursive locks. Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
153 lines
3.2 KiB
C
153 lines
3.2 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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int virMutexInitRecursive(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_RECURSIVE);
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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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