135 lines
3.8 KiB
C++
135 lines
3.8 KiB
C++
/*
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Copyright (C) 2006 Grame
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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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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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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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Grame Research Laboratory, 9 rue du Garet, 69001 Lyon - France
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grame@grame.fr
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*/
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#include "JackPosixMutex.h"
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#include "JackError.h"
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namespace Jack
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{
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JackBasePosixMutex::JackBasePosixMutex(const char* name)
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:fOwner(0)
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{
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int res = pthread_mutex_init(&fMutex, NULL);
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ThrowIf(res != 0, JackException("JackBasePosixMutex: could not init the mutex"));
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}
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JackBasePosixMutex::~JackBasePosixMutex()
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{
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pthread_mutex_destroy(&fMutex);
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}
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bool JackBasePosixMutex::Lock()
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{
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pthread_t current_thread = pthread_self();
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if (!pthread_equal(current_thread, fOwner)) {
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int res = pthread_mutex_lock(&fMutex);
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if (res == 0) {
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fOwner = current_thread;
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return true;
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} else {
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jack_error("JackBasePosixMutex::Lock res = %d", res);
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return false;
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}
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} else {
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return false;
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}
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}
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bool JackBasePosixMutex::Trylock()
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{
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pthread_t current_thread = pthread_self();
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if (!pthread_equal(current_thread, fOwner)) {
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int res = pthread_mutex_trylock(&fMutex);
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if (res == 0) {
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fOwner = current_thread;
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return true;
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} else {
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return false;
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}
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} else {
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return false;
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}
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}
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bool JackBasePosixMutex::Unlock()
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{
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if (pthread_equal(pthread_self(), fOwner)) {
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fOwner = 0;
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int res = pthread_mutex_unlock(&fMutex);
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if (res == 0) {
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return true;
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} else {
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jack_error("JackBasePosixMutex::Unlock res = %d", res);
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return false;
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}
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} else {
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return false;
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}
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}
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JackPosixMutex::JackPosixMutex(const char* name)
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{
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// Use recursive mutex
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pthread_mutexattr_t mutex_attr;
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int res;
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res = pthread_mutexattr_init(&mutex_attr);
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ThrowIf(res != 0, JackException("JackBasePosixMutex: could not init the mutex attribute"));
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res = pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_RECURSIVE);
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ThrowIf(res != 0, JackException("JackBasePosixMutex: could not settype the mutex"));
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res = pthread_mutex_init(&fMutex, &mutex_attr);
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ThrowIf(res != 0, JackException("JackBasePosixMutex: could not init the mutex"));
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pthread_mutexattr_destroy(&mutex_attr);
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}
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JackPosixMutex::~JackPosixMutex()
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{
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pthread_mutex_destroy(&fMutex);
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}
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bool JackPosixMutex::Lock()
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{
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int res = pthread_mutex_lock(&fMutex);
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if (res != 0) {
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jack_log("JackPosixMutex::Lock res = %d", res);
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}
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return (res == 0);
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}
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bool JackPosixMutex::Trylock()
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{
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return (pthread_mutex_trylock(&fMutex) == 0);
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}
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bool JackPosixMutex::Unlock()
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{
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int res = pthread_mutex_unlock(&fMutex);
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if (res != 0) {
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jack_log("JackPosixMutex::Unlock res = %d", res);
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}
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return (res == 0);
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}
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} // namespace
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