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/*
Copyright (C) 2006 Grame
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Grame Research Laboratory, 9 rue du Garet, 69001 Lyon - France
grame@grame.fr
*/
#include "JackPosixMutex.h"
#include "JackError.h"
namespace Jack
{
JackBasePosixMutex::JackBasePosixMutex(const char* name)
:fOwner(0)
{
int res = pthread_mutex_init(&fMutex, NULL);
ThrowIf(res != 0, JackException("JackBasePosixMutex: could not init the mutex"));
}
JackBasePosixMutex::~JackBasePosixMutex()
{
pthread_mutex_destroy(&fMutex);
}
bool JackBasePosixMutex::Lock()
{
pthread_t current_thread = pthread_self();
if (!pthread_equal(current_thread, fOwner)) {
int res = pthread_mutex_lock(&fMutex);
if (res == 0) {
fOwner = current_thread;
return true;
} else {
jack_error("JackBasePosixMutex::Lock res = %d", res);
return false;
}
} else {
return false;
}
}
bool JackBasePosixMutex::Trylock()
{
pthread_t current_thread = pthread_self();
if (!pthread_equal(current_thread, fOwner)) {
int res = pthread_mutex_trylock(&fMutex);
if (res == 0) {
fOwner = current_thread;
return true;
} else {
return false;
}
} else {
return false;
}
}
bool JackBasePosixMutex::Unlock()
{
if (pthread_equal(pthread_self(), fOwner)) {
fOwner = 0;
int res = pthread_mutex_unlock(&fMutex);
if (res == 0) {
return true;
} else {
jack_error("JackBasePosixMutex::Unlock res = %d", res);
return false;
}
} else {
return false;
}
}
JackPosixMutex::JackPosixMutex(const char* name)
{
// Use recursive mutex
pthread_mutexattr_t mutex_attr;
int res;
res = pthread_mutexattr_init(&mutex_attr);
ThrowIf(res != 0, JackException("JackBasePosixMutex: could not init the mutex attribute"));
res = pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_RECURSIVE);
ThrowIf(res != 0, JackException("JackBasePosixMutex: could not settype the mutex"));
res = pthread_mutex_init(&fMutex, &mutex_attr);
ThrowIf(res != 0, JackException("JackBasePosixMutex: could not init the mutex"));
pthread_mutexattr_destroy(&mutex_attr);
}
JackPosixMutex::~JackPosixMutex()
{
pthread_mutex_destroy(&fMutex);
}
bool JackPosixMutex::Lock()
{
int res = pthread_mutex_lock(&fMutex);
if (res != 0) {
jack_log("JackPosixMutex::Lock res = %d", res);
}
return (res == 0);
}
bool JackPosixMutex::Trylock()
{
return (pthread_mutex_trylock(&fMutex) == 0);
}
bool JackPosixMutex::Unlock()
{
int res = pthread_mutex_unlock(&fMutex);
if (res != 0) {
jack_log("JackPosixMutex::Unlock res = %d", res);
}
return (res == 0);
}
} // namespace
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