jrwlock.cpp
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/***************************************************************************
* Copyright (C) 2005 by Jeff Ferr *
* root@sat *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "Stdafx.h"
#include "jrwlock.h"
#include "jmutexexception.h"
namespace jthread {
RWLock::RWLock():
jcommon::Object()
{
jcommon::Object::SetClassName("jthread::RWLock");
#ifdef _WIN32
InitializeSRWLock(&_rwlock);
#else
pthread_rwlock_init(&_rwlock, NULL);
#endif
}
RWLock::~RWLock()
{
#ifdef _WIN32
#else
pthread_rwlock_destroy(&_rwlock);
#endif
}
void RWLock::ReadLock()
{
#ifdef _WIN32
AcquireSRWLockShared(&_rwlock);
#else
if (pthread_rwlock_rdlock(&_rwlock) != 0) {
if (errno == EDEADLK) {
throw MutexException("Error check monitor, dead lock ... !");
}
}
#endif
}
void RWLock::WriteLock()
{
#ifdef _WIN32
AcquireSRWLockExclusive(&_rwlock);
#else
if (pthread_rwlock_wrlock(&_rwlock) != 0) {
if (errno == EDEADLK) {
throw MutexException("Error check monitor, dead lock ... !");
}
}
#endif
}
void RWLock::ReadUnlock()
{
#ifdef _WIN32
ReleaseSRWLockShared(&_rwlock);
#else
if (pthread_rwlock_unlock(&_rwlock) != 0) {
if (errno == EINVAL || errno == EFAULT || errno == EPERM) {
throw MutexException("Error check monitor, calling thread does ... !");
}
}
#endif
}
void RWLock::WriteUnlock()
{
#ifdef _WIN32
ReleaseSRWLockExclusive(&_rwlock);
#else
if (pthread_rwlock_unlock(&_rwlock) != 0) {
if (errno == EINVAL || errno == EFAULT || errno == EPERM) {
throw MutexException("Error check monitor, calling thread does ... !");
}
}
#endif
}
bool RWLock::TryReadLock()
{
#ifdef _WIN32
if (TryAcquireSRWLockShared(&_rwlock) == 0) {
return false;
}
#else
if (pthread_rwlock_tryrdlock(&_rwlock) != 0) {
return false;
}
#endif
return true;
}
bool RWLock::TryWriteLock()
{
#ifdef _WIN32
if (TryAcquireSRWLockExclusive(&_rwlock) == 0) {
return false;
}
#else
if (pthread_rwlock_trywrlock(&_rwlock) != 0) {
return false;
}
#endif
return true;
}
}