jsharedmutex.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 "jsharedmutex.h"
#include "jmemoryexception.h"
namespace jshared {
SharedMutex::SharedMutex(jsharedmutex_flags_t flags_):
jcommon::Object()
{
jcommon::Object::SetClassName("jshared::SharedMutex");
#ifdef _WIN32
#else
_flags = flags_;
_shmp = NULL;
_size = 0LL;
#endif
}
SharedMutex::SharedMutex(void *data_, int64_t size_):
jcommon::Object()
{
jcommon::Object::SetClassName("jshared::SharedMutex");
#ifdef _WIN32
#else
_flags = (jsharedmutex_flags_t)(JSF_CURRENT | JSF_FUTURE);
_shmp = (char *)data_;
_size = size_;
if ((void *)data_ == NULL) {
throw MemoryException("Data parameter was NULL");
}
if (_size <= 0LL) {
throw MemoryException("Size parameter was 0");
}
#endif
}
SharedMutex::~SharedMutex()
{
Release();
}
void SharedMutex::Lock()
{
#ifdef _WIN32
#else
if ((void *)_shmp == NULL) {
throw MemoryException("Null pointer exception");
}
if (mlock(_shmp, (size_t)_size) < 0) {
throw MemoryException("Lock memory error");
}
#endif
}
void SharedMutex::Unlock()
{
#ifdef _WIN32
#else
if ((void *)_shmp == NULL) {
throw MemoryException("Null pointer exception");
}
if (munlock(_shmp, (size_t)_size) < 0) {
throw MemoryException("Unlock memory error");
}
#endif
}
void SharedMutex::LockAll()
{
#ifdef _WIN32
#else
if ((void *)_shmp != NULL) {
throw MemoryException("Null pointer exception");
}
int flags = 0;
if ((_flags & JSF_CURRENT) != 0) {
flags = flags | MCL_CURRENT;
}
if ((_flags & JSF_FUTURE) != 0) {
flags = flags | MCL_FUTURE;
}
if (mlockall(flags) < 0) {
throw MemoryException("Lock error");
}
#endif
}
void SharedMutex::UnlockAll()
{
#ifdef _WIN32
#else
if ((void *)_shmp == NULL) {
throw MemoryException("Null pointer exception");
}
if (munlockall() < 0) {
throw MemoryException("Unlock error");
}
#endif
}
void SharedMutex::Release()
{
}
}