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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "system.h"
#include <osl/mutex.h>
#include <osl/diagnose.h>
#include <pthread.h>
#include <stdlib.h>
#if defined LINUX /* bad hack */
int pthread_mutexattr_setkind_np(pthread_mutexattr_t *, int);
#define pthread_mutexattr_settype pthread_mutexattr_setkind_np
#define PTHREAD_MUTEX_RECURSIVE PTHREAD_MUTEX_RECURSIVE_NP
#endif
/*
Implementation notes:
oslMutex hides a pointer to the oslMutexImpl structure, which
ist needed to manage recursive locks on a mutex.
*/
typedef struct _oslMutexImpl
{
pthread_mutex_t mutex;
} oslMutexImpl;
/*****************************************************************************/
/* osl_createMutex */
/*****************************************************************************/
oslMutex SAL_CALL osl_createMutex()
{
oslMutexImpl* pMutex = (oslMutexImpl*) malloc(sizeof(oslMutexImpl));
pthread_mutexattr_t aMutexAttr;
int nRet=0;
OSL_ASSERT(pMutex);
if ( pMutex == 0 )
{
return 0;
}
pthread_mutexattr_init(&aMutexAttr);
nRet = pthread_mutexattr_settype(&aMutexAttr, PTHREAD_MUTEX_RECURSIVE);
if( nRet == 0 )
nRet = pthread_mutex_init(&(pMutex->mutex), &aMutexAttr);
if ( nRet != 0 )
{
OSL_TRACE("osl_createMutex : mutex init/setattr failed. Errno: %d; %s\n",
nRet, strerror(nRet));
free(pMutex);
pMutex = 0;
}
pthread_mutexattr_destroy(&aMutexAttr);
return (oslMutex) pMutex;
}
/*****************************************************************************/
/* osl_destroyMutex */
/*****************************************************************************/
void SAL_CALL osl_destroyMutex(oslMutex Mutex)
{
oslMutexImpl* pMutex = (oslMutexImpl*) Mutex;
OSL_ASSERT(pMutex);
if ( pMutex != 0 )
{
int nRet=0;
nRet = pthread_mutex_destroy(&(pMutex->mutex));
if ( nRet != 0 )
{
OSL_TRACE("osl_destroyMutex : mutex destroy failed. Errno: %d; %s\n",
nRet, strerror(nRet));
}
free(pMutex);
}
return;
}
/*****************************************************************************/
/* osl_acquireMutex */
/*****************************************************************************/
sal_Bool SAL_CALL osl_acquireMutex(oslMutex Mutex)
{
oslMutexImpl* pMutex = (oslMutexImpl*) Mutex;
OSL_ASSERT(pMutex);
if ( pMutex != 0 )
{
int nRet=0;
nRet = pthread_mutex_lock(&(pMutex->mutex));
if ( nRet != 0 )
{
OSL_TRACE("osl_acquireMutex : mutex lock failed. Errno: %d; %s\n",
nRet, strerror(nRet));
return sal_False;
}
return sal_True;
}
/* not initialized */
return sal_False;
}
/*****************************************************************************/
/* osl_tryToAcquireMutex */
/*****************************************************************************/
sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutex Mutex)
{
oslMutexImpl* pMutex = (oslMutexImpl*) Mutex;
OSL_ASSERT(pMutex);
if ( pMutex )
{
int nRet = 0;
nRet = pthread_mutex_trylock(&(pMutex->mutex));
if ( nRet != 0 )
return sal_False;
return sal_True;
}
/* not initialized */
return sal_False;
}
/*****************************************************************************/
/* osl_releaseMutex */
/*****************************************************************************/
sal_Bool SAL_CALL osl_releaseMutex(oslMutex Mutex)
{
oslMutexImpl* pMutex = (oslMutexImpl*) Mutex;
OSL_ASSERT(pMutex);
if ( pMutex )
{
int nRet=0;
nRet = pthread_mutex_unlock(&(pMutex->mutex));
if ( nRet != 0 )
{
OSL_TRACE("osl_releaseMutex : mutex unlock failed. Errno: %d; %s\n",
nRet, strerror(nRet));
return sal_False;
}
return sal_True;
}
/* not initialized */
return sal_False;
}
/*****************************************************************************/
/* osl_getGlobalMutex */
/*****************************************************************************/
static oslMutexImpl globalMutexImpl;
static void globalMutexInitImpl(void) {
pthread_mutexattr_t attr;
if (pthread_mutexattr_init(&attr) != 0 ||
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) ||
pthread_mutex_init(&globalMutexImpl.mutex, &attr) != 0 ||
pthread_mutexattr_destroy(&attr) != 0)
{
abort();
}
}
oslMutex * SAL_CALL osl_getGlobalMutex()
{
/* necessary to get a "oslMutex *" */
static oslMutex globalMutex = (oslMutex) &globalMutexImpl;
static pthread_once_t once = PTHREAD_ONCE_INIT;
if (pthread_once(&once, &globalMutexInitImpl) != 0) {
abort();
}
return &globalMutex;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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