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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#if defined LINUX
// to define __USE_UNIX98, via _XOPEN_SOURCE, enabling pthread_mutexattr_settype
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#endif
#include "system.hxx"
#include "unixerrnostring.hxx"
#include <sal/log.hxx>
#include <osl/mutex.h>
#include <pthread.h>
#include <stdlib.h>
typedef struct _oslMutexImpl
{
pthread_mutex_t mutex;
} oslMutexImpl;
oslMutex SAL_CALL osl_createMutex()
{
oslMutexImpl* pMutex = static_cast<oslMutexImpl*>(malloc(sizeof(oslMutexImpl)));
pthread_mutexattr_t aMutexAttr;
int nRet=0;
SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");
if ( pMutex == nullptr )
{
return nullptr;
}
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 )
{
SAL_WARN("sal.osl.mutex", "pthread_muxex_init failed: " << UnixErrnoString(nRet));
free(pMutex);
pMutex = nullptr;
}
pthread_mutexattr_destroy(&aMutexAttr);
return pMutex;
}
void SAL_CALL osl_destroyMutex(oslMutex pMutex)
{
SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");
if ( pMutex != nullptr )
{
int nRet = pthread_mutex_destroy(&(pMutex->mutex));
if ( nRet != 0 )
{
SAL_WARN("sal.osl.mutex", "pthread_mutex_destroy failed: " << UnixErrnoString(nRet));
}
free(pMutex);
}
}
#ifdef __COVERITY__
extern void __coverity_recursive_lock_acquire__(void*);
extern void __coverity_recursive_lock_release__(void*);
extern void __coverity_assert_locked__(void*);
#endif
sal_Bool SAL_CALL osl_acquireMutex(oslMutex pMutex)
{
SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");
if ( pMutex != nullptr )
{
int nRet = pthread_mutex_lock(&(pMutex->mutex));
if ( nRet != 0 )
{
SAL_WARN("sal.osl.mutex", "pthread_mutex_lock failed: " << UnixErrnoString(nRet));
return false;
}
#ifdef __COVERITY__
__coverity_recursive_lock_acquire__(pMutex);
#endif
return true;
}
/* not initialized */
return false;
}
sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutex pMutex)
{
bool result = false;
SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");
if ( pMutex )
{
int nRet = pthread_mutex_trylock(&(pMutex->mutex));
if ( nRet == 0 )
{
#ifdef __COVERITY__
__coverity_recursive_lock_acquire__(pMutex);
#endif
result = true;
}
}
return result;
}
sal_Bool SAL_CALL osl_releaseMutex(oslMutex pMutex)
{
#ifdef __COVERITY__
__coverity_assert_locked__(pMutex);
#endif
SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");
if ( pMutex )
{
int nRet = pthread_mutex_unlock(&(pMutex->mutex));
if ( nRet != 0 )
{
SAL_WARN("sal.osl.mutex", "pthread_mutex_unlock failed: " << UnixErrnoString(nRet));
return false;
}
#ifdef __COVERITY__
__coverity_recursive_lock_release__(pMutex);
#endif
return true;
}
/* not initialized */
return false;
}
static oslMutexImpl globalMutexImpl;
static void globalMutexInitImpl() {
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 = &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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