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/*************************************************************************
*
* $RCSfile: mutex.hxx,v $
*
* $Revision: 1.2 $
*
* last change: $Author: martin.maher $ $Date: 2000-09-29 14:40:09 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* 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
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (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.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2000 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
#ifndef _OSL_MUTEX_HXX_
#define _OSL_MUTEX_HXX_
#ifdef __cplusplus
#include <osl/macros.hxx>
#include <osl/mutex.h>
#ifdef _USE_NAMESPACE
namespace osl
{
#endif
class Mutex {
oslMutex mutex;
// these make no sense
Mutex( oslMutex ) {}
Mutex( const Mutex & ) {}
public:
/** Create a thread-local mutex.
@return 0 if the mutex could not be created, otherwise a handle to the mutex.
*/
Mutex()
{
mutex = osl_createMutex();
}
/** Release the OS-structures and free mutex data-structure.
*/
~Mutex()
{
osl_destroyMutex(mutex);
}
/** Acquire the mutex, block if already acquired by another thread.
@return False if system-call fails.
*/
sal_Bool acquire()
{
return osl_acquireMutex(mutex);
}
/** Try to acquire the mutex without blocking.
@return False if it could not be acquired.
*/
sal_Bool tryToAcquire()
{
return osl_tryToAcquireMutex(mutex);
}
/** Release the mutex.
@return False if system-call fails.
*/
sal_Bool release()
{
return osl_releaseMutex(mutex);
}
static Mutex * getGlobalMutex()
{
return (Mutex *)osl_getGlobalMutex();
}
};
template<class T>
class Guard
{
protected:
T * pT;
public:
Guard(T * pT) : pT(pT)
{
pT->acquire();
}
Guard(T & t) : pT(&t)
{
pT->acquire();
}
/** Releases mutex. */
~Guard()
{
pT->release();
}
};
template<class T>
class ClearableGuard
{
protected:
T * pT;
public:
ClearableGuard(T * pT) : pT(pT)
{
pT->acquire();
}
ClearableGuard(T & t) : pT(&t)
{
pT->acquire();
}
/** Releases mutex. */
~ClearableGuard()
{
if (pT)
pT->release();
}
/** Releases mutex. */
void clear()
{
if(pT)
{
pT->release();
pT = NULL;
}
}
};
typedef Guard<Mutex> MutexGuard;
typedef ClearableGuard<Mutex> ClearableMutexGuard;
#ifdef _USE_NAMESPACE
}
#endif
#endif /* __cplusplus */
#endif /* _OSL_MUTEX_HXX_ */
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