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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 .
*/
#pragma once
#include <osl/interlck.h>
#include <osl/mutex.hxx>
namespace framework
{
/**
* This acts like a rtl::Reference<osl::Mutex>
*/
class ShareableMutex
{
public:
ShareableMutex();
ShareableMutex( const ShareableMutex& rShareableMutex );
ShareableMutex& operator=( const ShareableMutex& rShareableMutex );
~ShareableMutex() { m_pMutexRef->release(); }
/** acquire the shared mutex */
void acquire();
/** release the shared mutex */
void release();
private:
/* ShareableMutex::MutexRef will destroy itself when the last ShareableMutex pointing to it is destroyed */
struct MutexRef
{
MutexRef() : m_refCount(0) {}
void acquire()
{
osl_atomic_increment( &m_refCount );
}
void release()
{
if ( osl_atomic_decrement( &m_refCount ) == 0 )
delete this;
}
oslInterlockedCount m_refCount;
osl::Mutex m_oslMutex;
};
MutexRef* m_pMutexRef;
};
class ShareGuard
{
public:
explicit ShareGuard( ShareableMutex& rShareMutex ) :
m_rShareMutex( rShareMutex )
{
m_rShareMutex.acquire();
}
~ShareGuard()
{
m_rShareMutex.release();
}
private:
ShareGuard& operator=( const ShareGuard& ) = delete;
ShareableMutex& m_rShareMutex;
};
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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