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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 .
*/
#ifndef INCLUDED_COMPHELPER_SOLARMUTEX_HXX
#define INCLUDED_COMPHELPER_SOLARMUTEX_HXX
#include <sal/config.h>
#include <assert.h>
#include <atomic>
#include <thread>
#include <osl/mutex.hxx>
#include <comphelper/comphelperdllapi.h>
namespace comphelper {
/**
* SolarMutex, needed for VCL's Application::GetSolarMutex().
*
* The SolarMutex is the one big recursive code lock used
* to protect the vast majority of the LibreOffice code-base,
* in particular anything that is graphical and the cores of
* the applications.
*
* Treat this as a singleton, as its constructor sets a global
* pointing at itself.
*/
class COMPHELPER_DLLPUBLIC SolarMutex {
public:
typedef void (*BeforeReleaseHandler) ();
SolarMutex();
virtual ~SolarMutex();
void SetBeforeReleaseHandler( const BeforeReleaseHandler& rLink )
{ m_aBeforeReleaseHandler = rLink; }
void acquire( sal_uInt32 nLockCount = 1 );
sal_uInt32 release( bool bUnlockAll = false );
virtual bool tryToAcquire();
// returns true, if the mutex is owned by the current thread
virtual bool IsCurrentThread() const;
/// Help components to get the SolarMutex easily.
static SolarMutex *get();
protected:
virtual sal_uInt32 doRelease( bool bUnlockAll );
virtual void doAcquire( sal_uInt32 nLockCount );
osl::Mutex m_aMutex;
sal_uInt32 m_nCount;
private:
std::atomic<std::thread::id> m_nThreadId;
SolarMutex(const SolarMutex&) = delete;
SolarMutex& operator=(const SolarMutex&) = delete;
BeforeReleaseHandler m_aBeforeReleaseHandler;
};
inline void SolarMutex::acquire( sal_uInt32 nLockCount )
{
assert( nLockCount > 0 );
doAcquire( nLockCount );
}
inline sal_uInt32 SolarMutex::release( bool bUnlockAll )
{
return doRelease( bUnlockAll );
}
}
#endif // INCLUDED_COMPHELPER_SOLARMUTEX_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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