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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 .
*/
#include <sal/config.h>
#include <comphelper/solarmutex.hxx>
#include <osl/thread.hxx>
#include <assert.h>
#include <cstdlib>
namespace comphelper {
namespace {
static SolarMutex* g_pSolarMutex = nullptr;
}
SolarMutex *SolarMutex::get()
{
return g_pSolarMutex;
}
SolarMutex::SolarMutex()
: m_nCount( 0 )
, m_nThreadId( 0 )
, m_aBeforeReleaseHandler( nullptr )
{
assert(!g_pSolarMutex);
g_pSolarMutex = this;
}
SolarMutex::~SolarMutex()
{
g_pSolarMutex = nullptr;
}
void SolarMutex::doAcquire( const sal_uInt32 nLockCount )
{
for ( sal_uInt32 n = nLockCount; n ; --n )
m_aMutex.acquire();
m_nThreadId = osl::Thread::getCurrentIdentifier();
m_nCount += nLockCount;
}
sal_uInt32 SolarMutex::doRelease( bool bUnlockAll )
{
if ( !IsCurrentThread() )
std::abort();
if ( m_nCount == 0 )
std::abort();
const sal_uInt32 nCount = bUnlockAll ? m_nCount : 1;
m_nCount -= nCount;
if ( 0 == m_nCount )
{
if ( m_aBeforeReleaseHandler )
m_aBeforeReleaseHandler();
m_nThreadId = 0;
}
for ( sal_uInt32 n = nCount ; n ; --n )
m_aMutex.release();
return nCount;
}
bool SolarMutex::IsCurrentThread() const
{
return m_nThreadId == osl::Thread::getCurrentIdentifier();
}
bool SolarMutex::tryToAcquire()
{
if ( m_aMutex.tryToAcquire() )
{
m_nThreadId = osl::Thread::getCurrentIdentifier();
m_nCount++;
return true;
}
else
return false;
}
} // namespace comphelper
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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