/* -*- 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 {
SolarMutex* g_pSolarMutex = nullptr;
}
SolarMutex *SolarMutex::get()
{
return g_pSolarMutex;
}
SolarMutex::SolarMutex()
: m_nCount( 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 = std::this_thread::get_id();
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 = std::thread::id();
}
for ( sal_uInt32 n = nCount ; n ; --n )
m_aMutex.release();
return nCount;
}
bool SolarMutex::IsCurrentThread() const
{
return m_nThreadId == std::this_thread::get_id();
}
bool SolarMutex::tryToAcquire()
{
if ( m_aMutex.tryToAcquire() )
{
m_nThreadId = std::this_thread::get_id();
m_nCount++;
return true ;
}
else
return false ;
}
} // namespace comphelper
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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