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113 lines
2.2 KiB
C++
113 lines
2.2 KiB
C++
/*
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* XBMC Media Center
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* Copyright (c) 2002 Frodo
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* Portions Copyright (c) by the authors of ffmpeg and xvid
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "SingleLock.h"
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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CSingleLock::CSingleLock(CCriticalSection& cs)
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: m_cs( cs )
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, m_bIsOwner( false )
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{
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Enter();
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}
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CSingleLock::CSingleLock(const CCriticalSection& cs)
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: m_cs( const_cast<CCriticalSection&>(cs) )
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, m_bIsOwner( false )
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{
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Enter();
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}
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CSingleLock::~CSingleLock()
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{
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Leave();
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}
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bool CSingleLock::IsOwner() const
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{
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return m_bIsOwner;
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}
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bool CSingleLock::Enter()
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{
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// Test if we already own the critical section
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if ( true == m_bIsOwner )
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{
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return true;
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}
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// Blocking call
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::EnterCriticalSection( m_cs );
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m_bIsOwner = true;
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return m_bIsOwner;
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}
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void CSingleLock::Leave()
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{
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if ( false == m_bIsOwner )
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{
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return ;
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}
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::LeaveCriticalSection( m_cs );
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m_bIsOwner = false;
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}
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CSingleExit::CSingleExit(CCriticalSection& cs)
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: m_cs( cs )
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, m_count(0)
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{
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Exit();
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}
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CSingleExit::CSingleExit(const CCriticalSection& cs)
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: m_cs(const_cast<CCriticalSection&>(cs))
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, m_count(0)
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{
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Exit();
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}
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CSingleExit::~CSingleExit()
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{
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Restore();
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}
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void CSingleExit::Exit()
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{
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if(m_count == 0)
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m_count = ::ExitCriticalSection(m_cs);
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}
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void CSingleExit::Restore()
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{
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if(m_count)
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{
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RestoreCriticalSection(m_cs, m_count);
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m_count = 0;
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}
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}
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