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138 lines
3.1 KiB
138 lines
3.1 KiB
//***************************************************************************
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//
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// Copyright (c) 1997-2001 Microsoft Corporation, All Rights Reserved
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//
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// ThreadBase.CPP
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//
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// Purpose: Implementation of CThreadBase class
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//
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//***************************************************************************
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#include "precomp.h"
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#include <assertbreak.h>
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////////////////////////////////////////////////////////////////////////
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//
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// Function: CThreadBase::CThreadBase
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//
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// Class Constructor.
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//
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// Inputs: THREAD_SAFETY_MECHANISM etsm - Thread Safety Mechanism.
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//
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// Outputs: None.
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//
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// Return: None.
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//
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// Comments: None.
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//
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////////////////////////////////////////////////////////////////////////
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CThreadBase::CThreadBase( THREAD_SAFETY_MECHANISM etsm /*=etsmSerialized*/ )
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: m_lRefCount( 1 ), // Our initial ref count is always 1
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m_etsm( etsm )
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{
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InitializeCriticalSection( &m_cs ); // Void function, so it best work.
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: CThreadBase::~CThreadBase
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//
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// Class Destructor.
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//
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// Inputs: None.
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//
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// Outputs: None.
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//
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// Return: None.
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//
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// Comments: None.
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//
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////////////////////////////////////////////////////////////////////////
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CThreadBase::~CThreadBase( void )
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{
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DeleteCriticalSection( &m_cs );
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: CThreadBase::OnFinalRelease
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//
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// Virtual function called by Release() when our RefCount reaches 0.
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//
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// Inputs: None.
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//
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// Outputs: None.
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//
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// Return: None.
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//
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// Comments: Override if you want, but always call down to the base
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// implementation and let it call delete on 'this'.
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//
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////////////////////////////////////////////////////////////////////////
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void CThreadBase::OnFinalRelease( void )
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{
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delete this;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: CThreadBase::AddRef
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//
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// Increases our Reference count by one.
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//
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// Inputs: None.
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//
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// Outputs: None.
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//
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// Return: None.
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//
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// Comments: Uses Lock(), Unlock() to protect the data. We may want
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// to change the function to use InterlockedIncrement().
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//
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////////////////////////////////////////////////////////////////////////
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LONG CThreadBase::AddRef( void )
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{
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LONG nRet = InterlockedIncrement(&m_lRefCount);
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return nRet;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Function: CThreadBase::Release
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//
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// Decreases our Reference count by one.
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//
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// Inputs: None.
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//
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// Outputs: None.
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//
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// Return: None.
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//
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// Comments: Uses Lock(), Unlock() to protect the data. We may want
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// to use InterlockedDecrement();
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//
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////////////////////////////////////////////////////////////////////////
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LONG CThreadBase::Release( void )
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{
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LONG nRet;
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BOOL fFinalRelease = ( (nRet = InterlockedDecrement(&m_lRefCount)) == 0 );
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ASSERT_BREAK(nRet >= 0);
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if ( fFinalRelease )
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{
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OnFinalRelease();
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}
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return nRet;
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}
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