106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
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//***************************************************************************
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//
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// Copyright <20> Microsoft Corporation. All rights reserved.
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//
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// ThrdBase.h
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//
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// Purpose: Definition of ThreadBase class
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//
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//***************************************************************************
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#if _MSC_VER > 1000
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#pragma once
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#endif
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#ifndef __THREADBASE_H__
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#define __THREADBASE_H__
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class POLARITY CThreadBase
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{
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public:
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enum THREAD_SAFETY_MECHANISM
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{
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etsmFirst = 0,
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etsmSerialized = 0,
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etsmPriorityRead,
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etsmPriorityWrite,
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etsmLast
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};
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// Construction/Destruction
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CThreadBase( THREAD_SAFETY_MECHANISM etsm = etsmSerialized );
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virtual ~CThreadBase();
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// Thread Safe Ref/Counting functions
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LONG AddRef( void );
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LONG Release( void );
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// Provide Readable Read/Write accessors should
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// we not want to serialize at a later date. Note
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// that timeouts have no meaning unless we're
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// doing a non-serialized implementation.
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BOOL BeginRead( DWORD dwTimeOut = INFINITE );
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void EndRead( void );
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BOOL BeginWrite( DWORD dwTimeOut = INFINITE );
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void EndWrite( void );
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protected:
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virtual void OnFinalRelease( void );
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// Thread Safety functions
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private:
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CRITICAL_SECTION m_cs;
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LONG m_lRefCount;
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THREAD_SAFETY_MECHANISM m_etsm;
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// Private thread safety functions. We can maybe promote
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// these to protected if we see a need to later, however
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// for right now, everyone should specify if they mean
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// to read or write when they wish to access data that
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// may change.
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void Lock( void );
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void Unlock( void );
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};
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inline BOOL CThreadBase::BeginRead( DWORD dwTimeout /*=INFINITE*/ )
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{
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EnterCriticalSection( &m_cs );
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return TRUE;
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}
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inline void CThreadBase::EndRead( void )
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{
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LeaveCriticalSection( &m_cs );
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}
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inline BOOL CThreadBase::BeginWrite( DWORD dwTimeout /*=INFINITE*/ )
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{
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EnterCriticalSection( &m_cs );
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return TRUE;
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}
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inline void CThreadBase::EndWrite( void )
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{
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LeaveCriticalSection( &m_cs );
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}
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inline void CThreadBase::Lock( void )
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{
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EnterCriticalSection( &m_cs );
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}
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inline void CThreadBase::Unlock( void )
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{
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LeaveCriticalSection( &m_cs );
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}
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#endif
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