unkimp.h

linux下的一款播放器

#else
    // These can be overriden in the derived object to provide
    // an object specific imp.
    STDMETHOD_(ULONG32,ActualAddRef) (THIS)
    {
#ifdef ENABLE_UNKIMP_TRACKER
	ULONG32 postAddRefRefCount = InterlockedIncrement(&m_lCount);
	if (ms_pIUnknownTracker)
	{
	    ms_pIUnknownTracker->OnIUnknownAddRef( this, postAddRefRefCount );
	}
	return postAddRefRefCount;
#else
	return InterlockedIncrement(&m_lCount);
#endif
    }
    STDMETHOD_(ULONG32,ActualRelease) (THIS)
    {
	HX_ASSERT(m_lCount>0);
#ifdef ENABLE_UNKIMP_TRACKER
	ULONG32 preReleaseRefCount = m_lCount;
	if (ms_pIUnknownTracker)
	{
	    ms_pIUnknownTracker->OnIUnknownRelease( this, preReleaseRefCount );
	}
#endif
	if (InterlockedDecrement(&m_lCount) > 0)
	{
	    return m_lCount;
	}

	FinalRelease();
	delete this;
	return 0;
    }
    STDMETHOD(FinalConstruct)()
    {
	return HXR_OK;
    }
    virtual void FinalRelease()
    {
    }
#endif
    LONG32 m_lCount;
    IUnknown* m_punkOuter;
    IUnknown* m_punkControlling;

    friend class CAggregateImpl;
private:

    CUnknownIMP(CUnknownIMP&) : IUnknown () {}
    
#ifdef ENABLE_UNKIMP_TRACKER
    static IHXIUnknownTracker* ms_pIUnknownTracker;
#endif
};

#ifdef INCLUDE_DEBUG_LIFETIME
#define INIT_DEBUG_LIFETIME(CLASS)			\
CUnknownIMP::InitFilename(#CLASS);
#else
#define INIT_DEBUG_LIFETIME(CLASS)
#endif

#ifdef ENABLE_UNKIMP_TRACKER
#define INIT_UNKIMP_TRACKER \
IHXIUnknownTracker* CUnknownIMP::ms_pIUnknownTracker = NULL;
#endif

class CAggregateImpl : public IUnknown
{
public:
    CAggregateImpl( CUnknownIMP* pobjAggregated )
	: m_lCount( 0 )
	, m_pobjAggregated( pobjAggregated )
    {}
    virtual ~CAggregateImpl()
    {
	delete m_pobjAggregated;
    }

    /*
     *	IUnknown methods
     */
    STDMETHOD(QueryInterface)
    (
	THIS_
	REFIID riid,
	void** ppvObj
    )
    {
	return m_pobjAggregated->_ActualQI(riid, ppvObj);
    }

    STDMETHOD_(ULONG32,AddRef) (THIS)
    {
#ifdef ENABLE_UNKIMP_TRACKER
	ULONG32 postAddRefRefCount = InterlockedIncrement(&m_lCount);
	if (CUnknownIMP::ms_pIUnknownTracker)
	{
	    CUnknownIMP::ms_pIUnknownTracker->OnIUnknownAddRef( m_pobjAggregated, postAddRefRefCount );
	}
	return postAddRefRefCount;
#else
	return InterlockedIncrement(&m_lCount);
#endif
    }

    STDMETHOD_(ULONG32,Release) (THIS)
    {
	HX_ASSERT(m_lCount>0);
#ifdef ENABLE_UNKIMP_TRACKER
	ULONG32 preReleaseRefCount = m_lCount;
	if (CUnknownIMP::ms_pIUnknownTracker)
	{
	    CUnknownIMP::ms_pIUnknownTracker->OnIUnknownRelease( m_pobjAggregated, preReleaseRefCount );
	}
#endif
	if (InterlockedDecrement(&m_lCount) > 0)
	{
	    return m_lCount;
	}

	delete this;
	return 0;
    }

private:
    LONG32 m_lCount;
    CUnknownIMP* m_pobjAggregated;

    CAggregateImpl(){}
    CAggregateImpl(CAggregateImpl&) : IUnknown () {}
};


inline STDMETHODIMP
CUnknownIMP::SetupAggregation( IUnknown* pvOuterObj, IUnknown** pvResult )
{
    if( !pvResult )
	return HXR_POINTER;

    // Initial result code, initialize out parameter
    HX_RESULT result = HXR_FAIL;
    *pvResult = NULL;

    // This can only happen before any calls to AddRef()
    HX_ASSERT( 0 == m_lCount );

    if( !m_lCount )
    {
	if(pvOuterObj)
	{
	    m_punkOuter = pvOuterObj;
	    m_punkControlling = new CAggregateImpl( this );
	    m_punkControlling->AddRef();

	    result = HXR_OK;
	}
	else
	{
	    result = QueryInterface( IID_IUnknown, (void**) &m_punkControlling );
	    HX_ASSERT( SUCCEEDED( result ) );
	}
    }

    if( SUCCEEDED( result ) )
	*pvResult = m_punkControlling;

    return result;
}


#define DECLARE_UNKNOWN(THIS_CLASS)				\
	DECLARE_COM_CREATE_FUNCS(THIS_CLASS)			\
    public:							\
	STDMETHOD(QueryInterface)				\
	(							\
	    THIS_						\
	    REFIID riid,					\
	    void** ppvObj					\
	);							\
	STDMETHOD_(ULONG32, AddRef)(THIS);			\
	STDMETHOD_(ULONG32, Release)(THIS);			\
    protected:							\
	STDMETHOD(_ActualQI)(REFIID riid, void** ppvObj);\
    public:	

#define DECLARE_UNKNOWN_NOCREATE(THIS_CLASS)				\
    public:							\
	STDMETHOD(QueryInterface)				\
	(							\
	    THIS_						\
	    REFIID riid,					\
	    void** ppvObj					\
	);							\
	STDMETHOD_(ULONG32, AddRef)(THIS);			\
	STDMETHOD_(ULONG32, Release)(THIS);			\
    protected:							\
	STDMETHOD(_ActualQI)(REFIID riid, void** ppvObj);\
    public:

#define BEGIN_INTERFACE_LIST(THIS_CLASS)				\
	IMPLEMENT_COM_CREATE_FUNCS(THIS_CLASS)				\
	STDMETHODIMP THIS_CLASS::QueryInterface				\
	(								\
	    THIS_							\
	    REFIID riid,						\
	    void** ppvObj						\
	)								\
	{return CUnknownIMP::QueryInterface(riid, ppvObj);}		\
	STDMETHODIMP_(ULONG32) THIS_CLASS::AddRef(THIS)			\
	{return CUnknownIMP::AddRef();}					\
	STDMETHODIMP_(ULONG32) THIS_CLASS::Release(THIS)		\
	{return CUnknownIMP::Release();}				\
	STDMETHODIMP THIS_CLASS::_ActualQI(REFIID riid, void** ppvObj)	\
	{								\
	    if (!ppvObj)						\
		return HXR_POINTER;					\
	    if (IsEqualIID(IID_IUnknown, riid))				\
	    {								\
		AddRef();						\
		*ppvObj = CUnknownIMP::GetUnknown();			\
		return HXR_OK;						\
	    }

#define BEGIN_INTERFACE_LIST_NOCREATE(THIS_CLASS)				\
	STDMETHODIMP THIS_CLASS::QueryInterface				\
	(								\
	    THIS_							\
	    REFIID riid,						\
	    void** ppvObj						\
	)								\
	{return CUnknownIMP::QueryInterface(riid, ppvObj);}		\
	STDMETHODIMP_(ULONG32) THIS_CLASS::AddRef(THIS)			\
	{return CUnknownIMP::AddRef();}					\
	STDMETHODIMP_(ULONG32) THIS_CLASS::Release(THIS)		\
	{return CUnknownIMP::Release();}				\
	STDMETHODIMP THIS_CLASS::_ActualQI(REFIID riid, void** ppvObj)	\
	{								\
	    if (!ppvObj)						\
		return HXR_POINTER;					\
	    if (IsEqualIID(IID_IUnknown, riid))				\
	    {								\
		AddRef();						\
		*ppvObj = CUnknownIMP::GetUnknown();			\
		return HXR_OK;						\
	    }

#define INTERFACE_LIST_ENTRY(INTERFACE_IID, INTERFACE_CLASS)	\
	    if (IsEqualIID(INTERFACE_IID, riid))		\
	    {							\
		AddRef();					\
		INTERFACE_CLASS* pThisAsInterfaceClass = this;  \
		*ppvObj = pThisAsInterfaceClass;		\
		return HXR_OK;					\
	    }

/*!
    @defined INTERFACE_LIST_ENTRY_BASE
    @discussion Specifies a base class whose query interface function should be called.
*/
#define INTERFACE_LIST_ENTRY_BASE( BASE_CLASS )				\
	if( SUCCEEDED( BASE_CLASS::_ActualQI( riid, ppvObj ) ) )	\
	{								\
	    return HXR_OK;						\
	}


#define INTERFACE_LIST_ENTRY2(DERIVED_CLASS, BASE_INTERFACE_IID, BASE_CLASS)	\
	    if (IsEqualIID(BASE_INTERFACE_IID, riid))		\
	    {							\
		AddRef();					\
		DERIVED_CLASS* pTemp1 = this;			\
		BASE_CLASS* pTemp2 = pTemp1;			\
		*ppvObj = pTemp2;				\
		return HXR_OK;					\
	    }

#define INTERFACE_LIST_ENTRY_DELEGATE_BLIND(DELEGATE_QI_FUNCTION)\
	    if( SUCCEEDED( DELEGATE_QI_FUNCTION( riid, ppvObj ) ) )\
	    {							\
		return HXR_OK;					\
	    }							\

#define INTERFACE_LIST_ENTRY_DELEGATE(INTERFACE_IID, DELEGATE_QI_FUNCTION)\
	    if(IsEqualIID(INTERFACE_IID, riid) &&		\
		SUCCEEDED( DELEGATE_QI_FUNCTION( riid, ppvObj ) ) )\
	    {							\
		return HXR_OK;					\
	    }

#define END_INTERFACE_LIST					\
	    *ppvObj = NULL;					\
	    return HXR_NOINTERFACE;				\
	}

/*!
    @defined END_INTERFACE_LIST_BASE
    @discussion Ends the list of supported interfaces.  Specifies the base class whose
    query interface function should be called.
*/
#define END_INTERFACE_LIST_BASE( BASE_CLASS )									\
	return BASE_CLASS::_ActualQI( riid, ppvObj );							\
    }                                                       							



#define DECLARE_COM_CREATE_FUNCS(CLASS)				\
    public:							\
	static CLASS* CreateObject();				\
	static HX_RESULT CreateObject(CLASS** ppObj);		\
	static HX_RESULT CreateInstance(IUnknown** ppvObj);	\
	static HX_RESULT CreateInstance				\
	(							\
	    IUnknown* pvOuter,					\
	    IUnknown** ppvObj					\
	);							\

#define IMPLEMENT_COM_CREATE_FUNCS(CLASS)			\
    HX_RESULT CLASS::CreateObject(CLASS** ppObj)		\
    {								\
	*ppObj = new CLASS;					\
	if (*ppObj)						\
	{							\
	    InterlockedIncrement(&((*ppObj)->m_lCount));	\
	    HX_RESULT pnrRes = (*ppObj)->FinalConstruct();	\
	    InterlockedDecrement(&((*ppObj)->m_lCount));	\
	    if (FAILED(pnrRes))					\
	    {							\
		delete (*ppObj);				\
		(*ppObj) = NULL;				\
		return pnrRes;					\
	    }							\
	    return HXR_OK;					\
	}							\
	return HXR_OUTOFMEMORY;		   			\
    }								\
    CLASS* CLASS::CreateObject()				\
    {								\
	CLASS* pNew = NULL;					\
	if (SUCCEEDED(CreateObject(&pNew)))			\
	{							\
	    return pNew;					\
	}							\
	return NULL;						\
    }								\
    HX_RESULT CLASS::CreateInstance				\
    (								\
	IUnknown* pvOuterObj,					\
	IUnknown** ppvObj					\
    )								\
    {								\
	if (!ppvObj)						\
	    return HXR_POINTER;					\
	*ppvObj = NULL;						\
	CLASS* pNew = NULL;					\
	HX_RESULT pnrRes = CreateObject(&pNew);			\
	if (SUCCEEDED(pnrRes) && pNew)				\
	{							\
	    pnrRes = pNew->SetupAggregation( pvOuterObj, ppvObj );	\
	}							\
	return pnrRes;						\
    }								\
    HX_RESULT CLASS::CreateInstance(IUnknown** ppvObj)		\
    {								\
	return CreateInstance(NULL, ppvObj);			\
    }								
    
    

/*!
    @defined IMPLEMENT_UNKNOWN_NOINTERFACE
    @discussion This fills in implementations for AddRef() and Release()--basically forwards
    calls onto CUnknownIMP.
*/
#define IMPLEMENT_UNKNOWN_NOINTERFACE( THIS_CLASS )										\
    STDMETHODIMP THIS_CLASS::QueryInterface( REFIID riid, void** ppvObj)                              \
    {                                                                                                           \
	return CUnknownIMP::QueryInterface( riid, ppvObj );                                                      \
    }														\
    STDMETHODIMP_(ULONG32) THIS_CLASS::AddRef(THIS) { return CUnknownIMP::AddRef(); }				\
    STDMETHODIMP_(ULONG32) THIS_CLASS::Release(THIS) { return CUnknownIMP::Release(); }      		        


/*!
    @defined INTERFACE_LIST_ENTRY_SIMPLE
    @discussion Simplified version of INTERFACE_LIST_ENTRY.  Only takes the interface
    name.  The IID is assumed to be the interface name with 'IID_' prepended.
*/
#define INTERFACE_LIST_ENTRY_SIMPLE( INTERFACE_CLASS )							\
	INTERFACE_LIST_ENTRY( IID_##INTERFACE_CLASS, INTERFACE_CLASS )                                        

/*!
    @defined INTERFACE_LIST_ENTRY_SIMPLE2
    @discussion This allows an interface to appear in an interface list 
      even when the conversion to it is ambiguous owing to multiple 
      inheritence. By specifying an intermediate interface the conversion 
      is disambiguated.
      This is the simplified version of INTERFACE_LIST_ENTRY2. Only takes 
      the interface names.  The IID are assumed to be the interface names 
      with 'IID_' prepended.
*/
#define INTERFACE_LIST_ENTRY_SIMPLE2( DERIVED_CLASS, BASE_CLASS )				\
	INTERFACE_LIST_ENTRY2( DERIVED_CLASS, IID_##BASE_CLASS, BASE_CLASS )                                        



/*!
    @defined INTERFACE_LIST_ENTRY_TESTPOINTER
*/
#define INTERFACE_LIST_ENTRY_MEMBER( INTERFACE_IID, MEMBER_VARIABLE )					\
	if( NULL != ( MEMBER_VARIABLE ) )								\
	{                                                                                               \
	    if( IsEqualIID( INTERFACE_IID, riid ) )                                                     \
	    {                                                                                           \
		if( SUCCEEDED( MEMBER_VARIABLE->QueryInterface( riid, ppvObj ) ) )                      \
		    return HXR_OK;                                                                      \
	    }                                                                                           \
	}                                                                                               \

/*!
    @defined INTERFACE_LIST_ENTRY_TESTPOINTER
*/
#define INTERFACE_LIST_ENTRY_MEMBER_BLIND( MEMBER_VARIABLE )						\
	if( NULL != ( MEMBER_VARIABLE ) )								\
	{                                                                                               \
	    if( SUCCEEDED( MEMBER_VARIABLE->QueryInterface( riid, ppvObj ) ) )                      	\
		return HXR_OK;                                                                      	\
	}                                                                                               \



#endif //!__CUnknownIMP_H__