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StaticAsyncCallback.h
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StaticAsyncCallback.h
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#ifndef __STATICASYNCCALLBACK__
#define __STATICASYNCCALLBACK__
////////////////////////////////////////////////////////
//
#define STATICASYNCCALLBACK(Callback, Parent) \
class Callback##AsyncCallback; \
friend class Callback##AsyncCallback; \
class Callback##AsyncCallback : public IMFAsyncCallback \
{ \
public: \
STDMETHOD_( ULONG, AddRef )() \
{ \
Parent * pThis = ((Parent*)((BYTE*)this - offsetof(Parent, m_x##Callback))); \
return pThis->AddRef(); \
} \
STDMETHOD_( ULONG, Release )() \
{ \
Parent * pThis = ((Parent*)((BYTE*)this - offsetof(Parent, m_x##Callback))); \
return pThis->Release(); \
} \
STDMETHOD( QueryInterface )( REFIID riid, __RPC__deref_out _Result_nullonfailure_ void **ppvObject ) \
{ \
return E_NOINTERFACE; \
} \
STDMETHOD( GetParameters )( \
__RPC__out DWORD *pdwFlags, \
__RPC__out DWORD *pdwQueue) \
{ \
return S_OK; \
} \
STDMETHOD( Invoke )( __RPC__in_opt IMFAsyncResult * pResult ) \
{ \
Callback( pResult ); \
return S_OK; \
} \
} m_x##Callback;
////////////////////////////////////////////////////////
//
//
// We need to support QI interface so that DCOM is happy when it tries to marshal the interface pointer
//
#define METHODASYNCCALLBACKEX(Callback, Parent, Flag, Queue) \
class Callback##AsyncCallback; \
friend class Callback##AsyncCallback; \
class Callback##AsyncCallback : public IMFAsyncCallback \
{ \
public: \
STDMETHOD_( ULONG, AddRef )() \
{ \
return GetParent()->AddRef(); \
} \
STDMETHOD_( ULONG, Release )() \
{ \
return GetParent()->Release(); \
} \
STDMETHOD( QueryInterface )( REFIID riid, __RPC__deref_out _Result_nullonfailure_ void **ppvObject ) \
{ \
if(riid == IID_IMFAsyncCallback || riid == IID_IUnknown) \
{ \
(*ppvObject) = this; \
AddRef(); \
return S_OK; \
} \
(*ppvObject) = NULL; \
return E_NOINTERFACE; \
} \
STDMETHOD( GetParameters )( \
__RPC__out DWORD *pdwFlags, \
__RPC__out DWORD *pdwQueue) \
{ \
*pdwFlags = Flag; \
*pdwQueue = Queue; \
return S_OK; \
} \
STDMETHOD( Invoke )( __RPC__in_opt IMFAsyncResult * pResult ) \
{ \
GetParent()->Callback( pResult ); \
return S_OK; \
} \
protected: \
Parent* GetParent() \
{ \
return ((Parent*)((BYTE*)this - offsetof(Parent, m_x##Callback))); \
} \
} m_x##Callback;
////////////////////////////////////////////////////////
//
#define METHODFASTCALLBACK(Callback, Parent) \
METHODASYNCCALLBACKEX(Callback, Parent, MFASYNC_FAST_IO_PROCESSING_CALLBACK, MFASYNC_CALLBACK_QUEUE_STANDARD)
#define METHODASYNCCALLBACK(Callback, Parent) \
METHODASYNCCALLBACKEX(Callback, Parent, 0, MFASYNC_CALLBACK_QUEUE_STANDARD)
#define METHODASYNCRTCALLBACK(Callback, Parent) \
METHODASYNCCALLBACKEX(Callback, Parent, 0, MFASYNC_CALLBACK_QUEUE_RT)
#define METHODASYNCIOCALLBACK(Callback, Parent) \
METHODASYNCCALLBACKEX(Callback, Parent, MFASYNC_FAST_IO_PROCESSING_CALLBACK, MFASYNC_CALLBACK_QUEUE_IO)
////////////////////////////////////////////////////////
//
#define METHODASYNCCALLBACKEX2(Callback, Parent, GetQueue ) \
METHODASYNCCALLBACKEX(Callback, Parent, \
0, \
GetParent()->GetQueue() )
#define METHODASYNCCALLBACKEX3(Callback, Parent, GetFlags, GetQueue ) \
METHODASYNCCALLBACKEX(Callback, Parent, \
GetParent()->GetFlags(), GetParent()->GetQueue() )
#endif