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// 
// Cmpnt3.cpp 
// To compile, use: cl /LD Cmpnt3.cpp GUIDs.cpp UUID.lib Cmpnt3.def 
// 
#include  
#include  
 
#include "Iface.h" 
 
void trace(const char* msg) { cout << "Component 3:\t" << msg << endl ;} 
 
// 
// Component 
// 
class CA : public IX, 
           public IY, 
           public IZ 
{ 
	// IUnknown implementation 
	virtual HRESULT __stdcall QueryInterface(const IID& iid, void** ppv) ;			 
	virtual ULONG __stdcall AddRef() ; 
	virtual ULONG __stdcall Release() ; 
 
	// Interface IX implementation 
	virtual void __stdcall Fx() { cout << "Fx" << endl ;} 
 
	// Interface IY implementation 
	virtual void __stdcall Fy() { cout << "Fy" << endl ;} 
 
	// Interface IZ implementation 
	virtual void __stdcall Fz() { cout << "Fz" << endl ;} 
 
public: 
	// Constructor 
	CA() : m_cRef(0) {} 
 
	// Destructor 
	~CA() { trace("Destroy self.") ;} 
 
private: 
	long m_cRef ; 
} ; 
 
HRESULT __stdcall CA::QueryInterface(const IID& iid, void** ppv) 
{ 	 
	if (iid == IID_IUnknown) 
	{ 
		trace("Return pointer to IUnknown.") ; 
		*ppv = static_cast(this) ; 
	}  
	else if (iid == IID_IX) 
	{ 
		trace("Return pointer to IX.") ; 
		*ppv = static_cast(this) ; 
	} 
	else if (iid == IID_IY) 
	{ 
		trace("Return pointer to IY.") ; 
		*ppv = static_cast(this) ; 
	} 
	else if (iid == IID_IZ) 
	{ 
		trace("Return pointer to IZ.") ; 
		*ppv = static_cast(this) ; 
	} 
	else 
	{  	    
		trace("Interface not supported.") ; 
		*ppv = NULL ; 
		return E_NOINTERFACE ; 
	} 
	reinterpret_cast(*ppv)->AddRef() ;  
	return S_OK ; 
} 
 
ULONG __stdcall CA::AddRef() 
{ 
	return InterlockedIncrement(&m_cRef) ; 
} 
 
ULONG __stdcall CA::Release()  
{ 
	if (InterlockedDecrement(&m_cRef) == 0) 
	{ 
		delete this ; 
		return 0 ; 
	} 
	return m_cRef ; 
 
} 
 
// 
// Creation function 
// 
extern "C" IUnknown* CreateInstance() 
{ 
	IUnknown* pI = static_cast(new CA) ; 
	pI->AddRef() ; 
	return pI ; 
}