COM IClassFactory接口封装

CAbstractClassFactory.h

#include <objbase.h>#include <unknwn.h>#define DECLARE_IUNKNOWN_INTERFACE\public:\virtual HRESULT _stdcall QueryInterface(const IID& riid,void** ppvObject);\virtual ULONG _stdcall AddRef ();\virtual ULONG _stdcall Release();class CAbstractClassFactory:public IClassFactory{public:CAbstractClassFactory();DECLARE_IUNKNOWN_INTERFACEvirtual HRESULT _stdcall CreateInstance(IUnknown *pUnkOuter,const IID& riid,void** ppvObject)=0;    virtual HRESULT _stdcall LockServer(BOOL fLock);long m_caref,g_caref;};const CLSID CLSID_CAbstractClassFactory = {0x59F6C62A,0x50BE,0x4687,{0x95,0x80,0x59,0xC4,0x8F,0x94,0xE5,0xD8}};

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CAbstractClassFactory.cpp

#include "CAbstractClassFactory.h"CAbstractClassFactory::CAbstractClassFactory(){m_caref=1;g_caref=1;}HRESULT _stdcall CAbstractClassFactory::QueryInterface(const IID& riid,void** ppvObject){if(riid==IID_IUnknown||riid==IID_IClassFactory){*ppvObject=static_cast<IClassFactory*>(this);}else{*ppvObject=NULL;return E_NOINTERFACE;}return S_OK;}ULONG _stdcall CAbstractClassFactory::AddRef(){return InterlockedIncrement(&m_caref);}ULONG _stdcall CAbstractClassFactory::Release(){if(InterlockedDecrement(&m_caref)==0){delete this;return 0;}return m_caref;}HRESULT _stdcall CAbstractClassFactory::LockServer(BOOL fLock){if(fLock){InterlockedIncrement(&g_caref);}else{InterlockedDecrement(&g_caref);}return S_OK;}

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