unknownbase.h

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#ifndef APITESTS_UNKNOWNBASE_H
#define APITESTS_UNKNOWNBASE_H
 
template<typename Interface>
class CUnknownBase : public Interface
{
    LONG m_lRef;
    bool m_AutoDelete;
protected:
    virtual const QITAB* GetQITab() = 0;
public:
 
    CUnknownBase(bool autoDelete = true, LONG initialRef = 0)
        : m_lRef(initialRef),
        m_AutoDelete(autoDelete)
    {
    }
 
   ULONG STDMETHODCALLTYPE AddRef ()
   {
       return InterlockedIncrement( &m_lRef );
   }
 
   ULONG STDMETHODCALLTYPE Release()
   {
       long newref = InterlockedDecrement( &m_lRef );
       if (m_AutoDelete && newref<=0)
       {
           delete this;
       }
       return newref;
   }
 
    HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppv)
    {
        return QISearch(this, GetQITab(), riid, ppv);
    }
 
    virtual ~CUnknownBase() {}
 
    LONG GetRef() const
    {
        return m_lRef;
    }
};
 
#endif // APITESTS_UNKNOWNBASE_H