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#pragma once
#include "RefCounter.hpp"
#include "../comLightCommon.h"
#include "../utils/typeTraits.hpp"
namespace ComLight
{
// Base class of objects, implements reference counting, also a few lifetime methods.
// The template argument is the interface you want clients to get when they ask for IID_IUnknown. By convention, that pointer defines object's identity.
template<class I>
class ObjectRoot : public RefCounter, public I
{
protected:
inline HRESULT internalFinalConstruct()
{
return S_FALSE;
}
inline HRESULT FinalConstruct()
{
return S_FALSE;
}
inline void FinalRelease() { }
IUnknown* getUnknown()
{
static_assert( details::pointersAssignable<IUnknown, I>(), "The interface doesn't derive from IUnknown" );
return static_cast<I*>( this );
}
bool queryExtraInterfaces( REFIID riid, void **ppvObject ) const
{
return false;
}
// Implement query interface with 2 entries, IUnknown and I.
bool implQueryInterface( REFIID riid, void** ppvObject )
{
if( riid == I::iid() || riid == IUnknown::iid() )
{
I* const result = this;
result->AddRef();
*ppvObject = result;
return true;
}
return false;
}
};
}
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