//===============================================================================================
// FUNCTION: QueryInterface
// PURPOSE: This method returns a reference to the request interface, if it exists.
//
BOOL CUnknown::QueryInterface(REFIID riid, CUnknown *pUnknown)
{
MEMBERASSERT();
WPTRASSERT(pUnknown);
ASSERT(m_pInterface!=NULL);
// Clear the interface in the return object in case of failure.
pUnknown->SetInterface(NULL);
// Query for the interface.
void *pInterface = NULL;
if (!_QueryInterface(riid, &pInterface))
return FALSE;
// Set the return value.
pUnknown->SetInterface(PUNKNOWN(pInterface));
return TRUE;
}
HResult _Chain(void *pThis, void* pChain, SCOM_RIID riid, void **ppv)
{
_CHAINDATA* pcd = static_cast<_CHAINDATA*>(pChain);
void* p = (void*)((unsigned long)pThis + pcd->dwOffset);
return _QueryInterface(p, pcd->pFunc(), riid, ppv);
}