157 lines
3.6 KiB
C++
157 lines
3.6 KiB
C++
/*++
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Copyright (C) 1999-2001 Microsoft Corporation
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Module Name:
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Abstract:
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History:
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--*/
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//***************************************************************************
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//
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// CLocatorFactory::CLocatorFactory
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// CLocatorFactory::~CLocatorFactory
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//
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// Constructor Parameters:
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// None
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//***************************************************************************
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template<class TProvider>
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CLocatorFactory<TProvider>::CLocatorFactory()
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{
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m_cRef=0L;
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return;
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}
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template<class TProvider>
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CLocatorFactory<TProvider>::~CLocatorFactory(void)
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{
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return;
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}
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//***************************************************************************
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//
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// CLocatorFactory::QueryInterface
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// CLocatorFactory::AddRef
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// CLocatorFactory::Release
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//
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// Purpose: Standard Ole routines needed for all interfaces
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//
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//***************************************************************************
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template<class TProvider>
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STDMETHODIMP CLocatorFactory<TProvider>::QueryInterface(REFIID riid, PPVOID ppv)
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{
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*ppv=NULL;
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if (IID_IUnknown==riid || IID_IClassFactory==riid)
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*ppv=this;
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if (NULL!=*ppv)
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{
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((LPUNKNOWN)*ppv)->AddRef();
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return NOERROR;
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}
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return E_NOINTERFACE;
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}
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template<class TProvider>
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STDMETHODIMP_(ULONG) CLocatorFactory<TProvider>::AddRef(void)
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{
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return InterlockedIncrement(&m_cRef);;
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}
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template<class TProvider>
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STDMETHODIMP_(ULONG) CLocatorFactory<TProvider>::Release(void)
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{
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ULONG cRef = InterlockedDecrement(&m_cRef);
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if(cRef == 0)
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{
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delete this;
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}
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return cRef;
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}
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//***************************************************************************
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//
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// CLocatorFactory::CreateInstance
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//
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// Purpose: Instantiates a Locator object returning an interface pointer.
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//
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// Parameters:
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// pUnkOuter LPUNKNOWN to the controlling IUnknown if we are
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// being used in an aggregation.
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// riid REFIID identifying the interface the caller
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// desires to have for the new object.
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// ppvObj PPVOID in which to store the desired
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// interface pointer for the new object.
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//
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// Return Value:
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// HRESULT NOERROR if successful, otherwise E_NOINTERFACE
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// if we cannot support the requested interface.
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//***************************************************************************
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template<class TProvider>
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STDMETHODIMP CLocatorFactory<TProvider>::CreateInstance(LPUNKNOWN pUnkOuter
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, REFIID riid, PPVOID ppvObj)
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{
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IHmmLocator * pObj;
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HRESULT hr;
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*ppvObj=NULL;
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hr=E_OUTOFMEMORY;
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// This object doesnt support aggregation.
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if (NULL!=pUnkOuter)
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return CLASS_E_NOAGGREGATION;
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//Create the object passing function to notify on destruction.
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pObj=(IHmmLocator*)new CProviderLocator<TProvider>;
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if (NULL==pObj)
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return hr;
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hr=pObj->QueryInterface(riid, ppvObj);
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//Kill the object if initial creation or Init failed.
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if (FAILED(hr))
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delete pObj;
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return hr;
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}
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//***************************************************************************
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//
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// CLocatorFactory::LockServer
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//
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// Purpose:
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// Increments or decrements the lock count of the DLL. If the
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// lock count goes to zero and there are no objects, the DLL
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// is allowed to unload. See DllCanUnloadNow.
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//
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// Parameters:
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// fLock BOOL specifying whether to increment or
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// decrement the lock count.
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//
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// Return Value:
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// HRESULT NOERROR always.
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//***************************************************************************
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template<class TProvider>
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STDMETHODIMP CLocatorFactory<TProvider>::LockServer(BOOL fLock)
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{
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LockServer(fLock);
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return NOERROR;
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}
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