115 lines
2.9 KiB
C++
115 lines
2.9 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1992.
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//
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// File: cqi.cxx
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//
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// Contents: implementations for QueryInterface test
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//
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// Functions:
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// CQI::CQI
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// CQI::~CQI
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// CQI::QueryInterface
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//
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// History: 06-Aug-92 Rickhi Created
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//
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//--------------------------------------------------------------------------
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#include <headers.cxx>
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#pragma hdrstop
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#include <cqisrv.hxx> // class definition
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//+-------------------------------------------------------------------------
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//
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// Method: CQI::CQI
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//
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// Synopsis: Creates an instance of CQI
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//
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// History: 06-Aug-92 Rickhi Created
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//
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//--------------------------------------------------------------------------
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CQI::CQI(void) : _cRefs(1)
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{
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}
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CQI::~CQI(void)
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{
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// automatic actions are enough
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CQI::AddRef/Release
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//
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// Synopsis: track reference counts
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//
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// History: 06-Aug-92 Rickhi Created
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//
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//--------------------------------------------------------------------------
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STDMETHODIMP_(ULONG) CQI::AddRef(void)
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{
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InterlockedIncrement((LONG *)&_cRefs);
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return _cRefs;
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}
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STDMETHODIMP_(ULONG) CQI::Release(void)
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{
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if (InterlockedDecrement((LONG *)&_cRefs) == 0)
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{
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delete this;
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return 0;
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}
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return _cRefs;
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CQI::QueryInterface
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//
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// Synopsis: returns ptr to requested interface.
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//
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// DANGER: this returns SUCCESS on almost every interface,
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// though the only valid methods on any interface are IUnknown.
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//
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// Arguments: [riid] - interface instance requested
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// [ppv] - where to put pointer to interface instance
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//
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// Returns: S_OK or E_NOINTERFACE
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//
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// History: 06-Aug-92 Rickhi Created
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//
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//--------------------------------------------------------------------------
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STDMETHODIMP CQI::QueryInterface(REFIID riid, void **ppv)
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{
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// the interface cant be one of these or marshalling will fail.
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if (IsEqualIID(riid,IID_IUnknown) ||
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IsEqualIID(riid,IID_IAdviseSink) ||
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IsEqualIID(riid,IID_IDataObject) ||
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IsEqualIID(riid,IID_IOleObject) ||
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IsEqualIID(riid,IID_IOleClientSite) ||
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IsEqualIID(riid,IID_IParseDisplayName) ||
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IsEqualIID(riid,IID_IPersistStorage) ||
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IsEqualIID(riid,IID_IPersistFile) ||
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IsEqualIID(riid,IID_IStorage) ||
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IsEqualIID(riid,IID_IOleContainer) ||
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IsEqualIID(riid,IID_IOleItemContainer) ||
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IsEqualIID(riid,IID_IOleInPlaceSite) ||
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IsEqualIID(riid,IID_IOleInPlaceActiveObject) ||
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IsEqualIID(riid,IID_IOleInPlaceObject) ||
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IsEqualIID(riid,IID_IOleInPlaceUIWindow) ||
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IsEqualIID(riid,IID_IOleInPlaceFrame) ||
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IsEqualIID(riid,IID_IOleWindow))
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{
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*ppv = (void *)(IUnknown *) this;
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AddRef();
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return S_OK;
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}
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else
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{
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*ppv = NULL;
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return E_NOINTERFACE;
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}
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}
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