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