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54 lines
855 B
54 lines
855 B
// Copyright (c) 1999 Microsoft Corporation. All rights reserved.
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//
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// Helper classes for implementing IUnknown.
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//
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#include "stdinc.h"
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#include "unkhelp.h"
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#include "dll.h"
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ComRefCount::ComRefCount()
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: m_cRef(1)
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{
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LockModule(true);
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}
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STDMETHODIMP_(ULONG)
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ComRefCount::AddRef()
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{
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return InterlockedIncrement(&m_cRef);
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}
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STDMETHODIMP_(ULONG)
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ComRefCount::Release()
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{
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if (!InterlockedDecrement(&m_cRef))
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{
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delete this;
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LockModule(false);
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return 0;
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}
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return m_cRef;
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}
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STDMETHODIMP
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ComSingleInterface::QueryInterface(const IID &iid, void **ppv, const IID&iidExpected, void *pvInterface)
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{
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V_INAME(ComSingleInterface::QueryInterface);
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V_PTRPTR_WRITE(ppv);
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V_REFGUID(iid);
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if (iid == IID_IUnknown || iid == iidExpected)
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{
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*ppv = pvInterface;
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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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this->AddRef();
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return S_OK;
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}
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