118 lines
2.8 KiB
C++
118 lines
2.8 KiB
C++
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/*****************************************************************************
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* stdunk.cpp - standard unknown implementation
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*****************************************************************************
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* Copyright (c) 1997-2000 Microsoft Corporation. All Rights Reserved.
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*
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*/
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#include "portcls.h"
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#include "stdunk.h"
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/*****************************************************************************
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* CUnknown implementation
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*/
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/*****************************************************************************
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* CUnknown::CUnknown()
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*****************************************************************************
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* Constructor.
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*/
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CUnknown::CUnknown(PUNKNOWN pUnknownOuter)
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: m_lRefCount(0)
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{
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if (pUnknownOuter)
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{
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m_pUnknownOuter = pUnknownOuter;
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}
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else
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{
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m_pUnknownOuter = PUNKNOWN(dynamic_cast<PNONDELEGATINGUNKNOWN>(this));
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}
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}
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/*****************************************************************************
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* CUnknown::~CUnknown()
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*****************************************************************************
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* Destructor.
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*/
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CUnknown::~CUnknown(void)
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{
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}
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/*****************************************************************************
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* INonDelegatingUnknown implementation
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*/
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/*****************************************************************************
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* CUnknown::NonDelegatingAddRef()
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*****************************************************************************
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* Register a new reference to the object without delegating to the outer
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* unknown.
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*/
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STDMETHODIMP_(ULONG) CUnknown::NonDelegatingAddRef(void)
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{
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ASSERT(m_lRefCount >= 0);
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InterlockedIncrement(&m_lRefCount);
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return ULONG(m_lRefCount);
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}
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/*****************************************************************************
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* CUnknown::NonDelegatingRelease()
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*****************************************************************************
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* Release a reference to the object without delegating to the outer unknown.
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*/
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STDMETHODIMP_(ULONG) CUnknown::NonDelegatingRelease(void)
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{
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ASSERT(m_lRefCount > 0);
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if (InterlockedDecrement(&m_lRefCount) == 0)
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{
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m_lRefCount++;
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delete this;
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return 0;
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}
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return ULONG(m_lRefCount);
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}
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/*****************************************************************************
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* CUnknown::NonDelegatingQueryInterface()
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*****************************************************************************
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* Obtains an interface.
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*/
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STDMETHODIMP_(NTSTATUS) CUnknown::NonDelegatingQueryInterface
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(
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REFIID rIID,
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PVOID * ppVoid
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)
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{
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ASSERT(ppVoid);
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if (IsEqualGUIDAligned(rIID,IID_IUnknown))
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{
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*ppVoid = PVOID(PUNKNOWN(this));
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}
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else
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{
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*ppVoid = NULL;
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}
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if (*ppVoid)
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{
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PUNKNOWN(*ppVoid)->AddRef();
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return STATUS_SUCCESS;
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}
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return STATUS_INVALID_PARAMETER;
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}
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