95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
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//***************************************************************************
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//
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// PROVIDER.CPP
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//
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// Module: HEALTHMON SERVER AGENT
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//
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// Purpose: Event consumer provider class implementation
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//
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// Copyright (c)1999 Microsoft Corporation, All Rights Reserved
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//
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//***************************************************************************
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#include "stdafx.h"
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#include "Provider.h"
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#include "Consumer.h"
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#include <objbase.h>
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CProvider::CProvider()
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{
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m_cRef = 0L;
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}
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CProvider::~CProvider()
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{
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}
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STDMETHODIMP CProvider::QueryInterface(REFIID riid, LPVOID FAR *ppv)
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{
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*ppv=NULL;
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if (riid == IID_IUnknown || riid == IID_IWbemEventConsumerProvider)
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{
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*ppv=this;
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}
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if (*ppv != NULL)
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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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STDMETHODIMP_(ULONG) CProvider::AddRef(void)
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{
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return InterlockedIncrement((long*)&m_cRef);
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}
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STDMETHODIMP_(ULONG) CProvider::Release(void)
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{
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LONG lCount = InterlockedDecrement((long*)&m_cRef);
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if (lCount != 0L)
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{
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return lCount;
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}
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delete this;
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return 0L;
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}
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STDMETHODIMP CProvider::Initialize(LPWSTR wszUser, LONG lFlags,
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LPWSTR wszNamespace, LPWSTR wszLocale,
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IWbemServices __RPC_FAR *pNamespace,
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IWbemContext __RPC_FAR *pCtx,
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IWbemProviderInitSink __RPC_FAR *pInitSink)
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{
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// Tell CIMOM that we are initialized
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pInitSink->SetStatus(WBEM_S_INITIALIZED, 0);
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return WBEM_S_NO_ERROR;
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}
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//-----------------------------------------------------------
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STDMETHODIMP CProvider::FindConsumer(
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IWbemClassObject* pLogicalConsumer,
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IWbemUnboundObjectSink** ppConsumer)
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{
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// Singleton Consumer.
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static CConsumer Consumer;
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// return Consumer.QueryInterface(IID_IWbemUnboundObjectSink, (void**)ppConsumer);
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Consumer.QueryInterface(IID_IWbemUnboundObjectSink, (void**)ppConsumer);
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// WMI says: It is much more scalable to support IWbemEventConsumerProvider
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// interface. In fact, it's even more scalable (M3-only feature!) to return
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// S_FALSE from the call to FindConsumer --- in that case we will use NULL
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// for the logical consumer pointer in the IndicateToConsumer call.
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// By returning S_FALSE you are saying: "I have extracted all the information
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// I need from the logical consumer instance and don't care to see it again."
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// This way, we don't have to keep it in memory.
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return S_FALSE;
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}
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