133 lines
2.5 KiB
C++
133 lines
2.5 KiB
C++
//***************************************************************************
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//
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// Copyright (c) 1997-1999 Microsoft Corporation
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//
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// File: factory.cpp
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//
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// Description :
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// Class factory implementation for the command-line event
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// consumer provider
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//
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// History:
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//
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//***************************************************************************
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#include "stdafx.h"
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#include "factory.h"
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#include "Provider.h"
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CProviderFactory::CProviderFactory(CListBox *pOutputList)
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{
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m_cRef = 0L;
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m_pOutputList = pOutputList;
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}
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CProviderFactory::~CProviderFactory()
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{
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}
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//IUnknown methods
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STDMETHODIMP CProviderFactory::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_IClassFactory)
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*ppv=this;
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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) CProviderFactory::AddRef(void)
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{
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return InterlockedIncrement(&m_cRef);
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}
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STDMETHODIMP_(ULONG) CProviderFactory::Release(void)
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{
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int lNewRef = InterlockedDecrement(&m_cRef);
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if(lNewRef == 0)
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{
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delete this;
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}
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return lNewRef;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CProviderFactory::CreateInstance
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//
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// Synopsis:
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//
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// Arguments: [pUnkOuter]
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// [iid]
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// [ppv]
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//
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// Returns: HRESULT
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//
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// Modifies:
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP
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CProviderFactory::CreateInstance(IUnknown *pUnkOuter, REFIID riid, LPVOID *ppv)
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{
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HRESULT hr;
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CProvider *pProvider = NULL;
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if (pUnkOuter)
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return E_FAIL;
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// create the provider.
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pProvider = new CProvider(m_pOutputList);
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if (pProvider == NULL)
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{
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return E_FAIL;
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}
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// get the interface asked for.
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if (pProvider)
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{
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hr = pProvider->QueryInterface(riid, ppv);
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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_OUTOFMEMORY;
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}
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return NOERROR;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CProviderFactory::LockServer
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//
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// Synopsis:
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//
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// Arguments: [fLock]
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//
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// Returns: HRESULT
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//
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// Modifies:
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP CProviderFactory::LockServer(BOOL fLock)
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{
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if (fLock)
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m_cRef++;
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else
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m_cRef--;
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return NOERROR;
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}
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