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172 lines
4.1 KiB
172 lines
4.1 KiB
//***************************************************************************
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//
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// (c) 1998 by Microsoft Corporation
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//
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// CLASSFAC.CPP
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//
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// alanbos 23-Feb-99 Created.
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//
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// Contains the class factory.
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//
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//***************************************************************************
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#include "precomp.h"
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//***************************************************************************
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//
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// CWmiScriptingHostFactory::CWmiScriptingHostFactory
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//
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// DESCRIPTION:
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//
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// Constructor
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//
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//***************************************************************************
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CWmiScriptingHostFactory::CWmiScriptingHostFactory(void)
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{
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m_cRef=0L;
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return;
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}
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//***************************************************************************
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//
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// CWmiScriptingHostFactory::~CWmiScriptingHostFactory
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//
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// DESCRIPTION:
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//
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// Destructor
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//
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//***************************************************************************
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CWmiScriptingHostFactory::~CWmiScriptingHostFactory(void)
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{
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return;
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}
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//***************************************************************************
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//
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// CWmiScriptingHostFactory::QueryInterface
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// CWmiScriptingHostFactory::AddRef
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// CWmiScriptingHostFactory::Release
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//
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// Purpose: Standard Ole routines needed for all interfaces
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//
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//***************************************************************************
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STDMETHODIMP CWmiScriptingHostFactory::QueryInterface(REFIID riid
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, LPVOID *ppv)
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{
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*ppv=NULL;
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if (IID_IUnknown==riid || IID_IClassFactory==riid)
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*ppv=this;
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if (NULL!=*ppv)
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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 ResultFromScode(E_NOINTERFACE);
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}
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STDMETHODIMP_(ULONG) CWmiScriptingHostFactory::AddRef(void)
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{
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InterlockedIncrement(&m_cRef);
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return m_cRef;
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}
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STDMETHODIMP_(ULONG) CWmiScriptingHostFactory::Release(void)
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{
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InterlockedDecrement(&m_cRef);
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if (0L!=m_cRef)
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return m_cRef;
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delete this;
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return 0L;
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}
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//***************************************************************************
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//
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// SCODE CWmiScriptingHostFactory::CreateInstance
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//
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// Description:
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//
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// Instantiates a WMI Scripting Host.
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//
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// Parameters:
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//
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// pUnkOuter LPUNKNOWN to the controlling IUnknown if we are
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// being used in an aggregation.
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// riid REFIID identifying the interface the caller
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// desires to have for the new object.
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// ppvObj PPVOID in which to store the desired
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// interface pointer for the new object.
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//
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// Return Value:
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// HRESULT NOERROR if successful, otherwise E_NOINTERFACE
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// if we cannot support the requested interface.
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//***************************************************************************
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STDMETHODIMP CWmiScriptingHostFactory::CreateInstance (
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IN LPUNKNOWN pUnkOuter,
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IN REFIID riid,
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OUT PPVOID ppvObj
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)
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{
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IUnknown * pObj = NULL;
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HRESULT hr = E_FAIL;
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*ppvObj=NULL;
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// This object doesnt support aggregation.
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if (NULL!=pUnkOuter)
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return CLASS_E_NOAGGREGATION;
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pObj = new CWmiScriptingHost;
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if (NULL == pObj)
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return E_OUTOFMEMORY;
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if (FAILED (hr = pObj->QueryInterface(riid, ppvObj)))
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delete pObj;
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return hr;
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}
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//***************************************************************************
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//
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// SCODE CWmiScriptingHostFactory::LockServer
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//
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// Description:
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//
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// Increments or decrements the lock count of the DLL. If the
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// lock count goes to zero and there are no objects, the DLL
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// is allowed to unload. See DllCanUnloadNow.
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//
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// Parameters:
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//
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// fLock BOOL specifying whether to increment or
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// decrement the lock count.
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//
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// Return Value:
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//
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// HRESULT NOERROR always.
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//***************************************************************************
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STDMETHODIMP CWmiScriptingHostFactory::LockServer(IN BOOL fLock)
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{
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if (fLock)
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InterlockedIncrement((long *)&g_cLock);
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else
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InterlockedDecrement((long *)&g_cLock);
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return NOERROR;
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}
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