210 lines
4.8 KiB
C++
210 lines
4.8 KiB
C++
//***************************************************************************
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//
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// CLASSFAC.CPP
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//
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// Module: OLE MS SNMP PROPERTY PROVIDER
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//
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// Purpose: Contains the class factory. This creates objects when
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// connections are requested.
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//
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// Copyright (c) 1996-2001 Microsoft Corporation, All Rights Reserved
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//
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//***************************************************************************
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#include <windows.h>
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#include <snmptempl.h>
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#include <snmpmt.h>
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#include <objbase.h>
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#include <wbemidl.h>
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#include <wbemint.h>
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#include <snmpcont.h>
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#include <snmpevt.h>
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#include <snmpthrd.h>
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#include <snmplog.h>
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#include <instpath.h>
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#include "classfac.h"
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#include "trrtcomm.h"
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#include "trrtprov.h"
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#include "guids.h"
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LONG CFrameworkProviderClassFactory :: s_ObjectsInProgress = 0 ;
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LONG CFrameworkProviderClassFactory :: s_LocksInProgress = 0 ;
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//***************************************************************************
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//
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// CFrameworkProviderClassFactory::CFrameworkProviderClassFactory
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// CFrameworkProviderClassFactory::~CFrameworkProviderClassFactory
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//
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// Constructor Parameters:
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// None
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//***************************************************************************
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CFrameworkProviderClassFactory :: CFrameworkProviderClassFactory ()
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{
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m_ReferenceCount = 0 ;
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}
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CFrameworkProviderClassFactory::~CFrameworkProviderClassFactory ()
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{
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}
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//***************************************************************************
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//
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// CFrameworkProviderClassFactory::QueryInterface
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// CFrameworkProviderClassFactory::AddRef
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// CFrameworkProviderClassFactory::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 CFrameworkProviderClassFactory::QueryInterface (
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REFIID iid ,
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LPVOID FAR *iplpv
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)
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{
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*iplpv = NULL ;
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if ( iid == IID_IUnknown )
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{
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*iplpv = ( LPVOID ) this ;
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}
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else if ( iid == IID_IClassFactory )
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{
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*iplpv = ( LPVOID ) this ;
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}
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if ( *iplpv )
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{
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( ( LPUNKNOWN ) *iplpv )->AddRef () ;
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return ResultFromScode ( S_OK ) ;
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}
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else
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{
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return ResultFromScode ( E_NOINTERFACE ) ;
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}
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}
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STDMETHODIMP_( ULONG ) CFrameworkProviderClassFactory :: AddRef ()
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{
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return InterlockedIncrement ( & m_ReferenceCount ) ;
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}
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STDMETHODIMP_(ULONG) CFrameworkProviderClassFactory :: Release ()
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{
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LONG ref ;
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if ( ( ref = InterlockedDecrement ( & m_ReferenceCount ) ) == 0 )
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{
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delete this ;
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return 0 ;
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}
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else
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{
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return ref ;
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}
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}
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//***************************************************************************
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//
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// CFrameworkProviderClassFactory::CreateInstance
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//
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// Purpose: Instantiates a Provider object returning an interface pointer.
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//
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// Parameters:
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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 CFrameworkProviderClassFactory :: CreateInstance (
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LPUNKNOWN pUnkOuter ,
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REFIID riid ,
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LPVOID FAR * ppvObject
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)
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{
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HRESULT status = S_OK ;
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if ( pUnkOuter )
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{
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status = CLASS_E_NOAGGREGATION ;
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}
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else
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{
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IWbemServices *lpunk = ( IWbemServices * ) new CImpFrameworkProv ;
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if ( lpunk == NULL )
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{
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status = E_OUTOFMEMORY ;
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}
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else
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{
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status = lpunk->QueryInterface ( riid , ppvObject ) ;
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if ( FAILED ( status ) )
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{
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delete lpunk ;
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}
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else
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{
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}
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}
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}
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return status ;
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}
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//***************************************************************************
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//
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// CFrameworkProviderClassFactory::LockServer
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//
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// Purpose:
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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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// 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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// HRESULT NOERROR always.
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//***************************************************************************
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STDMETHODIMP CFrameworkProviderClassFactory :: LockServer ( BOOL fLock )
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{
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/*
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* Place code in critical section
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*/
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if ( fLock )
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{
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InterlockedIncrement ( & s_LocksInProgress ) ;
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}
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else
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{
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InterlockedDecrement ( & s_LocksInProgress ) ;
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}
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return S_OK ;
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} |