291 lines
7.2 KiB
C++
291 lines
7.2 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1996-1998
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//
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// File: ClassFac.cxx
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//
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// Contents: Class factory for admin COM object
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//
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// History: 26-Nov-1996 KyleP Created
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//
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//--------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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#include <classid.hxx>
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#include <classfac.hxx>
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#include <snapin.hxx>
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//
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// Global variables
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//
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long gulcInstances = 0;
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//+-------------------------------------------------------------------------
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//
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// Method: CCIAdminCF::CCIAdminCF
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//
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// Synopsis: CI MMC snap-in class factory constructor
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//
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// History: 26-Nov-1996 KyleP Created
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//
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//--------------------------------------------------------------------------
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CCIAdminCF::CCIAdminCF()
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{
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_uRefs = 1;
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InterlockedIncrement( &gulcInstances );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CCIAdminCF::~CCIAdminCF
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//
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// Synopsis: Text IFilter class factory constructor
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//
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// History: 26-Nov-1996 KyleP Created
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// History: 23-Feb-1994 KyleP Created
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//
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//--------------------------------------------------------------------------
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CCIAdminCF::~CCIAdminCF()
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{
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InterlockedDecrement( &gulcInstances );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CCIAdminCF::QueryInterface
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//
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// Synopsis: Rebind to other interface
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//
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// Arguments: [riid] -- IID of new interface
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// [ppvObject] -- New interface * returned here
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//
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// Returns: S_OK if bind succeeded, E_NOINTERFACE if bind failed
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//
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// History: 26-Nov-1996 KyleP Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE CCIAdminCF::QueryInterface( REFIID riid,
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void ** ppvObject )
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{
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SCODE sc = S_OK;
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if ( 0 == ppvObject )
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return E_INVALIDARG;
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if ( IID_IClassFactory == riid )
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*ppvObject = (IUnknown *)(IClassFactory *)this;
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else if ( IID_IUnknown == riid )
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*ppvObject = (IUnknown *)(IClassFactory *)this;
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else
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sc = E_NOINTERFACE;
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if ( SUCCEEDED( sc ) )
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AddRef();
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return sc;
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} //QueryInterface
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//+-------------------------------------------------------------------------
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//
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// Method: CCIAdminCF::AddRef
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//
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// Synopsis: Increments refcount
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//
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// History: 23-Feb-1994 KyleP Created
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// History: 26-Nov-1996 KyleP Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE CCIAdminCF::AddRef()
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{
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return InterlockedIncrement( &_uRefs );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CCIAdminCF::Release
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//
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// Synopsis: Decrement refcount. Delete if necessary.
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//
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// History: 23-Feb-1994 KyleP Created
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// History: 26-Nov-1996 KyleP Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE CCIAdminCF::Release()
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{
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unsigned long uTmp = InterlockedDecrement( &_uRefs );
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if ( 0 == uTmp )
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delete this;
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return uTmp;
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CCIAdminCF::CreateInstance
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//
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// Synopsis: Creates new snapin data object
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//
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// Arguments: [pUnkOuter] -- 'Outer' IUnknown
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// [riid] -- Interface to bind
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// [ppvObject] -- Interface returned here
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//
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// History: 26-Nov-1996 KyleP Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE CCIAdminCF::CreateInstance( IUnknown * pUnkOuter,
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REFIID riid,
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void * * ppvObject )
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{
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IUnknown * pIUnk = 0;
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SCODE sc = S_OK;
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TRANSLATE_EXCEPTIONS;
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TRY
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{
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pIUnk = (IUnknown *)(IComponent *)new CCISnapinData();
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sc = pIUnk->QueryInterface( riid , ppvObject );
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if( SUCCEEDED(sc) )
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pIUnk->Release(); // Release extra refcount from QueryInterface
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}
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CATCH(CException, e)
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{
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Win4Assert( 0 == pIUnk );
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switch( e.GetErrorCode() )
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{
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case E_OUTOFMEMORY:
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sc = (E_OUTOFMEMORY);
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break;
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default:
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sc = (E_UNEXPECTED);
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}
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}
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END_CATCH;
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UNTRANSLATE_EXCEPTIONS;
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return (sc);
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CCIAdminCF::LockServer
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//
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// Synopsis: Force class factory to remain loaded
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//
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// Arguments: [fLock] -- TRUE if locking, FALSE if unlocking
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//
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// Returns: S_OK
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//
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// History: 23-Feb-1994 KyleP Created
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// History: 26-Nov-1996 KyleP Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE CCIAdminCF::LockServer(BOOL fLock)
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{
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if(fLock)
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InterlockedIncrement( &gulcInstances );
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else
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InterlockedDecrement( &gulcInstances );
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return S_OK;
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}
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//+-------------------------------------------------------------------------
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//
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// Function: DllGetClassObject
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//
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// Synopsis: Ole DLL load class routine
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//
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// Arguments: [cid] -- Class to load
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// [iid] -- Interface to bind to on class object
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// [ppvObj] -- Interface pointer returned here
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//
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// Returns: Text filter class factory
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//
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// History: 23-Feb-1994 KyleP Created
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// History: 26-Nov-1996 KyleP Created
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//
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//--------------------------------------------------------------------------
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extern "C" SCODE STDMETHODCALLTYPE DllGetClassObject( REFCLSID cid,
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REFIID iid,
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void ** ppvObj )
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{
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IUnknown * pResult = 0;
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SCODE sc = S_OK;
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TRANSLATE_EXCEPTIONS;
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TRY
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{
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if ( guidCISnapin == cid )
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pResult = (IUnknown *)new CCIAdminCF;
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else
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sc = E_NOINTERFACE;
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if( pResult )
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{
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sc = pResult->QueryInterface( iid, ppvObj );
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pResult->Release(); // Release extra refcount from QueryInterface
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}
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}
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CATCH(CException, e)
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{
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if ( pResult )
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pResult->Release();
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switch( e.GetErrorCode() )
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{
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case E_OUTOFMEMORY:
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sc = (E_OUTOFMEMORY);
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break;
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default:
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sc = (E_UNEXPECTED);
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}
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}
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END_CATCH;
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UNTRANSLATE_EXCEPTIONS;
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return sc;
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}
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//+-------------------------------------------------------------------------
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//
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// Method: DllCanUnloadNow
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//
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// Synopsis: Notifies DLL to unload (cleanup global resources)
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//
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// Returns: S_OK if it is acceptable for caller to unload DLL.
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//
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// History: 23-Feb-1994 KyleP Created
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// History: 26-Nov-1996 KyleP Created
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//
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//--------------------------------------------------------------------------
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extern "C" SCODE STDMETHODCALLTYPE DllCanUnloadNow( void )
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{
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if ( 0 == gulcInstances )
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return( S_OK );
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else
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return( S_FALSE );
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}
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