452 lines
11 KiB
C++
452 lines
11 KiB
C++
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1994
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//
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// File: classf.cxx
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//
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// Contents: Class factory for standard Filter Object class
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//
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// History: 6-Jan-1997 MarkZ 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 "docname.hxx"
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#include "classf.hxx"
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#include "filterob.hxx"
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#include <fsciclnt.h>
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#include <dslookup.hxx>
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//
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// We keep count of the number of filter objects that we've created
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// to let OLE know when this DLL is finally free.
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//
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extern long gulcInstances;
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// {aa205a4d-681F-11d0-A243-08002B36FCA4}
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extern "C" const GUID guidStorageFilterObject =
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{ 0xaa205a4d, 0x681f, 0x11d0, { 0xa2, 0x43, 0x8, 0x0, 0x2b, 0x36, 0xfc, 0xa4 } };
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extern "C" const GUID guidStorageDocStoreLocatorObject = CLSID_StorageDocStoreLocator;
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//+---------------------------------------------------------------------------
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//
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// Construction and destruction
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//
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//----------------------------------------------------------------------------
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageFilterObjectCF::CStorageFilterObjectCF
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//
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// Synopsis: Storage Filter Object class factory constructor
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//
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// History: 6-Jan-1997 MarkZ Created
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//
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//+-------------------------------------------------------------------------
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CStorageFilterObjectCF::CStorageFilterObjectCF()
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: _RefCount( 1 )
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{
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InterlockedIncrement( &gulcInstances );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageFilterObjectCF::~CStorageFilterObjectCF
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//
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// Synopsis: Storage Filter Object class factory destructor
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//
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// History: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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CStorageFilterObjectCF::~CStorageFilterObjectCF()
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{
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Win4Assert( _RefCount == 0);
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Win4Assert( gulcInstances != 0 );
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InterlockedDecrement( &gulcInstances );
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}
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//+---------------------------------------------------------------------------
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//
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// IUnknown method implementations
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//
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//----------------------------------------------------------------------------
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageFilterObjectCF::AddRef
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//
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// Synopsis: Increments refcount
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//
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// History: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE CStorageFilterObjectCF::AddRef()
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{
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return InterlockedIncrement( &_RefCount );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageFilterObjectCF::Release
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//
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// Synopsis: Decrement refcount. Delete if necessary.
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//
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// History: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE CStorageFilterObjectCF::Release()
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{
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Win4Assert( _RefCount != 0 );
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LONG RefCount = InterlockedDecrement( &_RefCount );
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if ( RefCount <= 0 )
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delete this;
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return (ULONG) RefCount;
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} // Release
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageFilterObjectCF::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: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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STDMETHODIMP CStorageFilterObjectCF::QueryInterface(
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REFIID riid,
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PVOID* ppvObject )
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{
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Win4Assert( 0 != ppvObject );
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if ( IID_IClassFactory == riid)
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*ppvObject = (PVOID) ((IClassFactory *) this );
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else if ( IID_IUnknown == riid )
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*ppvObject = (PVOID) ((IUnknown *) this );
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else
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{
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*ppvObject = 0;
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return E_NOINTERFACE;
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}
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AddRef();
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return S_OK;
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageFilterObjectCF::CreateInstance
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//
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// Synopsis: Create new CStorageFilterObject instance
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//
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// Arguments: [pUnkOuter] -- 'Outer' IUnknown; IGNORED
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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: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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STDMETHODIMP CStorageFilterObjectCF::CreateInstance(
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IUnknown * pUnkOuter,
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REFIID riid,
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PVOID * ppvObject )
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{
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CStorageFilterObject * pFilterObject = 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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//
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// Create the new object
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//
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pFilterObject = new CStorageFilterObject;
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//
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// Obtain the new interface
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//
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sc = pFilterObject->QueryInterface( riid , ppvObject );
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//
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// Regardless of whether the QueryInterface succeeded, we
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// release the object.
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//
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pFilterObject->Release();
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}
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CATCH(CException, e)
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{
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Win4Assert( 0 == pFilterObject );
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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: CStorageFilterObjectCF::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: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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STDMETHODIMP CStorageFilterObjectCF::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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// ======================== DocStoreLocator Class Factory ==================
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//
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageDocStoreLocatorObjectCF::CStorageDocStoreLocatorObjectCF
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//
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// Synopsis: Storage Filter Object class factory constructor
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//
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// History: 6-Jan-1997 MarkZ Created
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//
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//+-------------------------------------------------------------------------
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CStorageDocStoreLocatorObjectCF::CStorageDocStoreLocatorObjectCF()
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: _RefCount( 1 )
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{
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InterlockedIncrement( &gulcInstances );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageDocStoreLocatorObjectCF::~CStorageDocStoreLocatorObjectCF
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//
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// Synopsis: Storage Filter Object class factory destructor
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//
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// History: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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CStorageDocStoreLocatorObjectCF::~CStorageDocStoreLocatorObjectCF()
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{
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Win4Assert( _RefCount == 0);
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Win4Assert( gulcInstances != 0 );
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InterlockedDecrement( &gulcInstances );
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}
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//+---------------------------------------------------------------------------
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//
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// IUnknown method implementations
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//
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//----------------------------------------------------------------------------
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageDocStoreLocatorObjectCF::AddRef
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//
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// Synopsis: Increments refcount
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//
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// History: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE CStorageDocStoreLocatorObjectCF::AddRef()
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{
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return InterlockedIncrement( &_RefCount );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageDocStoreLocatorObjectCF::Release
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//
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// Synopsis: Decrement refcount. Delete if necessary.
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//
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// History: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE CStorageDocStoreLocatorObjectCF::Release()
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{
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Win4Assert( _RefCount != 0 );
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LONG RefCount = InterlockedDecrement( &_RefCount );
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if ( RefCount <= 0 )
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delete this;
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return (ULONG) RefCount;
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} // Release
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageDocStoreLocatorObjectCF::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: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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STDMETHODIMP CStorageDocStoreLocatorObjectCF::QueryInterface(
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REFIID riid,
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PVOID* ppvObject )
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{
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Win4Assert( 0 != ppvObject );
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if ( IID_IClassFactory == riid)
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*ppvObject = (PVOID) ((IClassFactory *) this );
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else if ( IID_IUnknown == riid )
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*ppvObject = (PVOID) ((IUnknown *) this );
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else
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{
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*ppvObject = 0;
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return E_NOINTERFACE;
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}
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AddRef();
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return S_OK;
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CStorageDocStoreLocatorObjectCF::CreateInstance
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//
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// Synopsis: Create new CStorageFilterObject instance
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//
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// Arguments: [pUnkOuter] -- 'Outer' IUnknown; IGNORED
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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: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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STDMETHODIMP CStorageDocStoreLocatorObjectCF::CreateInstance(
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IUnknown * pUnkOuter,
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REFIID riid,
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PVOID * ppvObject )
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{
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CClientDocStoreLocator * pObject = 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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//
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// Create the new object
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//
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pObject = new CClientDocStoreLocator;
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//
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// Obtain the new interface
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//
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sc = pObject->QueryInterface( riid , ppvObject );
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//
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// Regardless of whether the QueryInterface succeeded, we
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// release the object.
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//
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pObject->Release();
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}
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CATCH(CException, e)
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{
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Win4Assert( 0 == pObject );
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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: CStorageDocStoreLocatorObjectCF::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: 6-Jan-1997 MarkZ Created
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//
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//--------------------------------------------------------------------------
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STDMETHODIMP CStorageDocStoreLocatorObjectCF::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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