209 lines
4.7 KiB
C++
209 lines
4.7 KiB
C++
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1997.
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//
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// File: Clsfact.cpp
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//
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// Contents: Class Factory
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//
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// Classes: CClassFactory
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//
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// Notes:
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//
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// History: 05-Nov-97 rogerg Created.
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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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// Member: CClassFactory::CClassFactory, public
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//
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// Synopsis: Constructor
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//
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// Arguments:
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//
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// Returns:
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//
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// Modifies:
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//
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// History: 05-Nov-97 rogerg Created.
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//
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//----------------------------------------------------------------------------
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CClassFactory::CClassFactory()
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{
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m_cRef = 1;
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return;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CClassFactory::~CClassFactory, public
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//
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// Synopsis: Destructor
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//
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// Arguments:
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//
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// Returns:
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//
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// Modifies:
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//
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// History: 05-Nov-97 rogerg Created.
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//
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//----------------------------------------------------------------------------
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CClassFactory::~CClassFactory( void )
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{
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Assert(0 == m_cRef);
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return;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CClassFactory::QueryInterface, public
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//
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// Synopsis: Standard QueryInterface
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//
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// Arguments: [iid] - Interface ID
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// [ppvObj] - Object return
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//
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// Returns: Appropriate status code
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//
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// Modifies: [ppvObj]
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//
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// History: 05-Nov-97 rogerg Created.
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP CClassFactory::QueryInterface( REFIID riid, LPVOID* ppv )
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{
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*ppv = NULL;
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if( IsEqualIID( riid, IID_IUnknown ) || IsEqualIID( riid, IID_IClassFactory ) )
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{
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*ppv = (LPVOID)this;
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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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//+---------------------------------------------------------------------------
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//
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// Member: CClassFactory::AddRef, public
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//
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// Synopsis: Add reference
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//
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// History: 05-Nov-97 rogerg Created.
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP_(ULONG) CClassFactory::AddRef()
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{
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ULONG cRefs;
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cRefs = InterlockedIncrement((LONG *)& m_cRef);
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return cRefs;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CClasFactory::Release, public
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//
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// Synopsis: Release reference
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//
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// History: 05-Nov-97 rogerg Created.
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP_(ULONG) CClassFactory::Release()
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{
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ULONG cRefs;
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cRefs = InterlockedDecrement( (LONG *) &m_cRef);
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if (0 == cRefs)
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{
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delete this;
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}
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return cRefs;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CClassFactory::CreateInstance, public
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//
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// Synopsis: Creates and instance of the requested object
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//
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// Arguments: [pUnkOuter] - Controlling unknown
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// [riid] - Requested interface
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// [ppvObj] - object pointer
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//
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// Returns: Appropriate status code
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//
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// Modifies:
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//
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// History: 05-Nov-97 rogerg Created.
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP CClassFactory::CreateInstance( LPUNKNOWN pUnkOuter, REFIID riid, LPVOID FAR *ppvObj )
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{
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HRESULT hr = E_OUTOFMEMORY;
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CSynchronizeInvoke *pNewSynchronizeInstance;
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*ppvObj = NULL;
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// We don't support aggregation at all.
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if( pUnkOuter )
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{
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return CLASS_E_NOAGGREGATION;
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}
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//Create the object, passing function to notify on destruction
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pNewSynchronizeInstance = new CSynchronizeInvoke(); // initialized RefCount to 1.
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if( NULL == pNewSynchronizeInstance )
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{
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return hr;
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}
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hr = pNewSynchronizeInstance->QueryInterface( riid, ppvObj );
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pNewSynchronizeInstance->Release(); // release our copy of the object
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return hr;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CClassFactory::LockServer, public
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//
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// Synopsis: Locks the Server
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//
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// Arguments: [fLock] - To Lock or Unlock
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//
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// Returns: Appropriate status code
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//
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// Modifies:
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//
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// History: 05-Nov-97 rogerg Created.
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP CClassFactory::LockServer( BOOL fLock )
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{
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if( fLock )
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{
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AddRefOneStopLifetime(TRUE /*External*/);
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}
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else
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{
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ReleaseOneStopLifetime(TRUE /*External*/);
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}
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return NOERROR;
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}
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