148 lines
3.6 KiB
C++
148 lines
3.6 KiB
C++
//---------------------------------------------------------------------------
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//
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// File: CLSSFACT.CPP
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//
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// Implements a class factory object that creates CPropSheetExt objects.
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//
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//---------------------------------------------------------------------------
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#include "clssfact.h"
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extern ULONG g_cObj; // See PLUSTAB.CPP
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extern ULONG g_cLock; // See PLUSTAB.CPP
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//---------------------------------------------------------------------------
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// ObjectDestroyed()
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//
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// Function for the CPropSheetExt object to call when it is destroyed.
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// Because we're in a DLL, we only track the number of objects here,
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// letting DllCanUnloadNow take care of the rest.
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//---------------------------------------------------------------------------
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void FAR PASCAL ObjectDestroyed( void )
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{
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g_cObj--;
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return;
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}
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//---------------------------------------------------------------------------
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// Class Member functions
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// Constructor
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//---------------------------------------------------------------------------
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CClassFactory::CClassFactory()
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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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// Destructor
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//---------------------------------------------------------------------------
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CClassFactory::~CClassFactory( void )
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{
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return;
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}
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//---------------------------------------------------------------------------
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// QueryInterface()
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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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//Any interface on this object is the object pointer.
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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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++m_cRef;
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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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// AddRef()
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//---------------------------------------------------------------------------
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STDMETHODIMP_(ULONG) CClassFactory::AddRef()
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{
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return ++m_cRef;
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}
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//---------------------------------------------------------------------------
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// Release()
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//---------------------------------------------------------------------------
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STDMETHODIMP_(ULONG) CClassFactory::Release()
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{
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ULONG cRefT;
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cRefT = --m_cRef;
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if( 0L == m_cRef )
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delete this;
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return cRefT;
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}
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//---------------------------------------------------------------------------
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// CreateInstance()
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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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CPropSheetExt* pObj;
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HRESULT hr = E_OUTOFMEMORY;
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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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//Verify that a controlling unknown asks for IShellPropSheetExt
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if( IsEqualIID( riid, IID_IShellPropSheetExt ) )
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{
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//Create the object, passing function to notify on destruction
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pObj = new CPropSheetExt( pUnkOuter, ObjectDestroyed );
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if( NULL == pObj )
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{
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return hr;
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}
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hr = pObj->QueryInterface( riid, ppvObj );
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//Kill the object if initial creation or FInit failed.
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if( FAILED(hr) )
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{
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delete pObj;
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}
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else
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{
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g_cObj++;
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}
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return hr;
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}
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return E_NOINTERFACE;
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}
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//---------------------------------------------------------------------------
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// LockServer()
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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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g_cLock++;
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}
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else
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{
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g_cLock--;
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}
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return NOERROR;
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}
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