PROMS/DSOFramer/Source2005/classfactory.cpp

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+/***************************************************************************
+ * CLASSFACTORY.CPP
+ *
+ * CDsoFramerClassFactory: The Class Factroy for the control.
+ *
+ *  Copyright <20>1999-2004; Microsoft Corporation. All rights reserved.
+ *  Written by Microsoft Developer Support Office Integration (PSS DSOI)
+ * 
+ *  This code is provided via KB 311765 as a sample. It is not a formal
+ *  product and has not been tested with all containers or servers. Use it
+ *  for educational purposes only. See the EULA.TXT file included in the
+ *  KB download for full terms of use and restrictions.
+ *
+ *  THIS CODE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, 
+ *  EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
+ *  WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ ***************************************************************************/
+#include "dsoframer.h"
+
+////////////////////////////////////////////////////////////////////////
+// CDsoFramerClassFactory - IClassFactory Implementation
+//
+//  This is a fairly simple CF. We don't provide support for licensing
+//  in this sample because it is just a sample. If licensing is important
+//  you should change the class to support IClassFactory2.
+//
+
+////////////////////////////////////////////////////////////////////////
+// CDsoFramerClassFactory::QueryInterface
+//
+STDMETHODIMP CDsoFramerClassFactory::QueryInterface(REFIID riid, void** ppv)
+{
+	ODS("CDsoFramerClassFactory::QueryInterface\n");
+	CHECK_NULL_RETURN(ppv, E_POINTER);
+	
+	if ((IID_IUnknown == riid) || (IID_IClassFactory == riid))
+	{
+        SAFE_SET_INTERFACE(*ppv, (IClassFactory*)this);
+		return S_OK;
+	}
+
+    *ppv = NULL;
+	return E_NOINTERFACE;
+}
+
+////////////////////////////////////////////////////////////////////////
+// CDsoFramerClassFactory::AddRef
+//
+STDMETHODIMP_(ULONG) CDsoFramerClassFactory::AddRef(void)
+{
+	TRACE1("CDsoFramerClassFactory::AddRef - %d\n", m_cRef+1);
+    return ++m_cRef;
+}
+
+////////////////////////////////////////////////////////////////////////
+// CDsoFramerClassFactory::Release
+//
+STDMETHODIMP_(ULONG) CDsoFramerClassFactory::Release(void)
+{
+	TRACE1("CDsoFramerClassFactory::Release - %d\n", m_cRef-1);
+    if (0 != --m_cRef) return m_cRef;
+
+	ODS("CDsoFramerClassFactory delete\n");
+	InterlockedDecrement((LPLONG)&v_cLocks);
+    delete this;
+    return 0;
+}
+
+////////////////////////////////////////////////////////////////////////
+// CDsoFramerClassFactory::CreateInstance
+//
+//  Creates an instance of our control.
+//
+STDMETHODIMP CDsoFramerClassFactory::CreateInstance(LPUNKNOWN punk, REFIID riid, void** ppv)
+{
+	HRESULT hr;
+	CDsoFramerControl* pocx;
+	IUnknown* pnkInternal;
+
+	ODS("CDsoFramerClassFactory::CreateInstance\n");
+	CHECK_NULL_RETURN(ppv, E_POINTER);	*ppv = NULL;
+
+ // Aggregation requires you ask for (internal) IUnknown
+	if ((punk) && (riid != IID_IUnknown)) 
+		return E_INVALIDARG;
+
+ // Create a new instance of the control...
+	pocx = new CDsoFramerControl(punk);
+	CHECK_NULL_RETURN(pocx, E_OUTOFMEMORY);
+
+ // Grab the internal IUnknown to use for the QI (you don't agg in CF:CreateInstance)...
+	pnkInternal = (IUnknown*)&(pocx->m_xInternalUnknown);
+
+ // Initialize the control (windows, etc.) and QI for requested interface...
+	if (SUCCEEDED(hr = pocx->InitializeNewInstance()) &&
+		SUCCEEDED(hr = pnkInternal->QueryInterface(riid, ppv)))
+	{
+		InterlockedIncrement((LPLONG)&v_cLocks); // on success, bump up the lock count...
+	}
+	else {delete pocx; *ppv = NULL;} // else cleanup the object
+
+	return hr;
+}
+
+////////////////////////////////////////////////////////////////////////
+// CDsoFramerClassFactory::LockServer
+//
+//  Keeps the server loaded in memory.
+//
+STDMETHODIMP CDsoFramerClassFactory::LockServer(BOOL fLock)
+{
+	TRACE1("CDsoFramerClassFactory::LockServer - %d\n", fLock);
+	if (fLock) InterlockedIncrement((LPLONG)&v_cLocks);
+	else InterlockedDecrement((LPLONG)&v_cLocks);
+	return S_OK;
+}
+