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- /*
- * EKOALA3.CPP
- * Koala Object EXE Server Chapter 6
- *
- * Example object implemented in an EXE.
- *
- * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
- *
- * Kraig Brockschmidt, Microsoft
- * Internet : kraigb@microsoft.com
- * Compuserve: >INTERNET:kraigb@microsoft.com
- */
-
-
- #define INITGUIDS
- #include "ekoala3.h"
-
-
- //Count number of objects and number of locks.
- ULONG g_cObj=0;
- ULONG g_cLock=0;
-
- //Make window handle global so other code can cause a shutdown
- HWND g_hWnd=NULL;
-
-
- /*
- * WinMain
- *
- * Purpose:
- * Main entry point of application.
- */
-
- int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hInstPrev
- , LPSTR pszCmdLine, int nCmdShow)
- {
- MSG msg;
- PAPP pApp;
-
- SETMESSAGEQUEUE;
-
- pApp=new CApp(hInst, hInstPrev, pszCmdLine, nCmdShow);
-
- if (NULL==pApp)
- return -1;
-
- if (pApp->Init())
- {
- while (GetMessage(&msg, NULL, 0,0 ))
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- }
-
- delete pApp;
- return msg.wParam;
- }
-
-
-
- /*
- * KoalaWndProc
- *
- * Purpose:
- * Standard window class procedure.
- */
-
- LRESULT APIENTRY KoalaWndProc(HWND hWnd, UINT iMsg
- , WPARAM wParam, LPARAM lParam)
- {
- PAPP pApp;
-
- pApp=(PAPP)GetWindowLong(hWnd, KOALAWL_STRUCTURE);
-
- switch (iMsg)
- {
- case WM_NCCREATE:
- pApp=(PAPP)(((LPCREATESTRUCT)lParam)->lpCreateParams);
- SetWindowLong(hWnd, KOALAWL_STRUCTURE, (LONG)pApp);
- return (DefWindowProc(hWnd, iMsg, wParam, lParam));
-
- //CHAPTER6MOD
- case WM_COMMAND:
- switch (LOWORD(wParam))
- {
- case IDM_CALLBLOCK:
- pApp->m_fBlock=!pApp->m_fBlock;
- CheckMenuItem(GetMenu(hWnd), IDM_CALLBLOCK
- , pApp->m_fBlock ? MF_CHECKED : MF_UNCHECKED);
- break;
-
- case IDM_CALLDELAY:
- pApp->m_fDelay=!pApp->m_fDelay;
- CheckMenuItem(GetMenu(hWnd), IDM_CALLDELAY
- , pApp->m_fDelay ? MF_CHECKED : MF_UNCHECKED);
- break;
- }
- break;
-
-
- case WM_CLOSE:
- //Don't close with object's active
- if (0==g_cObj && 0==g_cLock)
- return (DefWindowProc(hWnd, iMsg, wParam, lParam));
-
- break;
- //End CHAPTER6MOD
-
- case WM_DESTROY:
- PostQuitMessage(0);
- break;
-
- default:
- return (DefWindowProc(hWnd, iMsg, wParam, lParam));
- }
-
- return 0L;
- }
-
-
-
-
- /*
- * ObjectDestroyed
- *
- * Purpose:
- * Function for the Koala object to call when it gets destroyed.
- * We destroy the main window if the proper conditions are met
- * for shutdown.
- */
-
- void ObjectDestroyed(void)
- {
- g_cObj--;
-
- //No more objects and no locks, shut the app down.
- if (0L==g_cObj && 0L==g_cLock && IsWindow(g_hWnd))
- PostMessage(g_hWnd, WM_CLOSE, 0, 0L);
-
- return;
- }
-
-
-
-
- /*
- * CApp::CApp
- * CApp::~CApp
- *
- * Constructor Parameters:
- * hInst HINSTANCE of the Application from WinMain
- * hInstPrev HINSTANCE of a previous instance from WinMain
- * pszCmdLine LPSTR of the command line.
- * nCmdShow UINT specifying how to show the app window,
- * from WinMain.
- */
-
- CApp::CApp(HINSTANCE hInst, HINSTANCE hInstPrev
- , LPSTR pszCmdLine, UINT nCmdShow)
- {
- //Initialize WinMain parameter holders.
- m_hInst =hInst;
- m_hInstPrev =hInstPrev;
- m_pszCmdLine=pszCmdLine;
- m_nCmdShow =nCmdShow;
-
- m_hWnd=NULL;
- m_dwRegCO=0;
- m_pIClassFactory=NULL;
- m_fInitialized=FALSE;
-
- //CHAPTER6MOD
- m_pMsgFilter=NULL;
- m_fBlock=FALSE;
- m_fDelay=FALSE;
- //End CHAPTER6MOD
- return;
- }
-
-
- CApp::~CApp(void)
- {
- //CHAPTER6MOD
- if (NULL!=m_pMsgFilter)
- {
- CoRegisterMessageFilter(NULL, NULL);
- ReleaseInterface(m_pMsgFilter);
- }
- //End CHAPTER6MOD
-
- //Opposite of CoRegisterClassObject; class factory ref is now 1
- if (0L!=m_dwRegCO)
- CoRevokeClassObject(m_dwRegCO);
-
- //The last Release, which frees the class factory.
- if (NULL!=m_pIClassFactory)
- m_pIClassFactory->Release();
-
- if (m_fInitialized)
- CoUninitialize();
-
- return;
- }
-
-
-
-
- /*
- * CApp::Init
- *
- * Purpose:
- * Initializes an CApp object by registering window classes,
- * creating the main window, and doing anything else prone to
- * failure. If this function fails the caller should guarantee
- * that the destructor is called.
- *
- * Parameters:
- * None
- *
- * Return Value:
- * BOOL TRUE if successful, FALSE otherwise.
- */
-
- BOOL CApp::Init(void)
- {
- WNDCLASS wc;
- HRESULT hr;
- #ifndef WIN32
- DWORD dwVer;
- #endif
-
- //Fail if we're run outside of CoGetClassObject
- if (lstrcmpiA(m_pszCmdLine, "-Embedding")
- && lstrcmpiA(m_pszCmdLine, "/Embedding"))
- return FALSE;
-
- #ifndef WIN32
- dwVer=CoBuildVersion();
-
- if (rmm!=HIWORD(dwVer))
- return FALSE;
-
- //No need to check minor versions.
- #endif
-
- //Call CoInitialize so we can call other Co* functions
- if (FAILED(CoInitialize(NULL)))
- return FALSE;
-
- m_fInitialized=TRUE;
-
- if (!m_hInstPrev)
- {
- wc.style = CS_HREDRAW | CS_VREDRAW;
- wc.lpfnWndProc = KoalaWndProc;
- wc.cbClsExtra = 0;
- wc.cbWndExtra = CBWNDEXTRA;
- wc.hInstance = m_hInst;
- wc.hIcon = NULL;
- wc.hCursor = NULL;
- wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
- //CHAPTER6MOD
- wc.lpszMenuName = MAKEINTRESOURCE(IDR_MENU);
- //End CHAPTER6MOD
- wc.lpszClassName = TEXT("Koala");
-
- if (!RegisterClass(&wc))
- return FALSE;
- }
-
- //CHAPTER6MOD
- m_hWnd=CreateWindow(TEXT("Koala"), TEXT("Koala Object")
- , WS_OVERLAPPEDWINDOW, 400, 35, 350, 250
- , NULL, NULL, m_hInst, this);
-
- if (NULL==m_hWnd)
- return FALSE;
-
- ShowWindow(m_hWnd, SW_SHOW);
- UpdateWindow(m_hWnd);
- //End CHAPTER6MOD
-
- g_hWnd=m_hWnd;
-
- /*
- * Create our class factory and register it for this application
- * using CoRegisterClassObject. We are able to service more than
- * one object at a time so we use REGCLS_MULTIPLEUSE.
- */
- m_pIClassFactory=new CKoalaClassFactory();
-
- if (NULL==m_pIClassFactory)
- return FALSE;
-
- //Since we hold on to this, we should AddRef it.
- m_pIClassFactory->AddRef();
-
- hr=CoRegisterClassObject(CLSID_Koala, m_pIClassFactory
- , CLSCTX_LOCAL_SERVER, REGCLS_MULTIPLEUSE, &m_dwRegCO);
-
- if (FAILED(hr))
- return FALSE;
-
- //CHAPTER6MOD
- /*
- * Call CoLockObjectExternal to lock and unlock to show
- * its strong lock effect through IExternalConnection.
- */
- CoLockObjectExternal(m_pIClassFactory, TRUE, FALSE);
- CoLockObjectExternal(m_pIClassFactory, FALSE, FALSE);
-
- //Create and register the message filter
- m_pMsgFilter=new CMessageFilter(this);
-
- if (NULL!=m_pMsgFilter)
- {
- m_pMsgFilter->AddRef();
-
- if (FAILED(CoRegisterMessageFilter(m_pMsgFilter, NULL)))
- ReleaseInterface(m_pMsgFilter);
- }
- //End CHAPTER6MOD
-
- return TRUE;
- }
-
-
-
-
-
-
- /*
- * CKoalaClassFactory::CKoalaClassFactory
- * CKoalaClassFactory::~CKoalaClassFactory
- *
- * Constructor Parameters:
- * None
- */
-
- CKoalaClassFactory::CKoalaClassFactory(void)
- {
- m_cRef=0L;
- //CHAPTER6MOD
- m_pImpIExtConn=new CImpIExternalConnection(this, this);
- //End CHAPTER6MOD
- return;
- }
-
- CKoalaClassFactory::~CKoalaClassFactory(void)
- {
- //CHAPTER6MOD
- DeleteInterfaceImp(m_pImpIExtConn);
- //End CHAPTER6MOD
- return;
- }
-
-
-
-
- /*
- * CKoalaClassFactory::QueryInterface
- * CKoalaClassFactory::AddRef
- * CKoalaClassFactory::Release
- */
-
- STDMETHODIMP CKoalaClassFactory::QueryInterface(REFIID riid
- , PPVOID ppv)
- {
- *ppv=NULL;
-
- if (IID_IUnknown==riid || IID_IClassFactory==riid)
- *ppv=this;
-
- //CHAPTER6MOD
- if (IID_IExternalConnection==riid && NULL!=m_pImpIExtConn)
- *ppv=m_pImpIExtConn;
- //End CHAPTER6MOD
-
- if (NULL!=*ppv)
- {
- ((LPUNKNOWN)*ppv)->AddRef();
- return NOERROR;
- }
-
- return ResultFromScode(E_NOINTERFACE);
- }
-
-
- STDMETHODIMP_(ULONG) CKoalaClassFactory::AddRef(void)
- {
- return ++m_cRef;
- }
-
-
- STDMETHODIMP_(ULONG) CKoalaClassFactory::Release(void)
- {
- if (0L!=--m_cRef)
- return m_cRef;
-
- delete this;
- return 0;
- }
-
-
-
-
-
-
- /*
- * CKoalaClassFactory::CreateInstance
- *
- * Purpose:
- * Instantiates a Koala object returning an interface pointer.
- *
- * Parameters:
- * pUnkOuter LPUNKNOWN to the controlling IUnknown if we are
- * being used in an aggregation.
- * riid REFIID identifying the interface the caller
- * desires to have for the new object.
- * ppvObj PPVOID in which to store the desired
- * interface pointer for the new object.
- *
- * Return Value:
- * HRESULT NOERROR if successful, otherwise E_NOINTERFACE
- * if we cannot support the requested interface.
- */
-
- STDMETHODIMP CKoalaClassFactory::CreateInstance(LPUNKNOWN pUnkOuter
- , REFIID riid, PPVOID ppvObj)
- {
- PCKoala pObj;
- HRESULT hr;
-
- *ppvObj=NULL;
- hr=ResultFromScode(E_OUTOFMEMORY);
-
- //Verify that a controlling unknown asks for IUnknown
- if (NULL!=pUnkOuter && IID_IUnknown!=riid)
- return ResultFromScode(CLASS_E_NOAGGREGATION);
-
- //Create the object telling us to notify us when it's gone.
- pObj=new CKoala(pUnkOuter, ObjectDestroyed);
-
- if (NULL==pObj)
- {
- //This starts shutdown if there are no other objects.
- g_cObj++;
- ObjectDestroyed();
- return hr;
- }
-
- if (pObj->Init())
- hr=pObj->QueryInterface(riid, ppvObj);
-
- g_cObj++;
-
- /*
- * Kill the object if initial creation or Init failed. If
- * the object failed, we handle the g_cObj increment above
- * in ObjectDestroyed.
- */
- if (FAILED(hr))
- {
- delete pObj;
- ObjectDestroyed(); //Handle shutdown cases.
- }
-
- return hr;
- }
-
-
-
-
-
-
- /*
- * CKoalaClassFactory::LockServer
- *
- * Purpose:
- * Increments or decrements the lock count of the serving
- * IClassFactory object. When the number of locks goes to
- * zero and the number of objects is zero, we shut down the
- * application.
- *
- * Parameters:
- * fLock BOOL specifying whether to increment or
- * decrement the lock count.
- *
- * Return Value:
- * HRESULT NOERROR always.
- */
-
- STDMETHODIMP CKoalaClassFactory::LockServer(BOOL fLock)
- {
- if (fLock)
- g_cLock++;
- else
- {
- g_cLock--;
-
- /*
- * Fake an object destruction: this centralizes
- * all the shutdown code in the ObjectDestroyed
- * function, eliminating duplicate code here.
- */
- g_cObj++;
- ObjectDestroyed();
- }
-
- return NOERROR;
- }
-
-
-
-
- //CHAPTER6MOD
- //Class factory implementation of IExternalConnection
-
- /*
- * CImpIExternalConnection::CImpIExternalConnection
- * CImpIExternalConnection::~CImpIExternalConnection
- *
- * Parameters (Constructor):
- * pObj PCKoalaClassFactory of the object we're in.
- * pUnkOuter LPUNKNOWN to which we delegate.
- */
-
- CImpIExternalConnection::CImpIExternalConnection
- (PCKoalaClassFactory pObj, LPUNKNOWN pUnkOuter)
- {
- m_cRef=0;
- m_pObj=pObj;
- m_pUnkOuter=pUnkOuter;
-
- m_cStrong=0;
- m_cWeak=0;
- return;
- }
-
- CImpIExternalConnection::~CImpIExternalConnection(void)
- {
- return;
- }
-
-
-
- /*
- * CImpIExternalConnection::QueryInterface
- * CImpIExternalConnection::AddRef
- * CImpIExternalConnection::Release
- *
- * Purpose:
- * Delegating IUnknown members for CImpIExternalConnection.
- */
-
- STDMETHODIMP CImpIExternalConnection::QueryInterface(REFIID riid
- , LPVOID *ppv)
- {
- return m_pUnkOuter->QueryInterface(riid, ppv);
- }
-
- STDMETHODIMP_(ULONG) CImpIExternalConnection::AddRef(void)
- {
- ++m_cRef;
- return m_pUnkOuter->AddRef();
- }
-
- STDMETHODIMP_(ULONG) CImpIExternalConnection::Release(void)
- {
- --m_cRef;
- return m_pUnkOuter->Release();
- }
-
-
-
-
-
- /*
- * CImpIExternalConnection::AddConnection
- *
- * Purpose:
- * Informs the object that a strong connection has been made to it.
- *
- * Parameters:
- * dwConn DWORD identifying the type of connection, taken
- * from the EXTCONN enumeration.
- * dwReserved DWORD reserved. This is used inside OLE and
- * should not be validated.
- *
- * Return Value:
- * DWORD The number of connection counts on the
- * object, used for debugging purposes only.
- */
-
- STDMETHODIMP_(DWORD) CImpIExternalConnection::AddConnection
- (DWORD dwConn, DWORD dwReserved)
- {
- DWORD dwRet;
- TCHAR szTemp[80];
-
- if (EXTCONN_STRONG & dwConn)
- {
- dwRet=++m_cStrong;
- wsprintf(szTemp
- , TEXT("AddConnection cStrong=%lu"), m_cStrong);
- }
-
- #ifdef WIN32
- if (EXTCONN_WEAK & dwConn)
- {
- dwRet=++m_cWeak;
- wsprintf(szTemp
- , TEXT("ReleaseConnection cWeak=%lu"), m_cWeak);
- }
- #endif
-
- #ifndef WIN32
- ODS(szTemp);
- #else
- MessageBox(NULL, szTemp
- , TEXT("EKoala3: CKoalaClassFactory::IExternalConnection")
- , MB_OK);
- #endif
-
- return dwRet;
- }
-
-
-
- /*
- * CImpIExternalConnection::ReleaseConnection
- *
- * Purpose:
- * Informs an object that a connection has been taken away from
- * it in which case the object may need to shut down.
- *
- * Parameters:
- * dwConn DWORD identifying the type of connection,
- * taken from the EXTCONN enumeration.
- * dwReserved DWORD reserved. This is used inside OLE and
- * should not be validated.
- * dwRerved DWORD reserved
- * fLastReleaseCloses BOOL indicating if the last call to this
- * function should close the object.
- *
- * Return Value:
- * DWORD The number of remaining connection counts on
- * the object, used for debugging purposes only.
- */
-
- STDMETHODIMP_(DWORD) CImpIExternalConnection::ReleaseConnection
- (DWORD dwConn, DWORD dwReserved, BOOL fLastReleaseCloses)
- {
- DWORD dwRet;
- TCHAR szTemp[80];
-
- if (EXTCONN_STRONG & dwConn)
- {
- /*
- * Note: We don't need to close ourselves when the last
- * strong lock is removed; we're just implementing this
- * interface for demonstration.
- */
-
- dwRet=--m_cStrong;
- wsprintf(szTemp
- , TEXT("ReleaseConnection cStrong=%lu"), m_cStrong);
- }
-
- #ifdef WIN32
- if (EXTCONN_WEAK & dwConn)
- {
- dwRet=--m_cWeak;
- wsprintf(szTemp
- , TEXT("ReleaseConnection cWeak=%lu"), m_cWeak);
- }
- #endif
-
- #ifndef WIN32
- ODS(szTemp);
- #else
- MessageBox(NULL, szTemp
- , TEXT("EKoala3: CKoalaClassFactory::IExternalConnection")
- , MB_OK);
- #endif
-
- return dwRet;
- }
-
- //End CHAPTER6MOD
-