TB9.2 Example Applications: examples/Base/IPC/ClientServer/Gettingstarted/transient/test/plugin.h Source File

00001 // Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).
+00002 // All rights reserved.
+00003 // This component and the accompanying materials are made available
+00004 // under the terms of "Eclipse Public License v1.0"
+00005 // which accompanies this distribution, and is available
+00006 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
+00007 //
+00008 // Initial Contributors:
+00009 // Nokia Corporation - initial contribution.
+00010 //
+00011 // Contributors:
+00012 //
+00013 // Description:
+00014 // Transient server example - plugin class
+00015 //
+00016 
+00017 #ifndef __PLUGIN_H__
+00018 #define __PLUGIN_H__
+00019 
+00020 #include <e32std.h>
+00021 
+00022 template <class T> class CPlugIn
+00023         {
+00024         typedef T* (*TFactoryL)();
+00025 public:
+00026         static T* NewL(const TDesC& aDllName);
+00027         void Close();
+00028 protected:
+00029         inline virtual ~CPlugIn() {}
+00030 private:
+00031         RLibrary iLibrary;
+00032         };
+00033 
+00034 template <class T> T* CPlugIn<T>::NewL(const TDesC& aDllName)
+00035         {
+00036         RLibrary l;
+00037         User::LeaveIfError(l.Load(aDllName));
+00038         CleanupClosePushL(l);
+00039         T* plugin=TFactoryL(l.Lookup(1))();
+00040         static_cast<CPlugIn<T>*>(plugin)->iLibrary=l;
+00041         CleanupStack::Pop();
+00042         return plugin;
+00043         }
+00044 
+00045 template <class T> void CPlugIn<T>::Close()
+00046         {
+00047         RLibrary l(iLibrary);
+00048         delete this;
+00049         l.Close();
+00050         }
+00051 
+00052 #endif
+00053 
+