examples/Base/IPC/ClientServer/Gettingstarted/transient/test/plugin.h

// Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
// Transient server example - plugin class
//

#ifndef __PLUGIN_H__
#define __PLUGIN_H__

#include <e32std.h>

template <class T> class CPlugIn
        {
        typedef T* (*TFactoryL)();
public:
        static T* NewL(const TDesC& aDllName);
        void Close();
protected:
        inline virtual ~CPlugIn() {}
private:
        RLibrary iLibrary;
        };

template <class T> T* CPlugIn<T>::NewL(const TDesC& aDllName)
        {
        RLibrary l;
        User::LeaveIfError(l.Load(aDllName));
        CleanupClosePushL(l);
        T* plugin=TFactoryL(l.Lookup(1))();
        static_cast<CPlugIn<T>*>(plugin)->iLibrary=l;
        CleanupStack::Pop();
        return plugin;
        }

template <class T> void CPlugIn<T>::Close()
        {
        RLibrary l(iLibrary);
        delete this;
        l.Close();
        }

#endif

---