/*

* Copyright (c) 2006 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:  DRM Queue

*

*/

#ifndef CDRMQUEUE_H

#define CDRMQUEUE_H

//*** system include files go here:

#include <e32base.h>

//*** user include files go here:

//*** forward declarations go here:

//*** constants go here:

namespace DRM

{

 /**

  *  DRM Queue

  *

  *

  *

  *  @lib drmutility.lib

  *  @since S60 v4.0

  */

template< class C > class CDrmQueue : public CBase

    {

public:

    /**

    * Construction function

    */

    static CDrmQueue<C>* NewLC();

    /**

    * Construction function

    */

    static CDrmQueue<C>* NewL();

    /**

    * Destructor.

    */

    ~CDrmQueue();

    /**

    * C++ default constructor.

    */

    CDrmQueue();

    /**

    * Checks the rights and their status for a specific unique id

    * implementation

    *

    * @param[in]   aData : a pointer to the data object

    */

    void AppendToQueueL( C* aData );

    /**

    * Checks the rights and their status for a specific unique id

    * implementation

    *

    * @return pointer to popped data.

    */

    C* PopFront();

    /**

    * implementation

    * @param[in]   aId : ID representing data to be popped from queue

    */

    C* PopItem( TInt aId );

private:

    /**

    * 2nd phase constructor.

    */

    void ConstructL();

    struct QueueData

        {

        C* iData;

        QueueData* iNext;

        };

    // Operation Queue:

    QueueData* iFirst;

    QueueData* iLast;

    // To prevent queue handling from being messed up by threads

    RSemaphore iSemaphore;

    };

}

// Since it's a template class include the implementation

#endif // CDRMAUTOMATEDUSAGE_H