/*

* 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 the License "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:  

*

*/

#ifndef __STOPPER_H__

#define __STOPPER_H__

// INCLUDES

// CONSTANTS

// DATA TYPES

// CLASS DECLARATION

// FORWARD DECLARATIONS

class CMemoryPool;

/**

*  An active object to schedule the stop of all on-going operations

*  @lib memman.lib

*  @since 3.1

*/

class CStopScheduler : public CActive

	{

	public:

        enum TNextStop

            {

            ENormalStop     = 0x01,

            EEmergencyStop  = 0x02,

            EAllStop        = 0x03

            };

        enum TSchedulerState

            {

            EIdle = 0,

            ECheckMemory,

            EStopLoading

            };

		CStopScheduler( CMemoryPool& aAllocator );	

		~CStopScheduler();

        /**

        * from CAcitve

        * @since 3.1

        * @param 

        * @return 

        */   

		void RunL();

        /**

        * start the stop scheduler

        * @since 3.1

        * @param aMemSize amount of memory causes the last allocation fail

        * @return 

        */   

		void Start( TSchedulerState aState, TInt aMemSize );

        /**

        * from CActive

        * @since 3.1

        * @param 

        * @return 

        */   

		void DoCancel();

	private:		

        void SelfComplete();

        void StopLoading( TOOMPriority aPriority );

        void CheckMemoryDefered( TTimeIntervalMicroSeconds32 aDelay );

		CMemoryPool&    iMemoryPool;

		TInt 		    iMemRequested;

        TSchedulerState iState;

        RTimer          iCheckTimer;

        TInt            iNextStop;

	};