// Copyright (c) 2008-2009 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:

//

/**

 @file

 @internalComponent

*/

#ifndef MTHRASH_H

#define MTHRASH_H

class DThrashMonitor

	{

public:

	DThrashMonitor();

	void Start();

	TInt ThrashLevel();

	TInt SetThresholds(TUint thrashing, TUint good);

	void NotifyStartPaging();  			// The current thread has started a paging operation

	void NotifyEndPaging();    			// The current thread has completed a paging operation

private:

	enum TCount

		{

		ECountThreadsPaging,

		EMaxCount

		};

	struct TCountData

		{

		TInt iCount;					// Current value of counter

		TUint32 iLastUpdateTime;		// Time counter was last updated

		TInt64 iTotal;					// Accumulator for ticks * value

		TInt iAverage;					// Average value of counter for last time period * 100

		};

private: 

	void UpdateCount(TCount aCount, TInt aDelta);	

	void RecalculateThrashLevel();		// Update internal state, called periodically from timer DFC

	static void UpdateDfcFunc(TAny* aPtr);

private:

	TBool iRunning;

	NTimer iUpdateTimer;

	TDfc iUpdateDfc;

	TUint32 iLastUpdateTime;

	NFastMutex iMutex;

	TInt iThrashLevel;

	TBool iIsThrashing;

	TInt iThresholdThrashing;

	TInt iThresholdGood;

	TCountData iCount[EMaxCount];

	};

extern DThrashMonitor TheThrashMonitor;

#endif