// 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