/*

* Copyright (c) 2004 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: 

*

*/

/** Event handler and container for all objects being tracked.  */

#ifndef __TRKEVENTHANDLER_H__

#define __TRKEVENTHANDLER_H__

class DMetroTrkEventHandler : public DKernelEventHandler

{

	public:

		DMetroTrkEventHandler();

		TInt Create(DLogicalDevice* aDevice, DLogicalChannel* aChannel, DThread* aClient);

		~DMetroTrkEventHandler();

		TInt Start();

		TInt Stop();

	private:

		static TUint EventHandler(TKernelEvent aEvent, TAny* a1, TAny* a2, TAny* aThis);

		TUint HandleEvent(TKernelEvent aType, TAny* a1, TAny* a2);

		TBool HandleEventKillThread(DThread* a1);

		TBool HandleSwException(TExcType aExcType);

		TBool HandleHwException(TArmExcInfo* aExcInfo);

		TBool HandleUserTrace(TText* aStr, TInt aLen);

		void AddProcess(DProcess *aProcess, DThread *aThread);

		void StartThread(DThread *aThread);

		void RemoveProcess(DProcess *aProcess);

		void AddLibrary(DLibrary *aLibrary, DThread *aThread);

		void RemoveLibrary(DLibrary *aLibrary);

		void AddCodeSegment(DCodeSeg *aCodeSeg, DProcess *aProcess);

		void RemoveCodeSegment(DCodeSeg *aCodeSeg, DProcess *aProcess);

	private:

		/** Lock serialising calls to event handler */

		DSemaphore* iLock;

		TBool iTracking;

		/** Tracking list (of TTrackedObject).

			Must be accessed only when tracking is disabled or with iLock held.

			Object addresses are used as keys and so must be unique.

		 */

		TInt iOOM;

		TInt iErrorCount;

		TInt iCounters[EEventLimit];

		DLogicalDevice* iDevice;	// open reference to LDD for avoiding lifetime issues

		DThread* iClientThread;

		DLogicalChannel* iChannel;

};

#endif //__TRKEVENTHANDLER_H__