/*

* Copyright (c) 2009 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:  

*

*/

#include "MemSamplerImpl.h"

#ifndef __PI_MEMORY_EVENT_HANDLER__

#define __PI_MEMORY_EVENT_HANDLER__

#include <piprofiler/ProfilerGenericClassesKrn.h>

// CONSTANTS

const TInt KEventBufferSize = 257;

class DProfilerSampleBuffer;

class DMemoryEventHandler : public DKernelEventHandler

    {

public:

    // constructor

    TInt Create();

    ~DMemoryEventHandler();

    TInt Start();

    TInt Stop();

    TBool Tracking() {return iTracking;}

    TBool SampleNeeded();

private:

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

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

    // handle chunk activity

    TBool HandleAddChunk(DChunk* aChunk);

    TBool HandleUpdateChunk(DChunk* aChunk);

    TBool HandleDeleteChunk(DChunk* aChunk);

    // handle chunk activity

    TBool HandleAddThread(DThread* aThread);

    TBool HandleUpdateThread(DThread* aThread);

    TBool HandleDeleteThread(DThread* aThread);

    // handle chunk activity

    TBool HandleAddProcess(DProcess* aProcess);

    TBool HandleUpdateProcess(DProcess* aProcess);

    TBool HandleDeleteProcess(DProcess* aProcess);

    // handle library activity

    TBool HandleAddLibrary(DLibrary* aLibrary, DThread* aThread);

    TBool HandleDeleteLibrary(DLibrary* aLibrary);

    // data handling

    TInt AddHeader();

    TInt AddFooter();

    TInt EncodeTotalMemory();

    TInt EncodeNameCode();

    TInt EncodeNewCode();

    TInt EncodeUpdateCode();

    TInt EncodeRemoveCode();

    TInt EncodeChunkName(DThread& t);

    TInt EncodeChunkName(DChunk& c);

    TInt EncodeChunkName(DLibrary& l);

    TInt EncodeChunkData(DThread& t);

    TInt EncodeChunkData(DChunk& c);

    TInt EncodeChunkData(DLibrary& l, DThread& t);

private:

    /** Lock serialising calls to event handler */

    DMutex* iLock;

    TBool iTracking;

    DProfilerSampleBuffer*  iSampleBuffer;

    TInt iCounters[EEventLimit];

    TUint8      iSample[KEventBufferSize];

    TPtr8       iSampleDescriptor;

    TUint32     iPreviousCount;

    };

#endif