/*

* 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:

*

*/

#ifndef MEMSPYDRIVERXFERBUFFER_H

#define MEMSPYDRIVERXFERBUFFER_H

// System includes

#include <e32cmn.h>

#include <kernel.h>

// Classes referenced

class DMemSpyDriverDevice;

class DMemSpyDriverXferBuffer : public DBase

	{

    friend class RMemSpyMemStreamWriter;

public:

	DMemSpyDriverXferBuffer( DMemSpyDriverDevice& aDevice, DThread& aThread );

	~DMemSpyDriverXferBuffer();

    TInt Construct( TInt aSize );

public: // API

    TInt Size() const;

    TInt GrowBy( TInt aSize );

    TInt EnsureCapacity( TInt aSize );

    void Reset();

private: // Internal methods

    TInt WriteToClient( TDes8* aDestinationPointer, TInt aLength );

    DThread& ClientThread();

    TUint8* Ptr();

private: // Data members

    DMemSpyDriverDevice& iDevice;

	DThread& iClientThread;

    TInt iSize;

    TAny* iBuffer;

	};

#endif