memspy/Driver/Kernel/Include/MemSpyDriverXferBuffer.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:57:15 +0200
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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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#ifndef MEMSPYDRIVERXFERBUFFER_H
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#define MEMSPYDRIVERXFERBUFFER_H
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// System includes
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#include <e32cmn.h>
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#include <kernel.h>
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// Classes referenced
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class DMemSpyDriverDevice;
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class DMemSpyDriverXferBuffer : public DBase
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	{
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    friend class RMemSpyMemStreamWriter;
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public:
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	DMemSpyDriverXferBuffer( DMemSpyDriverDevice& aDevice, DThread& aThread );
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	~DMemSpyDriverXferBuffer();
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    TInt Construct( TInt aSize );
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public: // API
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    TInt Size() const;
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    TInt GrowBy( TInt aSize );
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    TInt EnsureCapacity( TInt aSize );
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    void Reset();
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private: // Internal methods
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    TInt WriteToClient( TDes8* aDestinationPointer, TInt aLength );
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    DThread& ClientThread();
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    TUint8* Ptr();
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private: // Data members
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    DMemSpyDriverDevice& iDevice;
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	DThread& iClientThread;
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    TInt iSize;
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    TAny* iBuffer;
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	};
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#endif