/**

* Copyright (c) 2003-2009 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:

* Buffer class declarations

* Contains I/O Buffer class declaration

* 

*

*/

/**

 @file Iobuffer.h

 @internalComponent 

*/

#ifndef __IO_BUFFERS_H

#define __IO_BUFFERS_H

#include <telsess.h>

class MIONotifier

/**

@internalComponent

*/

	{

public:

	virtual void WriteComplete() = 0;

	virtual void WriteError(TInt aError) = 0;

	virtual void ReadComplete(TInt aError) = 0;

	virtual void ReadCompleteL() = 0;

	virtual void Event(TInt aEvent,TInt aEventCode) = 0;

	};

class CActiveWriter;

class CActiveReader;

NONSHARABLE_CLASS(CIOBufferControl) : public CBase , public MIONotifier

/**

@internalComponent

*/

	{ 

public:

	CIOBufferControl();

	~CIOBufferControl();

	static CIOBufferControl* NewL(MIONotifier* aNotifier);

	void ConstructL(MIONotifier* aNotifier);

	TInt WriteUrgent(HBufC8* aBuffer);

	TInt Write(HBufC8* aBuffer);

	TInt Read(TDes8& aBuffer);

	void SetWriter(CActiveWriter* aWriter);

	void SetReader(CActiveReader* aReader);

	void Reset();

	// MIONotifier

	void WriteComplete();

	void WriteError(TInt aError);

	void ReadCompleteL();

	void ReadComplete(TInt aError);

	void Event(TInt aEvent,TInt aEventCode);

public:

private:

	CActiveWriter*								iWriter;

	CActiveReader*								iReader;

	MIONotifier*								iNotifier;

	HBufC8*										iWriteBuffers[2];

	TInt iLiveIndex;

	TInt iQueueIndex;

	HBufC8*										iUrgent;

	};

#endif