// 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: Comms buffer queue

//

#ifndef __COMMSBUFQ_H__

#define __COMMSBUFQ_H__

#include <e32base.h>

#include <comms-infras/commsbufchain.h>

class RCommsBuf;

class RCommsBufChain;

/**

A linked list of RCommsBuf

Note: Currently the class is tagged as internal technology. In order to move this class

to other categories a detailed analysis of APIs to be conducted

@internalTechnology

*/

class RCommsBufQ

	{

	friend class CSystemSharedBufPool;

	__DECLARE_CLEANUP

public:

	inline RCommsBufQ();

	IMPORT_C RCommsBufQ(RCommsBuf* aChain);

	inline RCommsBufQ(RCommsBuf* aFirst, RCommsBuf* aLast);

	inline TBool IsEmpty();

	inline RCommsBuf* First();

	inline RCommsBuf* Last();

	IMPORT_C void Init();

	IMPORT_C void Assign(RCommsBufQ& aQueue);

	IMPORT_C void Assign(RCommsBufChain& aChain);

	IMPORT_C void Append(RCommsBuf* aBuf);

	IMPORT_C void Append(RCommsBufQ& aQueue);

	IMPORT_C void Append(RCommsBufChain& aChain);

	IMPORT_C void Prepend(RCommsBuf* aBuf);

	IMPORT_C void Prepend(RCommsBufQ& aQueue);

	IMPORT_C void Prepend(RCommsBufChain& aChain);

	IMPORT_C RCommsBuf* Remove();

	IMPORT_C void Free();

	protected:

	RCommsBuf* iNext;

	RCommsBuf* iLast;

	protected:

	IMPORT_C TInt Transfer(RCommsBufQ& aQueue, TInt aSize, TInt aBufSize, TInt& aCount);

	IMPORT_C RCommsBuf* RemoveLast();

	};

#include <comms-infras/commsbufq.inl>

#endif // __COMMSBUFQ_H__