// Copyright (c) 2008-2009 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:

// @file

// @internalComponent

// 

//

#ifndef __CMEMCHUNK_

#define __CMEMCHUNK_

#include "rmemcell.h"

class RMemCellList

	{

public:

	RMemCellList ()

		{

		Init ();

		}

	RMemCellList ( RMemCell* aFirst, RMemCell* aLast )

		: iNext ( aFirst ), iLast ( aLast )

		{

		}

	void Append ( RMemCell* aPtr );

	void Append ( RMemCellList& aList );

	TInt Transfer ( RMemCellList& aList, TInt aSize );

	void Init ()

		{

		iNext = iLast = NULL;		

		}

	TBool IsEmpty ()

		{

		return ( iNext == NULL ) ? ETrue : EFalse;	

		}

	RMemCell* First ()

		{

		return iNext;		

		}

	RMemCell* Last ()

		{

		return iLast;

		}

private:

	RMemCell* iNext;

	RMemCell* iLast;		

	};

class CMemChunk : public CBase

	{

public:

	static CMemChunk* New ( CChunkAllocator& aAllocator, RChunkPool& aChunkPool, TInt aNumBlocks , TInt aBlockSize );

	~CMemChunk ();

	RMemCellList& List ()

		{

		return iQueue;

		}

	TInt NumBlocks ()

		{

		return iNumBlocks;

		}

private:

	CMemChunk ( CChunkAllocator& aAllocator, TInt aNumBlocks );

	TAny* operator new (TUint aNumBlocks, TInt aExtra, CChunkAllocator& aAllocator );

	void operator delete ( TAny* aPtr, TInt aExtra, CChunkAllocator& aAllocator );

	void CMemChunk::operator delete ( TAny* aPtr );

private:

	RMemCellList		iQueue;

	CChunkAllocator&	iChunkAllocator;	

	TUint				iNumBlocks;

	};

#endif /*__CMEMCHUNK_*/