// 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 __RCHUNKPOOL_H_

#define __RCHUNKPOOL_H_

#include "cmemchunk.h"

class RChunkPool

	{

public:

	RChunkPool ( TInt aBlockSize, TInt aThresholdValue, TInt aMinGrowth, CChunkManager& aChunkManager );

	RChunkPool ( CChunkManager& aChunkManager, TInt aBlockSize );

	void OpenL ();

	void Close ();

	TInt Alloc ( RMemCellList& aList, TInt aSize );

	TInt GrowAndAlloc ( RMemCellList& aList, TInt aSize, TInt aNumBlocks );

	void FreeToPool ( RMemCell* aMemCell );

	void AppendToFreeList ( CMemChunk* aChunk );

	static TInt Compare ( const RChunkPool& aLHSPool, const RChunkPool& aRHSPool );

	TInt BlockSize () const

		{

		return iBlockSize;

		}

	void Wait ()

		{

		iFreeListLock.Wait ();

		}

	void Signal ()

		{

		iFreeListLock.Signal ();

		}

	void SetThreshold ( TInt aThreshold )

		{

		iThresholdValue = aThreshold;

		}

	void SetGrowth ( TInt aGrowth )

		{

		iMinGrowth = aGrowth;

		}

	void Append ( CMemChunk* aNewChunk )

		{

		iAllocatedChunks.Append ( aNewChunk );

		}

	TInt FreeSpace ()

		{

		return iFreeSpace;

		}

	CChunkManager& ChunkManager ()

		{

		return iChunkManager;

		}

private:	

	TInt GrowPool ( TUint aNumBlocks );

private:

	TInt						iBlockSize;

	RPointerArray<CMemChunk>	iAllocatedChunks;

	CChunkManager&				iChunkManager;

	RMemCellList				iFreeBlocks;

	RFastLock					iFreeListLock;

	TInt						iFreeSpace;

	TInt						iUsedSpace; //TODO: can be removed???

	TInt 						iThresholdValue;

	TInt 						iMinGrowth;

	};

#endif /*__RCHUNKPOOL_H_*/