1 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // @file

    15 // @internalComponent

    16 // 

    17 //

    18 

    19 #ifndef __RCHUNKPOOL_H_

    20 #define __RCHUNKPOOL_H_

    21 

    22 #include "cmemchunk.h"

    23 

    24 class RChunkPool

    25 	{

    26 public:

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

    28 	RChunkPool ( CChunkManager& aChunkManager, TInt aBlockSize );

    29 	

    30 	void OpenL ();

    31 	void Close ();

    32 	

    33 	TInt Alloc ( RMemCellList& aList, TInt aSize );

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

    35 	void FreeToPool ( RMemCell* aMemCell );

    36 	void AppendToFreeList ( CMemChunk* aChunk );

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

    38 	

    39 	TInt BlockSize () const

    40 		{

    41 		return iBlockSize;

    42 		}

    43 		

    44 	void Wait ()

    45 		{

    46 		iFreeListLock.Wait ();

    47 		}

    48 	

    49 	void Signal ()

    50 		{

    51 		iFreeListLock.Signal ();

    52 		}

    53 		

    54 	void SetThreshold ( TInt aThreshold )

    55 		{

    56 		iThresholdValue = aThreshold;

    57 		}

    58 		

    59 	void SetGrowth ( TInt aGrowth )

    60 		{

    61 		iMinGrowth = aGrowth;

    62 		}

    63 		

    64 	void Append ( CMemChunk* aNewChunk )

    65 		{

    66 		iAllocatedChunks.Append ( aNewChunk );

    67 		}

    68 		

    69 	TInt FreeSpace ()

    70 		{

    71 		return iFreeSpace;

    72 		}

    73 		

    74 	CChunkManager& ChunkManager ()

    75 		{

    76 		return iChunkManager;

    77 		}

    78 		

    79 private:	

    80 	TInt GrowPool ( TUint aNumBlocks );

    81 	

    82 private:

    83 	TInt						iBlockSize;

    84 	RPointerArray<CMemChunk>	iAllocatedChunks;

    85 	CChunkManager&				iChunkManager;

    86 	RMemCellList				iFreeBlocks;

    87 	RFastLock					iFreeListLock;

    88 	TInt						iFreeSpace;

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

    90 	TInt 						iThresholdValue;

    91 	TInt 						iMinGrowth;

    92 	};

    93 

    94 #endif /*__RCHUNKPOOL_H_*/