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// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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//
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/**
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@file
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@internalComponent
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*/
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#ifndef NCMBUFFERMANAGER_H
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#define NCMBUFFERMANAGER_H
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#include <e32base.h>
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#include "ncmpktdrvcommon.h"
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/**
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Responsible for share chunk buffer managerment
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*/
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NONSHARABLE_CLASS(CNcmBufferManager) : public CBase
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{
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public:
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static CNcmBufferManager* NewL();
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~CNcmBufferManager();
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/**
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* get a free buffer block
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*
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* @param aBuffer to store the buffer block
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* @return KErrNone if success
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* KErrCongestion if there is not enough buffer block, should start flow control
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*/
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TInt GetBuffer(TNcmBuffer& aBuffer);
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/**
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* free a buffer block
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*
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* @param aBuffer store the buffer block to free
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*/
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void FreeBuffer(const TNcmBuffer& aBuffer);
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void InitBufferArea(TAny* aBuf, TInt aLength);
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/**
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* get a free buffer block
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*
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* @param aSize new ntb size
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* @return KErrNone if success
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* KErrUnknown if too big ntb size, can't create enought buffer block
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*/
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TInt SetBufferCellSize(TInt aSize);
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TBool IsCongestion();
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TInt RequiredBufferCount();
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inline void SetAlignSize(TInt aSize);
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inline TInt FreeBufferCount();
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private:
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CNcmBufferManager();
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private:
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/**
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* array of free buffer blocks
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*/
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RArray<TNcmBuffer> iFreeQueue;
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/**
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* share chunk LDD buffer area
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*/
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TUint8* iBuf;
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TInt iLen;
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TInt iCellSize;
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TInt iAlignSize;
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/**
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* there is enough buffer blocks or not
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*/
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TBool iIsCongestion;
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};
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inline void CNcmBufferManager::SetAlignSize(TInt aSize)
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{
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iAlignSize = aSize;
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}
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inline TInt CNcmBufferManager::FreeBufferCount()
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{
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return iFreeQueue.Count();
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}
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#endif //NCMBUFFERMANAGER_H
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