diff -r d3e8e7d462dd -r f92a4f87e424 usbmgmt/usbmgr/device/classdrivers/ncm/classimplementation/ncmpktdrv/pktdrv/inc/ncmbuffermanager.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbmgmt/usbmgr/device/classdrivers/ncm/classimplementation/ncmpktdrv/pktdrv/inc/ncmbuffermanager.h	Tue Aug 31 17:01:47 2010 +0300
@@ -0,0 +1,104 @@
+// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "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 NCMBUFFERMANAGER_H
+#define NCMBUFFERMANAGER_H
+
+#include <e32base.h>
+#include "ncmpktdrvcommon.h"
+
+
+
+/**
+Responsible for share chunk buffer managerment
+*/
+
+NONSHARABLE_CLASS(CNcmBufferManager) : public CBase
+
+    {
+public:
+    static CNcmBufferManager* NewL();
+    ~CNcmBufferManager();
+    /**
+    * get a free buffer block
+    *
+    * @param aBuffer to store the buffer block
+    * @return KErrNone        if success
+    *         KErrCongestion  if there is not enough buffer block, should start flow control
+    */
+    TInt GetBuffer(TNcmBuffer& aBuffer);
+    /**
+    * free a buffer block
+    *
+    * @param aBuffer store the buffer block to free
+    */
+    void FreeBuffer(const TNcmBuffer& aBuffer);
+    void InitBufferArea(TAny* aBuf, TInt aLength);
+    /**
+    * get a free buffer block
+    *
+    * @param aSize new ntb size
+    * @return KErrNone        if success
+    *         KErrUnknown  if too big ntb size, can't create enought buffer block
+    */    
+    TInt SetBufferCellSize(TInt aSize);
+    TBool IsCongestion();
+    TInt RequiredBufferCount();	
+    inline void SetAlignSize(TInt aSize);	
+    inline TInt FreeBufferCount();		
+
+private:
+    CNcmBufferManager();
+
+private:
+    /**
+    * array of free buffer blocks 
+    */
+    RArray<TNcmBuffer> iFreeQueue;
+    /**
+    * share chunk LDD buffer area 
+    */
+    TUint8*            iBuf;
+    TInt               iLen;
+    TInt               iCellSize;
+    TInt               iAlignSize;	
+    /**
+    * there is enough buffer blocks or not 
+    */
+    TBool              iIsCongestion;
+    
+    };
+
+inline void CNcmBufferManager::SetAlignSize(TInt aSize)
+    {
+    iAlignSize = aSize;
+    }
+
+inline TInt CNcmBufferManager::FreeBufferCount()
+    {
+    return iFreeQueue.Count();
+    }
+
+
+#endif    //NCMBUFFERMANAGER_H
+