--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wlan_bearer/wlanldd/wlan_common/osa_common/inc/osachunk.h	Tue Feb 02 02:03:13 2010 +0200
@@ -0,0 +1,129 @@
+/*
+* Copyright (c) 2007-2009 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:   WlanChunk declaration
+*
+*/
+
+/*
+* %version: 6 %
+*/
+
+#ifndef WLANCHUNK_H
+#define WLANCHUNK_H
+
+#include "wlanobject.h"
+
+#include "osalist.h"
+#include "osachunkbase.h"
+
+class RWlanHeap;
+
+/**
+ *  Memory chunk allocation management object.
+ *
+ *  Management of memory is based on buddy system, where righ hand side (rhs)
+ *  and left hand side (lhs) memory links are coalesced (if they are free) to
+ *  the current link to be freed. Allocation size is always alinged to
+ *  allocation unit, which equals to the size of cache line. The pointer
+ *  returned to the caller is also aligned to the allocation unit.
+ *
+ */
+class WlanChunk : 
+    public DBase, public WlanObject, public MWlanOsaChunkBase
+    {
+public:
+
+    /**
+     * ctor
+     * NOTE: call IsValid() member from super class 
+     * to validate object after ctor
+     *
+     * @since S60 v3.2
+     * @param aStartOfBuf start of buffer
+     * @param aEndOfBuf 1 past end of buffer
+     * @param aAllocationUnit allocation unit size in bytes
+     */
+    WlanChunk( TUint8* aStartOfBuf, TUint8* aEndOfBuf, TInt aAllocationUnit );
+
+    /**
+	 * Destructor.
+	 *
+	 * @since S60 v3.2
+	 */
+    virtual ~WlanChunk();
+
+// from base class MWlanOsaChunkBase
+
+    /**
+     * From MWlanOsaChunkBase.
+     * Memory allocation. Correct alignment guaranteed
+     *
+     * @since S60 v3.2
+     * @param aSize size of the buffer to be allocated in bytes. 
+     *              Must be positive otherwise the allocation fails
+     * @param aZeroStamp zero stamp memory or not
+     * @return begin of the allocated memory, NULL upon failure
+     */
+    virtual void* Alloc( TInt aSize, TBool aZeroStamp );
+
+    /**
+     * From MWlanOsaChunkBase.
+     * Releases memory allocated by the Alloc method
+     *
+     * @since S60 v3.2
+     * @param aPtr begin of the buffer to be freed
+     */
+    virtual void Free( void* aPtr );
+
+    /**
+     * From MWlanOsaChunkBase.
+     * Returns the maximum free link size
+     *
+     * @since S60 v3.2
+     * @return maximum free link size
+     */
+    virtual TInt MaxFreeLinkSize() const;
+
+    /**
+     * From MWlanOsaChunkBase.
+     * Evaluates is chunk in use or not, 
+     * meaning is memory allocated from there or not
+     *
+     * @since S60 v3.2
+     * @return ETrue for unused chunk any other for used chunk
+     */
+    virtual TBool IsInUse() const;
+
+    /**
+     * From MWlanOsaChunkBase.
+     * Returns the size of the memory chunk meta header in bytes
+     *
+     * @since S60 v3.2
+     * @return size of the memory chunk meta header
+     */
+    virtual TInt HeaderSize() const;
+    
+
+    // Prohibit copy constructor.
+    WlanChunk( const WlanChunk& );
+    // Prohibit assigment operator.
+    WlanChunk& operator= ( const WlanChunk& );
+
+private: // data
+
+    RWlanHeap* iHeap;
+    
+    };
+
+#endif // WLANCHUNK_H