--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servicediscoveryandcontrol/pnp/test/upnp/chunkmgr/src/cmemchunk.cpp	Tue Feb 02 01:12:20 2010 +0200
@@ -0,0 +1,179 @@
+// 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
+// 
+//
+
+#include <e32base.h>
+#include "cchunkallocator.h"
+#include "rmemcell.h"
+#include "cmemchunk.h"
+
+#define MASK 0x03
+#define WORD_ALIGN(x) ( ( ( (x) + (MASK) )& ~MASK ) ) // aligns 'x' to the nearest word size
+#define IS_WORD_ALIGNED(x) ( ( (TUint32)(x) & MASK ) == 0 )
+
+
+CMemChunk* CMemChunk::New ( CChunkAllocator& aAllocator, RChunkPool& aChunkPool, TInt aNumBlocks , TInt aBlockSize )
+	{
+	// allocates chunk on shared Heap using ::new operator
+	
+	// round of RMemCell & aBlockSize to the nearest word size.
+	TInt memCellSize = WORD_ALIGN ( sizeof ( RMemCell ) );
+	TInt blockSize = WORD_ALIGN ( aBlockSize );
+	
+	CMemChunk* chunk = new ( aNumBlocks * ( memCellSize + blockSize ), aAllocator ) CMemChunk ( aAllocator, aNumBlocks );
+	
+	// In the complete memory allocated on shared heap; first bytes are of CMemChunk,
+	// then start the memory required for RMemCell * NumBlocks and at the end contains
+	// the actual data buffer.
+	
+	if ( chunk != NULL )
+		{
+		// memory required for CMemChunk and for its parameters storage
+		TUint8* chunkSize = ( ( TUint8* ) chunk ) + sizeof ( CMemChunk );
+	 	__ASSERT_DEBUG ( IS_WORD_ALIGNED ( chunkSize ), User::Invariant () ); // TODO Proper panic code
+		
+	 	// memory required for RMemCell and its parameters storage
+		TUint8* dataBufStart = chunkSize + ( aNumBlocks * memCellSize );
+		
+		// now place each RMemCell and its databuffer in the address specified
+		for ( TInt i = 0; i < aNumBlocks ; i++ )
+			{
+			// address assigned for RMemCell 'i'
+			RMemCell* hdr = ( RMemCell* ) ( chunkSize + i * memCellSize );
+			
+			// overloaded ::new, that makes in-place allocation of MemCell at specified address
+			( void ) new ( hdr ) RMemCell ( &aChunkPool, dataBufStart + ( i * aBlockSize ), aBlockSize );
+			
+			// completed construction of a RMemCell.
+			chunk->iQueue.Append ( hdr );
+			}
+		}
+	
+	return chunk;
+	}
+
+CMemChunk::CMemChunk ( CChunkAllocator& aAllocator, TInt aNumBlocks )
+	: iChunkAllocator ( aAllocator ), iNumBlocks ( aNumBlocks )
+	{
+	}
+
+CMemChunk::~CMemChunk ()
+	{	
+	}
+
+TAny* CMemChunk::operator new ( TUint aSize, TInt aExtra, CChunkAllocator& aAllocator )
+	{
+	return aAllocator.Alloc ( aSize + aExtra );
+	}
+
+void CMemChunk::operator delete ( TAny* aPtr, TInt /*aExtra*/, CChunkAllocator& /*aAllocator*/ )
+	{
+	CMemChunk::operator delete ( aPtr );
+	}
+
+void CMemChunk::operator delete ( TAny* aPtr )
+	{
+	if ( aPtr )
+		{
+		( ( CMemChunk* ) aPtr )->iChunkAllocator.Free ( aPtr );
+		}
+	}
+
+void RMemCellList::Append ( RMemCell* aPtr )
+	{
+	if ( IsEmpty () )	
+		{
+		iNext = iLast = aPtr;
+		}
+	else
+		{
+		iLast->Link ( aPtr );
+		iLast = aPtr;
+		}
+	}
+	
+void RMemCellList::Append ( RMemCellList& aList )
+	{
+	if ( aList.IsEmpty () )
+		{
+		return;
+		}
+	
+	if ( this->IsEmpty () )
+		{
+		iNext = aList.First ();
+		iLast = aList.Last ();		
+		}
+	else
+		{
+		iLast->Link ( aList.First () );
+		iLast = aList.Last ();
+		}
+	aList.Init ();
+	}
+	
+TInt RMemCellList::Transfer ( RMemCellList& aList, TInt aSize )
+	{
+	__ASSERT_DEBUG ( aSize >= 0, User::Invariant () ); //TODO
+	TInt transferedBytes = 0;
+	
+	if ( !IsEmpty () )
+		{
+		RMemCell* first;
+		RMemCell* next;
+		RMemCell* last;
+		
+		// catch hold of first link
+		first = iNext;
+		next = first;
+		last = first;
+		
+		while ( aSize >= 0 && next != NULL )
+			{
+			transferedBytes += next->Size ();
+			aSize -= next->Size ();
+			
+			last = next;
+			
+			next = next->Next ();
+			
+			if ( aSize == 0 )
+				{
+				break;
+				}
+			}
+		last->SetLength(aSize + last->Size());
+		
+		if ( next == NULL ) // all the blocks are transfferred
+			{
+			Init ();
+			}
+		else 				// still left with more blocks, so adjust the start & End links
+			{
+			last->Link ( NULL );
+			iNext = next;
+			}
+		
+		// now the last link is ready to use
+		RMemCellList newList ( first, last );
+		aList.Append ( newList );
+		}
+	
+	return transferedBytes;
+	}
+
+