diff -r 000000000000 -r bde4ae8d615e os/kernelhwsrv/kernel/eka/euser/cbase/ub_tque.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/kernelhwsrv/kernel/eka/euser/cbase/ub_tque.cpp	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,133 @@
+// Copyright (c) 2004-2009 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:
+// e32\euser\cbase\ub_tque.cpp
+// 
+//
+
+#include <e32std.h>
+#include <e32std_private.h>
+
+
+
+
+// Class TTickCountQue
+/**
+@internalComponent
+@released
+
+Constructs an empty list header
+*/
+TTickCountQue::TTickCountQue()
+	{}
+
+
+
+
+/**
+@internalComponent
+@released
+
+Adds the specified list element.
+
+The element is added into the list in order of its tick count.
+
+@param aRef The list element to be inserted.
+*/
+void TTickCountQue::Add(TTickCountQueLink& aRef)
+	{
+	TTickCountQueLink* currentLink = (TTickCountQueLink*)(iHead.iNext);
+	TTickCountQueLink* addLink = &aRef;
+
+	while (	(currentLink != (TTickCountQueLink*)&iHead) &&
+			(((TInt)(addLink->iTickCount - currentLink->iTickCount)) >= 0)
+		)
+		{
+		currentLink = (TTickCountQueLink*)currentLink->iNext;
+		}
+
+	addLink->Enque(currentLink->iPrev);
+	}
+
+
+
+
+/**
+@internalComponent
+@released
+
+Removes the first list element from the linked list if its tick count
+is prior to the current tick count.
+
+@param aTickCount The current tick count.
+
+@return A pointer to the element removed from the linked list. This is NULL 
+        if the first element has yet to expire or the queue is empty.
+*/
+TTickCountQueLink* TTickCountQue::RemoveFirst(TUint aTickCount)
+	{
+	TTickCountQueLink* firstLink = (TTickCountQueLink*)iHead.iNext;
+
+	if (((TInt)(firstLink->iTickCount - aTickCount)) <= 0)
+		{
+		return RemoveFirst();
+		}
+	else
+		{
+		return NULL;
+		}
+	}
+
+
+/**
+@internalComponent
+@released
+
+Removes the first list element from the linked list, if any.
+
+@return A pointer to the element removed from the linked list. This is NULL, 
+        if the queue is empty.
+*/
+TTickCountQueLink* TTickCountQue::RemoveFirst()
+	{
+	TTickCountQueLink* firstLink = (TTickCountQueLink*)iHead.iNext;
+
+	if (firstLink != (TTickCountQueLink*)&iHead)
+		{
+		firstLink->Deque();
+		return firstLink;
+		}
+
+	return NULL;
+	}
+
+
+
+
+/**
+@internalComponent
+@released
+
+Gets a pointer to the first list element in the doubly linked list.
+
+@return A pointer to the first list element in the doubly linked list. If 
+        the list is empty, this pointer is not necessarily NULL and must not
+		be assumed to point to a valid object.
+*/
+TTickCountQueLink* TTickCountQue::First() const
+	{
+#if defined (_DEBUG)
+	__DbgTestEmpty();
+#endif
+    return((TTickCountQueLink*)iHead.iNext);
+    }