--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/euser/cbase/ub_tque.cpp Mon Oct 19 15:55:17 2009 +0100
@@ -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);
+ }