| author | sl |
| Tue, 10 Jun 2014 14:32:02 +0200 | |
| changeset 1 | 260cb5ec6c19 |
| permissions | -rw-r--r-- |
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// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of the License "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// e32\euser\cbase\ub_tque.cpp |
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// |
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// |
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|
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#include <e32std.h> |
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#include <e32std_private.h> |
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// Class TTickCountQue |
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/** |
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@internalComponent |
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@released |
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|
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Constructs an empty list header |
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*/ |
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TTickCountQue::TTickCountQue() |
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{}
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/** |
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@internalComponent |
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@released |
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Adds the specified list element. |
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The element is added into the list in order of its tick count. |
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@param aRef The list element to be inserted. |
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*/ |
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void TTickCountQue::Add(TTickCountQueLink& aRef) |
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{
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TTickCountQueLink* currentLink = (TTickCountQueLink*)(iHead.iNext); |
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TTickCountQueLink* addLink = &aRef; |
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|
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while ( (currentLink != (TTickCountQueLink*)&iHead) && |
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(((TInt)(addLink->iTickCount - currentLink->iTickCount)) >= 0) |
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) |
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{
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currentLink = (TTickCountQueLink*)currentLink->iNext; |
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} |
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addLink->Enque(currentLink->iPrev); |
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} |
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/** |
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@internalComponent |
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@released |
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Removes the first list element from the linked list if its tick count |
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is prior to the current tick count. |
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@param aTickCount The current tick count. |
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@return A pointer to the element removed from the linked list. This is NULL |
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if the first element has yet to expire or the queue is empty. |
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*/ |
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TTickCountQueLink* TTickCountQue::RemoveFirst(TUint aTickCount) |
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{
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TTickCountQueLink* firstLink = (TTickCountQueLink*)iHead.iNext; |
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|
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if (((TInt)(firstLink->iTickCount - aTickCount)) <= 0) |
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{
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return RemoveFirst(); |
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} |
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else |
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{
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return NULL; |
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} |
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} |
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/** |
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@internalComponent |
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@released |
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Removes the first list element from the linked list, if any. |
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@return A pointer to the element removed from the linked list. This is NULL, |
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if the queue is empty. |
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*/ |
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TTickCountQueLink* TTickCountQue::RemoveFirst() |
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{
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TTickCountQueLink* firstLink = (TTickCountQueLink*)iHead.iNext; |
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if (firstLink != (TTickCountQueLink*)&iHead) |
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{
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firstLink->Deque(); |
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return firstLink; |
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} |
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return NULL; |
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} |
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/** |
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@internalComponent |
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@released |
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Gets a pointer to the first list element in the doubly linked list. |
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@return A pointer to the first list element in the doubly linked list. If |
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the list is empty, this pointer is not necessarily NULL and must not |
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be assumed to point to a valid object. |
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*/ |
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TTickCountQueLink* TTickCountQue::First() const |
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{
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#if defined (_DEBUG) |
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__DbgTestEmpty(); |
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#endif |
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return((TTickCountQueLink*)iHead.iNext); |
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} |