author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 16:34:26 +0300 | |
branch | RCL_3 |
changeset 43 | c1f20ce4abcf |
parent 0 | a41df078684a |
child 44 | 3e88ff8f41d5 |
permissions | -rw-r--r-- |
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Revision: 201035
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// Copyright (c) 2002-2010 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\drivers\usbcc\queue.cpp |
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// Platform independent layer (PIL) of the USB Device controller driver: |
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// Simple singly linked list + its iterator. |
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// |
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// |
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/** |
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@file queue.cpp |
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@internalTechnology |
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*/ |
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#include <drivers/usbc.h> |
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#include "OstTraceDefinitions.h" |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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#ifdef OST_TRACE_COMPILER_IN_USE |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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#include "queueTraces.h" |
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#endif |
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void TSglQueLink::Enque(TSglQueLink* aLink) |
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// |
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// Enque this after aLink. |
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// |
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{ |
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iNext = aLink->iNext; |
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aLink->iNext = this; |
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} |
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TSglQueBase::TSglQueBase(TInt aOffset) |
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// |
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// Constructor |
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// |
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: iHead(NULL), iLast((TSglQueLink*) &iHead), iOffset(aOffset), iElements(0) |
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{ |
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// ESQueOffsetNotAligned |
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__ASSERT_ALWAYS((iOffset % 4 == 0), Kern::Fault(KUsbPILPanicCat, __LINE__)); |
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} |
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void TSglQueBase::DoAddLast(TAny* aPtr) |
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// |
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// Add the object at the end of the queue. |
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// |
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{ |
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TSglQueLink* pL = PtrAdd((TSglQueLink*) aPtr, iOffset); |
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pL->Enque(iLast); |
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iLast = pL; |
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iElements++; |
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__ASSERT_DEBUG((iElements > 0), Kern::Fault(KUsbPILPanicCat, __LINE__)); |
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} |
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void TSglQueBase::DoRemove(TAny* aPtr) |
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// |
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// Remove the object from the queue. |
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// |
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{ |
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TSglQueLink* pP = (TSglQueLink*) (&iHead); |
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TSglQueLink* pL = PtrAdd((TSglQueLink*) aPtr, iOffset); |
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TSglQueLink* pN = pP->iNext; |
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while (pN) |
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{ |
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if (pN == pL) |
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{ |
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pP->iNext = pN->iNext; |
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if (iLast == pL) |
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{ |
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iLast = pP; |
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if (iLast == NULL) |
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iLast = (TSglQueLink*) (&iHead); |
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} |
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iElements--; |
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__ASSERT_DEBUG((iElements >= 0), Kern::Fault(KUsbPILPanicCat, __LINE__)); |
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return; |
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} |
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pP = pN; |
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pN = pP->iNext; |
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} |
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// This doesn't have to indicate an error (but might): |
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Revision: 201035
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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diff
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OstTraceDef0( OST_TRACE_CATEGORY_RND, TRACE_FATAL, TSGLQUEBASE_DOREMOVE, |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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"TSglQueBase::DoRemove: ESQueLinkNotQueued" ); |
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} |
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TSglQueIterBase::TSglQueIterBase(TSglQueBase& aQue) |
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// |
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// Constructor. |
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// |
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: iOffset(aQue.iOffset), iHead(aQue.iHead), iNext(aQue.iHead) |
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{ |
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} |
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void TSglQueIterBase::SetToFirst() |
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// |
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// Start from the beginning of the que. |
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// |
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{ |
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iNext = iHead->iNext; |
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} |
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TAny* TSglQueIterBase::DoPostInc() |
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// |
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// Return the current pointer and increment. |
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// |
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{ |
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TAny* pN = iNext; |
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if (pN == NULL) |
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return NULL; |
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iNext = iNext->iNext; |
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return PtrSub(pN, iOffset); |
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} |
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//--- |