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// Copyright (c) 2002-2009 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\include\drivers\usbcque.h
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// Simple singly linked list + its iterator for the USB Device driver.
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//
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//
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/**
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@file usbcque.h
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@internalTechnology
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*/
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#ifndef __USBCQUE_H__
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#define __USBCQUE_H__
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#include <kernel/kernel.h>
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//
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// --- Class definitions ---
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//
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class TSglQueLink
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{
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private:
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void Enque(TSglQueLink* aLink);
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public:
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TSglQueLink* iNext;
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friend class TSglQueBase;
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};
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class TSglQueBase
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{
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protected:
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TSglQueBase(TInt aOffset);
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void DoAddLast(TAny* aPtr);
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void DoRemove(TAny* aPtr);
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protected:
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TSglQueLink* iHead;
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TSglQueLink* iLast;
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TInt iOffset;
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TInt iElements;
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private:
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friend class TSglQueIterBase;
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};
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template<class T>
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class TSglQue : public TSglQueBase
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{
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public:
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inline TSglQue(TInt aOffset);
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inline void AddLast(T& aRef);
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inline void Remove(T& aRef);
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inline TInt Elements() const;
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};
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class TSglQueIterBase
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{
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public:
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void SetToFirst();
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protected:
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TSglQueIterBase(TSglQueBase& aQue);
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TAny* DoPostInc();
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TAny* DoCurrent();
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protected:
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TInt iOffset;
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TSglQueLink*& iHead;
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TSglQueLink* iNext;
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};
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template<class T>
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class TSglQueIter : public TSglQueIterBase
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{
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public:
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inline TSglQueIter(TSglQueBase& aQue);
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inline operator T*();
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inline T* operator++(TInt);
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};
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//
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// --- Inline implementations ---
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//
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// Class TSglQue
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template<class T>
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inline TSglQue<T>::TSglQue(TInt aOffset)
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: TSglQueBase(aOffset)
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{}
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template<class T>
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inline void TSglQue<T>::AddLast(T& aRef)
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{
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DoAddLast(&aRef);
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}
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template<class T>
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inline void TSglQue<T>::Remove(T& aRef)
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{
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DoRemove(&aRef);
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}
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template<class T>
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inline TInt TSglQue<T>::Elements() const
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{
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return iElements;
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}
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// Class TSglQueIter
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template<class T>
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inline TSglQueIter<T>::TSglQueIter(TSglQueBase& aQue)
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: TSglQueIterBase(aQue)
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{}
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template<class T>
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inline TSglQueIter<T>::operator T*()
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{
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return ((T*)DoCurrent());
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}
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template<class T>
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inline T* TSglQueIter<T>::operator++(TInt)
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{
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return ((T*)DoPostInc());
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}
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#endif // __USBCQUE_H__
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