author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 17 Sep 2010 08:37:04 +0300 | |
changeset 266 | 0008ccd16016 |
permissions | -rw-r--r-- |
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// Copyright (c) 2009-2010 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 "ARM EABI LICENCE.txt" |
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// which accompanies this distribution, and is available |
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// in kernel/eka/compsupp. |
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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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// |
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// |
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template<typename T, unsigned N> class TEmergencyBuffer |
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{ |
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public: |
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void Init(); |
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public: |
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void* Alloc(unsigned); |
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void* Free(void*); |
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private: |
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bool iIsOccupied[N]; |
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T iSlots[N]; |
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private: |
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TEmergencyBuffer(); |
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}; |
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template<typename T, unsigned N> inline void TEmergencyBuffer<T,N>::Init() |
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{ |
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for (int i=0; i < N; i++) |
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{ |
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iIsOccupied[i] = 0; |
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} |
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} |
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|
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template<typename T, unsigned N> void* TEmergencyBuffer<T,N>::Alloc(unsigned n) |
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{ |
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if ( n <= sizeof(T) ) |
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{ |
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for (int i=0; i < N; i++) |
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{ |
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bool& isOccupied = iIsOccupied[i]; |
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if ( ! isOccupied ) |
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{ |
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isOccupied = 1; |
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return &iSlots[i]; |
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} |
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} |
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} |
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return NULL; |
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} |
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template<typename T, unsigned N> void* TEmergencyBuffer<T,N>::Free(void* p) |
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{ |
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for (int i=0; i < N; i++) |
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{ |
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const void* bp = &iSlots[i]; |
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bool& isOccupied = iIsOccupied[i]; |
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if ( bp == p && isOccupied ) |
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{ |
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isOccupied = 0; |
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return p; |
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} |
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} |
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return NULL; |
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} |
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