author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:14:51 +0300 | |
branch | RCL_3 |
changeset 59 | 8e5f6eea9c9f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 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 "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: TLS store for singleton objects |
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* |
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*/ |
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#include <glxlog.h> |
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#include <glxpanic.h> |
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|
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// ----------------------------------------------------------------------------- |
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// Return new or existing instance |
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// ----------------------------------------------------------------------------- |
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// |
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template <class T> |
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T* CGlxSingletonStore::InstanceL( T* (*aFactoryFuncL)() ) |
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{ |
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// Get new or existing pointer to store. |
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// InstanceL stores the pointer in TLS |
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CGlxSingletonStore* store = InstanceLC(); |
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|
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// Try to find existing object of type T |
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TInt count = store->iSingletons.Count(); |
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TInt i = 0; |
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T* obj = NULL; |
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while (i < count && !obj) |
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{ |
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obj = dynamic_cast<T*>(store->iSingletons[i].iObject); |
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if (obj) |
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{ |
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// Found an existing object of type T |
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GLX_LOG_INFO1("CGlxSingletonStore::InstanceL, Found existing object %x", obj); |
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// Add another reference |
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store->iSingletons[i].iReferenceCount++; |
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} |
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i++; |
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} |
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|
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// Create new object if one did not exist |
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if ( !obj ) |
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{ |
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// If these calls leave, Cleanup stack will make sure tls |
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// pointer is cleared, if there are no other clients for CGlxSingletonStore |
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// class |
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// Reserve space in the array so that can safely append |
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store->iSingletons.ReserveL( count + 1 ); |
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|
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// Create a new object via provided factory function |
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obj = aFactoryFuncL(); |
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// Give ownership of the new object to store |
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TSingleton singleton; |
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singleton.iObject = obj; |
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singleton.iReferenceCount = 1; |
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store->iSingletons.Append(singleton); |
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GLX_LOG_INFO1 ("CGlxSingletonStore::InstanceL, Created new object %x", obj); |
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} |
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// Remove singleton store from cleanup stack |
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CleanupStack::Pop(store); |
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return obj; |
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} |
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