author | yiluzhu |
Tue, 26 Jan 2010 14:49:20 +0000 (2010-01-26) | |
branch | wip |
changeset 322 | a4bc95a3b539 |
parent 0 | 044383f39525 |
child 590 | 360bd6b35136 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2009 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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* Cluster class for FileSystem component |
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* @internalComponent |
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* @released |
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* |
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*/ |
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#ifndef CLUSTER_H |
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#define CLUSTER_H |
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#include "errorhandler.h" |
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#include "directory.h" |
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typedef std::multimap <unsigned int,unsigned int> TClustersPerEntryMap; |
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/* |
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* This class is used by classes CDirRegion and CLongName. This class describes |
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* the basic Data members and Member functions related to cluster number |
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* allocation and FAT input map creation. |
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* |
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* @internalComponent |
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* @released |
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*/ |
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class CCluster |
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{ |
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public: |
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static CCluster* Instance (unsigned int aClusterSize, |
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unsigned int aTotalNumberOfClusters); |
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unsigned int GetCurrentClusterNumber() const; |
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void DecrementCurrentClusterNumber(); |
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unsigned short int GetHighWordClusterNumber() const; |
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unsigned short int GetLowWordClusterNumber() const; |
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void CreateMap(unsigned int aStartingClusterNumber,unsigned int aPairClusterNumber); |
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TClustersPerEntryMap* GetClustersPerEntryMap(); |
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void UpdateNextAvailableClusterNumber(); |
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unsigned int GetClusterSize() const; |
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~CCluster (); |
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private: |
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CCluster(unsigned int aClusterSize, |
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unsigned int aTotalNumberOfClusters); |
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static CCluster* iClusterInstance; |
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unsigned long int iClusterSize; |
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unsigned int iRootClusterNumber; |
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unsigned int iCurrentClusterNumber; |
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unsigned int iTotalNumberOfClusters; |
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/* used to store the mapping of Starting cluster and Number's of |
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* clusters occupied by the specific entry |
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*/ |
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TClustersPerEntryMap iClustersPerEntry; |
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}; |
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#endif //CLUSTER_H |