author | hgs |
Fri, 17 Sep 2010 19:25:42 +0530 | |
changeset 67 | a1e347446159 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005-2009 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: Declaration of CMmapMemoryNode |
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* |
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*/ |
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#ifndef MMAP_MEMORY_NODE_H |
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#define MMAP_MEMORY_NODE_H |
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// INCLUDES |
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#include <e32base.h> |
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#include <e32std.h> |
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#include "mmap.h" |
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#include "base.h" |
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// CONSTANTS |
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// MACROS |
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// FORWARD DECLARATIONS |
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class CMmapMemoryNode; |
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// DATA TYPES |
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// FUNCTION PROTOTYPES |
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// CLASS DECLARATION |
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/* |
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* This class is responsible to managing mapped memory nodes. |
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*/ |
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NONSHARABLE_CLASS ( CMmapMemoryNode ): public BBase |
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{ |
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public: |
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/* |
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* constructor. |
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*/ |
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static CMmapMemoryNode * NewL(size_t len, int flag, int shmflg, \ |
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int fildes, off_t offset, int& anErrno, size_t maplen); |
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/* |
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* Default destructor. |
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*/ |
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~CMmapMemoryNode(); |
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/* |
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* Description:Give message length |
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* return:Message length |
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*/ |
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size_t MapLength(); |
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/* |
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* Description:Give message type |
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* return: message type |
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*/ |
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off_t MapFileOffset(); |
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/* |
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* Determine memory data member link offset for single queue |
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*/ |
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static TInt LinkOffset(); |
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/* |
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* Get the file mapped memory address |
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*/ |
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TAny* MappedAddress(); |
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/* |
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* Get the file mapped memory info |
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*/ |
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struct MappedMemory GetMemInfo(); |
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/* |
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* Set the file descriptor base address |
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*/ |
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void SetFdescAddress(void* aAddr); |
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/* |
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* Sync mapped memory to file |
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*/ |
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int SyncMemory(int len, int flags, int& anErrno); |
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private: |
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/* |
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* Default constructor. |
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*/ |
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CMmapMemoryNode(); |
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/* |
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* 2nd phase constructor. |
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*/ |
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int ConstructL(size_t len, int flag, int shmflg, int fildes, \ |
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off_t offset, int& anErrno, size_t maplen); |
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private: // data |
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struct MappedMemory iMapMem; |
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TSglQueLink iLink; |
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}; |
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#endif // MMAP_MEMORY_NODE_H |
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// End of File |