/*
* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: Declaration of CMmapMemoryNode
*
*/
#ifndef MMAP_MEMORY_NODE_H
#define MMAP_MEMORY_NODE_H
// INCLUDES
#include <e32base.h>
#include <e32std.h>
#include "mmap.h"
#include "base.h"
// CONSTANTS
// MACROS
// FORWARD DECLARATIONS
class CMmapMemoryNode;
// DATA TYPES
// FUNCTION PROTOTYPES
// CLASS DECLARATION
/*
* This class is responsible to managing mapped memory nodes.
*/
NONSHARABLE_CLASS ( CMmapMemoryNode ): public BBase
{
public:
/*
* constructor.
*/
static CMmapMemoryNode * NewL(size_t len, int flag, int shmflg, \
int fildes, off_t offset, int& anErrno, size_t maplen);
/*
* Default destructor.
*/
~CMmapMemoryNode();
/*
* Description:Give message length
* return:Message length
*/
size_t MapLength();
/*
* Description:Give message type
* return: message type
*/
off_t MapFileOffset();
/*
* Determine memory data member link offset for single queue
*/
static TInt LinkOffset();
/*
* Get the file mapped memory address
*/
TAny* MappedAddress();
/*
* Get the file mapped memory info
*/
struct MappedMemory GetMemInfo();
/*
* Set the file descriptor base address
*/
void SetFdescAddress(void* aAddr);
/*
* Sync mapped memory to file
*/
int SyncMemory(int len, int flags, int& anErrno);
private:
/*
* Default constructor.
*/
CMmapMemoryNode();
/*
* 2nd phase constructor.
*/
int ConstructL(size_t len, int flag, int shmflg, int fildes, \
off_t offset, int& anErrno, size_t maplen);
private: // data
struct MappedMemory iMapMem;
TSglQueLink iLink;
};
#endif // MMAP_MEMORY_NODE_H
// End of File