1 /*

     2 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 #if !defined(__MEMMAPUTILS_H__)

    20 #define __MEMMAPUTILS_H__

    21 

    22 #ifdef WIN32

    23 #include <windows.h>

    24 #include <io.h>

    25 #endif

    26 

    27 #include <fcntl.h>

    28 #include <sys/types.h>

    29 #include <sys/stat.h>

    30 #include <stdio.h>

    31 #include <string>

    32 #include <fstream>

    33 

    34 #include "h_utl.h"

    35 

    36 typedef std::string String;

    37 typedef std::ofstream Ofstream;

    38 

    39 const int KStatTrue = 1;

    40 const int KStatFalse = 0;

    41 

    42 /** 

    43 class MemmapUtils

    44 

    45 @internalComponent

    46 @released

    47 */

    48 class MemmapUtils

    49 {

    50 private:

    51 	// Memory map file descriptor

    52 	int iHFile;

    53 

    54 #ifdef WIN32

    55 	// Windows specific Memory map object handle

    56 	HANDLE iHMMFile;

    57 #endif

    58 	// Map file name

    59 	String iMapFileName;

    60 

    61 public:

    62 	MemmapUtils();

    63 	~MemmapUtils();

    64 

    65 	// Generate temporary file name

    66 	void GetMapFileName(String& aFile);

    67 

    68 	// Create the memory map

    69 	void* OpenMemMapPointer(unsigned long aOffset, unsigned long aSize);

    70 	// Close the memory map

    71 	int CloseMemMapPointer(void* aData, unsigned long aSize);

    72 	// Open the file for memory mapping

    73 	int OpenMapFile();

    74 	// Close the memory mapped file

    75 	void CloseMapFile();

    76 	// Delete the memory mapped file

    77 	void DeleteMapFile();

    78 

    79 	int IsMapFileOpen();

    80 

    81 	// Windows specific file mapping object

    82 	int CreateFileMapObject(unsigned long aSize);

    83 	void CloseFileMapObject();

    84 };

    85 

    86 #endif //__MEMMAPUTILS_H__