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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 ******************************************************************************
5 *
6 *   Copyright (C) 1999-2011, International Business Machines
7 *   Corporation and others.  All Rights Reserved.
8 *
9 ******************************************************************************/
10 
11 /*----------------------------------------------------------------------------------
12  *
13  *       Memory mapped file wrappers for use by the ICU Data Implementation
14  *
15  *           Porting note:  The implementation of these functions is very platform specific.
16  *             Not all platforms can do real memory mapping.  Those that can't
17  *             still must implement these functions, getting the data into memory using
18  *             whatever means are available.
19  *
20  *            These functions are part of the ICU internal implementation, and
21  *            are not inteded to be used directly by applications.
22  *
23  *----------------------------------------------------------------------------------*/
24 
25 #ifndef __UMAPFILE_H__
26 #define __UMAPFILE_H__
27 
28 #include "unicode/putil.h"
29 #include "unicode/udata.h"
30 #include "putilimp.h"
31 
32 U_CFUNC UBool uprv_mapFile(UDataMemory *pdm, const char *path, UErrorCode *status);
33 U_CFUNC void  uprv_unmapFile(UDataMemory *pData);
34 
35 /* MAP_NONE: no memory mapping, no file access at all */
36 #define MAP_NONE        0
37 #define MAP_WIN32       1
38 #define MAP_POSIX       2
39 #define MAP_STDIO       3
40 #define MAP_390DLL      4
41 
42 #if UCONFIG_NO_FILE_IO
43 #   define MAP_IMPLEMENTATION MAP_NONE
44 #elif U_PLATFORM_USES_ONLY_WIN32_API
45 #   define MAP_IMPLEMENTATION MAP_WIN32
46 #elif U_HAVE_MMAP || U_PLATFORM == U_PF_OS390
47 #   if U_PLATFORM == U_PF_OS390 && defined (OS390_STUBDATA)
48         /*   No memory mapping for 390 batch mode.  Fake it using dll loading.  */
49 #       define MAP_IMPLEMENTATION MAP_390DLL
50 #   else
51 #       define MAP_IMPLEMENTATION MAP_POSIX
52 #   endif
53 #else /* unknown platform, no memory map implementation: use stdio.h and uprv_malloc() instead */
54 #   define MAP_IMPLEMENTATION MAP_STDIO
55 #endif
56 
57 #endif
58