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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);
     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