umapfile.h (1977B)
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 intended 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_CAPI UBool U_EXPORT2 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 41 #if UCONFIG_NO_FILE_IO 42 # define MAP_IMPLEMENTATION MAP_NONE 43 #elif defined(__wasi__) 44 # define MAP_IMPLEMENTATION MAP_STDIO 45 #elif U_PLATFORM_USES_ONLY_WIN32_API 46 # define MAP_IMPLEMENTATION MAP_WIN32 47 #elif U_HAVE_MMAP || U_PLATFORM == U_PF_OS390 48 # define MAP_IMPLEMENTATION MAP_POSIX 49 #else /* unknown platform, no memory map implementation: use stdio.h and uprv_malloc() instead */ 50 # define MAP_IMPLEMENTATION MAP_STDIO 51 #endif 52 53 #endif