1 /* 2 * Copyright (c) Meta Platforms, Inc. and affiliates. 3 * All rights reserved. 4 * 5 * This source code is licensed under both the BSD-style license (found in the 6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found 7 * in the COPYING file in the root directory of this source tree). 8 * You may select, at your option, one of the above-listed licenses. 9 */ 10 11 #ifndef PLATFORM_H_MODULE 12 #define PLATFORM_H_MODULE 13 14 /* ************************************** 15 * Compiler Options 16 ****************************************/ 17 #if defined(_MSC_VER) 18 # define _CRT_SECURE_NO_WARNINGS /* Disable Visual Studio warning messages for fopen, strncpy, strerror */ 19 # define _CRT_NONSTDC_NO_WARNINGS /* Disable C4996 complaining about posix function names */ 20 # if (_MSC_VER <= 1800) /* 1800 == Visual Studio 2013 */ 21 # define _CRT_SECURE_NO_DEPRECATE /* VS2005 - must be declared before <io.h> and <windows.h> */ 22 # define snprintf sprintf_s /* snprintf unsupported by Visual <= 2013 */ 23 # endif 24 # pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ 25 #endif 26 27 28 /* ************************************** 29 * Detect 64-bit OS 30 * https://nadeausoftware.com/articles/2012/02/c_c_tip_how_detect_processor_type_using_compiler_predefined_macros 31 ****************************************/ 32 #if defined __ia64 || defined _M_IA64 /* Intel Itanium */ \ 33 || defined __powerpc64__ || defined __ppc64__ || defined __PPC64__ /* POWER 64-bit */ \ 34 || (defined __sparc && (defined __sparcv9 || defined __sparc_v9__ || defined __arch64__)) || defined __sparc64__ /* SPARC 64-bit */ \ 35 || defined __x86_64__ || defined _M_X64 /* x86 64-bit */ \ 36 || defined __arm64__ || defined __aarch64__ || defined __ARM64_ARCH_8__ /* ARM 64-bit */ \ 37 || (defined __mips && (__mips == 64 || __mips == 4 || __mips == 3)) /* MIPS 64-bit */ \ 38 || defined _LP64 || defined __LP64__ /* NetBSD, OpenBSD */ || defined __64BIT__ /* AIX */ || defined _ADDR64 /* Cray */ \ 39 || (defined __SIZEOF_POINTER__ && __SIZEOF_POINTER__ == 8) /* gcc */ 40 # if !defined(__64BIT__) 41 # define __64BIT__ 1 42 # endif 43 #endif 44 45 46 /* ********************************************************* 47 * Turn on Large Files support (>4GB) for 32-bit Linux/Unix 48 ***********************************************************/ 49 #if !defined(__64BIT__) || defined(__MINGW32__) /* No point defining Large file for 64 bit but MinGW-w64 requires it */ 50 # if !defined(_FILE_OFFSET_BITS) 51 # define _FILE_OFFSET_BITS 64 /* turn off_t into a 64-bit type for ftello, fseeko */ 52 # endif 53 # if !defined(_LARGEFILE_SOURCE) /* obsolete macro, replaced with _FILE_OFFSET_BITS */ 54 # define _LARGEFILE_SOURCE 1 /* Large File Support extension (LFS) - fseeko, ftello */ 55 # endif 56 # if defined(_AIX) || defined(__hpux) 57 # define _LARGE_FILES /* Large file support on 32-bits AIX and HP-UX */ 58 # endif 59 #endif 60 61 62 /* ************************************************************ 63 * Detect POSIX version 64 * PLATFORM_POSIX_VERSION = 0 for non-Unix e.g. Windows 65 * PLATFORM_POSIX_VERSION = 1 for Unix-like but non-POSIX 66 * PLATFORM_POSIX_VERSION > 1 is equal to found _POSIX_VERSION 67 * Value of PLATFORM_POSIX_VERSION can be forced on command line 68 ***************************************************************/ 69 #ifndef PLATFORM_POSIX_VERSION 70 71 # if (defined(__APPLE__) && defined(__MACH__)) || defined(__SVR4) || defined(_AIX) || defined(__hpux) /* POSIX.1-2001 (SUSv3) conformant */ 72 /* exception rule : force posix version to 200112L, 73 * note: it's better to use unistd.h's _POSIX_VERSION whenever possible */ 74 # define PLATFORM_POSIX_VERSION 200112L 75 76 /* try to determine posix version through official unistd.h's _POSIX_VERSION (https://pubs.opengroup.org/onlinepubs/7908799/xsh/unistd.h.html). 77 * note : there is no simple way to know in advance if <unistd.h> is present or not on target system, 78 * Posix specification mandates its presence and its content, but target system must respect this spec. 79 * It's necessary to _not_ #include <unistd.h> whenever target OS is not unix-like 80 * otherwise it will block preprocessing stage. 81 * The following list of build macros tries to "guess" if target OS is likely unix-like, and therefore can #include <unistd.h> 82 */ 83 # elif !defined(_WIN32) \ 84 && ( defined(__unix__) || defined(__unix) \ 85 || defined(_QNX_SOURCE) || defined(__midipix__) || defined(__VMS) || defined(__HAIKU__) ) 86 87 # if defined(__linux__) || defined(__linux) || defined(__CYGWIN__) 88 # ifndef _POSIX_C_SOURCE 89 # define _POSIX_C_SOURCE 200809L /* feature test macro : https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html */ 90 # endif 91 # endif 92 # include <unistd.h> /* declares _POSIX_VERSION */ 93 # if defined(_POSIX_VERSION) /* POSIX compliant */ 94 # define PLATFORM_POSIX_VERSION _POSIX_VERSION 95 # else 96 # define PLATFORM_POSIX_VERSION 1 97 # endif 98 99 # ifdef __UCLIBC__ 100 # ifndef __USE_MISC 101 # define __USE_MISC /* enable st_mtim on uclibc */ 102 # endif 103 # endif 104 105 # else /* non-unix target platform (like Windows) */ 106 # define PLATFORM_POSIX_VERSION 0 107 # endif 108 109 #endif /* PLATFORM_POSIX_VERSION */ 110 111 112 #if PLATFORM_POSIX_VERSION > 1 113 /* glibc < 2.26 may not expose struct timespec def without this. 114 * See issue #1920. */ 115 # ifndef _ATFILE_SOURCE 116 # define _ATFILE_SOURCE 117 # endif 118 #endif 119 120 121 /*-********************************************* 122 * Detect if isatty() and fileno() are available 123 * 124 * Note: Use UTIL_isConsole() for the zstd CLI 125 * instead, as it allows faking is console for 126 * testing. 127 ************************************************/ 128 #if (defined(__linux__) && (PLATFORM_POSIX_VERSION > 1)) \ 129 || (PLATFORM_POSIX_VERSION >= 200112L) \ 130 || defined(__DJGPP__) 131 # include <unistd.h> /* isatty */ 132 # include <stdio.h> /* fileno */ 133 # define IS_CONSOLE(stdStream) isatty(fileno(stdStream)) 134 #elif defined(MSDOS) || defined(OS2) 135 # include <io.h> /* _isatty */ 136 # define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream)) 137 #elif defined(_WIN32) 138 # include <io.h> /* _isatty */ 139 # include <windows.h> /* DeviceIoControl, HANDLE, FSCTL_SET_SPARSE */ 140 # include <stdio.h> /* FILE */ 141 142 #if defined (__cplusplus) 143 extern "C" { 144 #endif 145 146 static __inline int IS_CONSOLE(FILE* stdStream) { 147 DWORD dummy; 148 return _isatty(_fileno(stdStream)) && GetConsoleMode((HANDLE)_get_osfhandle(_fileno(stdStream)), &dummy); 149 } 150 151 #if defined (__cplusplus) 152 } 153 #endif 154 155 #else 156 # define IS_CONSOLE(stdStream) 0 157 #endif 158 159 160 /****************************** 161 * OS-specific IO behaviors 162 ******************************/ 163 #if defined(MSDOS) || defined(OS2) || defined(_WIN32) 164 # include <fcntl.h> /* _O_BINARY */ 165 # include <io.h> /* _setmode, _fileno, _get_osfhandle */ 166 # if !defined(__DJGPP__) 167 # include <windows.h> /* DeviceIoControl, HANDLE, FSCTL_SET_SPARSE */ 168 # include <winioctl.h> /* FSCTL_SET_SPARSE */ 169 # define SET_BINARY_MODE(file) { int const unused=_setmode(_fileno(file), _O_BINARY); (void)unused; } 170 # define SET_SPARSE_FILE_MODE(file) { DWORD dw; DeviceIoControl((HANDLE) _get_osfhandle(_fileno(file)), FSCTL_SET_SPARSE, 0, 0, 0, 0, &dw, 0); } 171 # else 172 # define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY) 173 # define SET_SPARSE_FILE_MODE(file) 174 # endif 175 #else 176 # define SET_BINARY_MODE(file) 177 # define SET_SPARSE_FILE_MODE(file) 178 #endif 179 180 181 #ifndef ZSTD_SPARSE_DEFAULT 182 # if (defined(__APPLE__) && defined(__MACH__)) 183 # define ZSTD_SPARSE_DEFAULT 0 184 # else 185 # define ZSTD_SPARSE_DEFAULT 1 186 # endif 187 #endif 188 189 190 #ifndef ZSTD_START_SYMBOLLIST_FRAME 191 # ifdef __linux__ 192 # define ZSTD_START_SYMBOLLIST_FRAME 2 193 # elif defined __APPLE__ 194 # define ZSTD_START_SYMBOLLIST_FRAME 4 195 # else 196 # define ZSTD_START_SYMBOLLIST_FRAME 0 197 # endif 198 #endif 199 200 201 #ifndef ZSTD_SETPRIORITY_SUPPORT 202 /* mandates presence of <sys/resource.h> and support for setpriority() : https://man7.org/linux/man-pages/man2/setpriority.2.html */ 203 # define ZSTD_SETPRIORITY_SUPPORT (PLATFORM_POSIX_VERSION >= 200112L) 204 #endif 205 206 207 #ifndef ZSTD_NANOSLEEP_SUPPORT 208 /* mandates support of nanosleep() within <time.h> : https://man7.org/linux/man-pages/man2/nanosleep.2.html */ 209 # if (defined(__linux__) && (PLATFORM_POSIX_VERSION >= 199309L)) \ 210 || (PLATFORM_POSIX_VERSION >= 200112L) 211 # define ZSTD_NANOSLEEP_SUPPORT 1 212 # else 213 # define ZSTD_NANOSLEEP_SUPPORT 0 214 # endif 215 #endif 216 217 #endif /* PLATFORM_H_MODULE */ 218
Indexes created Mon Jun 29 00:24:49 UTC 2026