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v1.5.6
programs/platform.h
218 строк
9 KB
W. Felix Handte
Stop Hardcoding the POSIX Version on BSDs
12 мар 2024, 00:25
12 мар 2024, 00:25
f99a450
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/* * Copyright (c) Meta Platforms, Inc. and affiliates. * All rights reserved. * * This source code is licensed under both the BSD-style license (found in the * LICENSE file in the root directory of this source tree) and the GPLv2 (found * in the COPYING file in the root directory of this source tree). * You may select, at your option, one of the above-listed licenses. */ #ifndef PLATFORM_H_MODULE #define PLATFORM_H_MODULE #if defined (__cplusplus) extern "C" { #endif /* ************************************** * Compiler Options ****************************************/ #if defined(_MSC_VER) # define _CRT_SECURE_NO_WARNINGS /* Disable Visual Studio warning messages for fopen, strncpy, strerror */ # define _CRT_NONSTDC_NO_WARNINGS /* Disable C4996 complaining about posix function names */ # if (_MSC_VER <= 1800) /* 1800 == Visual Studio 2013 */ # define _CRT_SECURE_NO_DEPRECATE /* VS2005 - must be declared before <io.h> and <windows.h> */ # define snprintf sprintf_s /* snprintf unsupported by Visual <= 2013 */ # endif # pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ #endif /* ************************************** * Detect 64-bit OS * https://nadeausoftware.com/articles/2012/02/c_c_tip_how_detect_processor_type_using_compiler_predefined_macros ****************************************/ #if defined __ia64 || defined _M_IA64 /* Intel Itanium */ \ || defined __powerpc64__ || defined __ppc64__ || defined __PPC64__ /* POWER 64-bit */ \ || (defined __sparc && (defined __sparcv9 || defined __sparc_v9__ || defined __arch64__)) || defined __sparc64__ /* SPARC 64-bit */ \ || defined __x86_64__s || defined _M_X64 /* x86 64-bit */ \ || defined __arm64__ || defined __aarch64__ || defined __ARM64_ARCH_8__ /* ARM 64-bit */ \ || (defined __mips && (__mips == 64 || __mips == 4 || __mips == 3)) /* MIPS 64-bit */ \ || defined _LP64 || defined __LP64__ /* NetBSD, OpenBSD */ || defined __64BIT__ /* AIX */ || defined _ADDR64 /* Cray */ \ || (defined __SIZEOF_POINTER__ && __SIZEOF_POINTER__ == 8) /* gcc */ # if !defined(__64BIT__) # define __64BIT__ 1 # endif #endif /* ********************************************************* * Turn on Large Files support (>4GB) for 32-bit Linux/Unix ***********************************************************/ #if !defined(__64BIT__) || defined(__MINGW32__) /* No point defining Large file for 64 bit but MinGW-w64 requires it */ # if !defined(_FILE_OFFSET_BITS) # define _FILE_OFFSET_BITS 64 /* turn off_t into a 64-bit type for ftello, fseeko */ # endif # if !defined(_LARGEFILE_SOURCE) /* obsolete macro, replaced with _FILE_OFFSET_BITS */ # define _LARGEFILE_SOURCE 1 /* Large File Support extension (LFS) - fseeko, ftello */ # endif # if defined(_AIX) || defined(__hpux) # define _LARGE_FILES /* Large file support on 32-bits AIX and HP-UX */ # endif #endif /* ************************************************************ * Detect POSIX version * PLATFORM_POSIX_VERSION = 0 for non-Unix e.g. Windows * PLATFORM_POSIX_VERSION = 1 for Unix-like but non-POSIX * PLATFORM_POSIX_VERSION > 1 is equal to found _POSIX_VERSION * Value of PLATFORM_POSIX_VERSION can be forced on command line ***************************************************************/ #ifndef PLATFORM_POSIX_VERSION # if (defined(__APPLE__) && defined(__MACH__)) || defined(__SVR4) || defined(_AIX) || defined(__hpux) /* POSIX.1-2001 (SUSv3) conformant */ /* exception rule : force posix version to 200112L, * note: it's better to use unistd.h's _POSIX_VERSION whenever possible */ # define PLATFORM_POSIX_VERSION 200112L /* try to determine posix version through official unistd.h's _POSIX_VERSION (https://pubs.opengroup.org/onlinepubs/7908799/xsh/unistd.h.html). * note : there is no simple way to know in advance if <unistd.h> is present or not on target system, * Posix specification mandates its presence and its content, but target system must respect this spec. * It's necessary to _not_ #include <unistd.h> whenever target OS is not unix-like * otherwise it will block preprocessing stage. * The following list of build macros tries to "guess" if target OS is likely unix-like, and therefore can #include <unistd.h> */ # elif !defined(_WIN32) \ && ( defined(__unix__) || defined(__unix) \ || defined(_QNX_SOURCE) || defined(__midipix__) || defined(__VMS) || defined(__HAIKU__) ) # if defined(__linux__) || defined(__linux) || defined(__CYGWIN__) # ifndef _POSIX_C_SOURCE # define _POSIX_C_SOURCE 200809L /* feature test macro : https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html */ # endif # endif # include <unistd.h> /* declares _POSIX_VERSION */ # if defined(_POSIX_VERSION) /* POSIX compliant */ # define PLATFORM_POSIX_VERSION _POSIX_VERSION # else # define PLATFORM_POSIX_VERSION 1 # endif # ifdef __UCLIBC__ # ifndef __USE_MISC # define __USE_MISC /* enable st_mtim on uclibc */ # endif # endif # else /* non-unix target platform (like Windows) */ # define PLATFORM_POSIX_VERSION 0 # endif #endif /* PLATFORM_POSIX_VERSION */ #if PLATFORM_POSIX_VERSION > 1 /* glibc < 2.26 may not expose struct timespec def without this. * See issue #1920. */ # ifndef _ATFILE_SOURCE # define _ATFILE_SOURCE # endif #endif /*-********************************************* * Detect if isatty() and fileno() are available * * Note: Use UTIL_isConsole() for the zstd CLI * instead, as it allows faking is console for * testing. ************************************************/ #if (defined(__linux__) && (PLATFORM_POSIX_VERSION > 1)) \ || (PLATFORM_POSIX_VERSION >= 200112L) \ || defined(__DJGPP__) # include <unistd.h> /* isatty */ # include <stdio.h> /* fileno */ # define IS_CONSOLE(stdStream) isatty(fileno(stdStream)) #elif defined(MSDOS) || defined(OS2) # include <io.h> /* _isatty */ # define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream)) #elif defined(_WIN32) # include <io.h> /* _isatty */ # include <windows.h> /* DeviceIoControl, HANDLE, FSCTL_SET_SPARSE */ # include <stdio.h> /* FILE */ static __inline int IS_CONSOLE(FILE* stdStream) { DWORD dummy; return _isatty(_fileno(stdStream)) && GetConsoleMode((HANDLE)_get_osfhandle(_fileno(stdStream)), &dummy); } #else # define IS_CONSOLE(stdStream) 0 #endif /****************************** * OS-specific IO behaviors ******************************/ #if defined(MSDOS) || defined(OS2) || defined(_WIN32) # include <fcntl.h> /* _O_BINARY */ # include <io.h> /* _setmode, _fileno, _get_osfhandle */ # if !defined(__DJGPP__) # include <windows.h> /* DeviceIoControl, HANDLE, FSCTL_SET_SPARSE */ # include <winioctl.h> /* FSCTL_SET_SPARSE */ # define SET_BINARY_MODE(file) { int const unused=_setmode(_fileno(file), _O_BINARY); (void)unused; } # define SET_SPARSE_FILE_MODE(file) { DWORD dw; DeviceIoControl((HANDLE) _get_osfhandle(_fileno(file)), FSCTL_SET_SPARSE, 0, 0, 0, 0, &dw, 0); } # else # define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY) # define SET_SPARSE_FILE_MODE(file) # endif #else # define SET_BINARY_MODE(file) # define SET_SPARSE_FILE_MODE(file) #endif #ifndef ZSTD_SPARSE_DEFAULT # if (defined(__APPLE__) && defined(__MACH__)) # define ZSTD_SPARSE_DEFAULT 0 # else # define ZSTD_SPARSE_DEFAULT 1 # endif #endif #ifndef ZSTD_START_SYMBOLLIST_FRAME # ifdef __linux__ # define ZSTD_START_SYMBOLLIST_FRAME 2 # elif defined __APPLE__ # define ZSTD_START_SYMBOLLIST_FRAME 4 # else # define ZSTD_START_SYMBOLLIST_FRAME 0 # endif #endif #ifndef ZSTD_SETPRIORITY_SUPPORT /* mandates presence of <sys/resource.h> and support for setpriority() : https://man7.org/linux/man-pages/man2/setpriority.2.html */ # define ZSTD_SETPRIORITY_SUPPORT (PLATFORM_POSIX_VERSION >= 200112L) #endif #ifndef ZSTD_NANOSLEEP_SUPPORT /* mandates support of nanosleep() within <time.h> : https://man7.org/linux/man-pages/man2/nanosleep.2.html */ # if (defined(__linux__) && (PLATFORM_POSIX_VERSION >= 199309L)) \ || (PLATFORM_POSIX_VERSION >= 200112L) # define ZSTD_NANOSLEEP_SUPPORT 1 # else # define ZSTD_NANOSLEEP_SUPPORT 0 # endif #endif #if defined (__cplusplus) } #endif #endif /* PLATFORM_H_MODULE */