The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/zstd/programs/platform.h

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    1 /*
    2  * Copyright (c) Przemyslaw Skibinski, Yann Collet, Facebook, Inc.
    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 #if defined (__cplusplus)
   15 extern "C" {
   16 #endif
   17 
   18 
   19 
   20 /* **************************************
   21 *  Compiler Options
   22 ****************************************/
   23 #if defined(_MSC_VER)
   24 #  define _CRT_SECURE_NO_WARNINGS    /* Disable Visual Studio warning messages for fopen, strncpy, strerror */
   25 #  define _CRT_NONSTDC_NO_WARNINGS   /* Disable C4996 complaining about posix function names */
   26 #  if (_MSC_VER <= 1800)             /* 1800 == Visual Studio 2013 */
   27 #    define _CRT_SECURE_NO_DEPRECATE /* VS2005 - must be declared before <io.h> and <windows.h> */
   28 #    define snprintf sprintf_s       /* snprintf unsupported by Visual <= 2013 */
   29 #  endif
   30 #  pragma warning(disable : 4127)    /* disable: C4127: conditional expression is constant */
   31 #endif
   32 
   33 
   34 /* **************************************
   35 *  Detect 64-bit OS
   36 *  http://nadeausoftware.com/articles/2012/02/c_c_tip_how_detect_processor_type_using_compiler_predefined_macros
   37 ****************************************/
   38 #if defined __ia64 || defined _M_IA64                                                                               /* Intel Itanium */ \
   39   || defined __powerpc64__ || defined __ppc64__ || defined __PPC64__                                                /* POWER 64-bit */  \
   40   || (defined __sparc && (defined __sparcv9 || defined __sparc_v9__ || defined __arch64__)) || defined __sparc64__  /* SPARC 64-bit */  \
   41   || defined __x86_64__s || defined _M_X64                                                                          /* x86 64-bit */    \
   42   || defined __arm64__ || defined __aarch64__ || defined __ARM64_ARCH_8__                                           /* ARM 64-bit */    \
   43   || (defined __mips  && (__mips == 64 || __mips == 4 || __mips == 3))                                              /* MIPS 64-bit */   \
   44   || defined _LP64 || defined __LP64__ /* NetBSD, OpenBSD */ || defined __64BIT__ /* AIX */ || defined _ADDR64 /* Cray */               \
   45   || (defined __SIZEOF_POINTER__ && __SIZEOF_POINTER__ == 8) /* gcc */
   46 #  if !defined(__64BIT__)
   47 #    define __64BIT__  1
   48 #  endif
   49 #endif
   50 
   51 
   52 /* *********************************************************
   53 *  Turn on Large Files support (>4GB) for 32-bit Linux/Unix
   54 ***********************************************************/
   55 #if !defined(__64BIT__) || defined(__MINGW32__)    /* No point defining Large file for 64 bit but MinGW-w64 requires it */
   56 #  if !defined(_FILE_OFFSET_BITS)
   57 #    define _FILE_OFFSET_BITS 64                   /* turn off_t into a 64-bit type for ftello, fseeko */
   58 #  endif
   59 #  if !defined(_LARGEFILE_SOURCE)                  /* obsolete macro, replaced with _FILE_OFFSET_BITS */
   60 #    define _LARGEFILE_SOURCE 1                    /* Large File Support extension (LFS) - fseeko, ftello */
   61 #  endif
   62 #  if defined(_AIX) || defined(__hpux)
   63 #    define _LARGE_FILES                           /* Large file support on 32-bits AIX and HP-UX */
   64 #  endif
   65 #endif
   66 
   67 
   68 /* ************************************************************
   69 *  Detect POSIX version
   70 *  PLATFORM_POSIX_VERSION = 0 for non-Unix e.g. Windows
   71 *  PLATFORM_POSIX_VERSION = 1 for Unix-like but non-POSIX
   72 *  PLATFORM_POSIX_VERSION > 1 is equal to found _POSIX_VERSION
   73 *  Value of PLATFORM_POSIX_VERSION can be forced on command line
   74 ***************************************************************/
   75 #ifndef PLATFORM_POSIX_VERSION
   76 
   77 #  if (defined(__APPLE__) && defined(__MACH__)) || defined(__SVR4) || defined(_AIX) || defined(__hpux) /* POSIX.1-2001 (SUSv3) conformant */ \
   78      || defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)  /* BSD distros */
   79      /* exception rule : force posix version to 200112L,
   80       * note: it's better to use unistd.h's _POSIX_VERSION whenever possible */
   81 #    define PLATFORM_POSIX_VERSION 200112L
   82 
   83 /* try to determine posix version through official unistd.h's _POSIX_VERSION (http://pubs.opengroup.org/onlinepubs/7908799/xsh/unistd.h.html).
   84  * note : there is no simple way to know in advance if <unistd.h> is present or not on target system,
   85  * Posix specification mandates its presence and its content, but target system must respect this spec.
   86  * It's necessary to _not_ #include <unistd.h> whenever target OS is not unix-like
   87  * otherwise it will block preprocessing stage.
   88  * The following list of build macros tries to "guess" if target OS is likely unix-like, and therefore can #include <unistd.h>
   89  */
   90 #  elif !defined(_WIN32) \
   91      && ( defined(__unix__) || defined(__unix) \
   92        || defined(__midipix__) || defined(__VMS) || defined(__HAIKU__) )
   93 
   94 #    if defined(__linux__) || defined(__linux) || defined(__CYGWIN__)
   95 #      ifndef _POSIX_C_SOURCE
   96 #        define _POSIX_C_SOURCE 200809L  /* feature test macro : https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html */
   97 #      endif
   98 #    endif
   99 #    include <unistd.h>  /* declares _POSIX_VERSION */
  100 #    if defined(_POSIX_VERSION)  /* POSIX compliant */
  101 #      define PLATFORM_POSIX_VERSION _POSIX_VERSION
  102 #    else
  103 #      define PLATFORM_POSIX_VERSION 1
  104 #    endif
  105 
  106 #    ifdef __UCLIBC__
  107 #     ifndef __USE_MISC
  108 #      define __USE_MISC /* enable st_mtim on uclibc */
  109 #     endif
  110 #    endif
  111 
  112 #  else  /* non-unix target platform (like Windows) */
  113 #    define PLATFORM_POSIX_VERSION 0
  114 #  endif
  115 
  116 #endif   /* PLATFORM_POSIX_VERSION */
  117 
  118 
  119 #if PLATFORM_POSIX_VERSION > 1
  120    /* glibc < 2.26 may not expose struct timespec def without this.
  121     * See issue #1920. */
  122 #  ifndef _ATFILE_SOURCE
  123 #    define _ATFILE_SOURCE
  124 #  endif
  125 #endif
  126 
  127 
  128 /*-*********************************************
  129 *  Detect if isatty() and fileno() are available
  130 ************************************************/
  131 #if (defined(__linux__) && (PLATFORM_POSIX_VERSION > 1)) \
  132  || (PLATFORM_POSIX_VERSION >= 200112L) \
  133  || defined(__DJGPP__)
  134 #  include <unistd.h>   /* isatty */
  135 #  include <stdio.h>    /* fileno */
  136 #  define IS_CONSOLE(stdStream) isatty(fileno(stdStream))
  137 #elif defined(MSDOS) || defined(OS2)
  138 #  include <io.h>       /* _isatty */
  139 #  define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
  140 #elif defined(WIN32) || defined(_WIN32)
  141 #  include <io.h>      /* _isatty */
  142 #  include <windows.h> /* DeviceIoControl, HANDLE, FSCTL_SET_SPARSE */
  143 #  include <stdio.h>   /* FILE */
  144 static __inline int IS_CONSOLE(FILE* stdStream) {
  145     DWORD dummy;
  146     return _isatty(_fileno(stdStream)) && GetConsoleMode((HANDLE)_get_osfhandle(_fileno(stdStream)), &dummy);
  147 }
  148 #else
  149 #  define IS_CONSOLE(stdStream) 0
  150 #endif
  151 
  152 
  153 /******************************
  154 *  OS-specific IO behaviors
  155 ******************************/
  156 #if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32)
  157 #  include <fcntl.h>   /* _O_BINARY */
  158 #  include <io.h>      /* _setmode, _fileno, _get_osfhandle */
  159 #  if !defined(__DJGPP__)
  160 #    include <windows.h> /* DeviceIoControl, HANDLE, FSCTL_SET_SPARSE */
  161 #    include <winioctl.h> /* FSCTL_SET_SPARSE */
  162 #    define SET_BINARY_MODE(file) { int const unused=_setmode(_fileno(file), _O_BINARY); (void)unused; }
  163 #    define SET_SPARSE_FILE_MODE(file) { DWORD dw; DeviceIoControl((HANDLE) _get_osfhandle(_fileno(file)), FSCTL_SET_SPARSE, 0, 0, 0, 0, &dw, 0); }
  164 #  else
  165 #    define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
  166 #    define SET_SPARSE_FILE_MODE(file)
  167 #  endif
  168 #else
  169 #  define SET_BINARY_MODE(file)
  170 #  define SET_SPARSE_FILE_MODE(file)
  171 #endif
  172 
  173 
  174 #ifndef ZSTD_SPARSE_DEFAULT
  175 #  if (defined(__APPLE__) && defined(__MACH__))
  176 #    define ZSTD_SPARSE_DEFAULT 0
  177 #  else
  178 #    define ZSTD_SPARSE_DEFAULT 1
  179 #  endif
  180 #endif
  181 
  182 
  183 #ifndef ZSTD_START_SYMBOLLIST_FRAME
  184 #  ifdef __linux__
  185 #    define ZSTD_START_SYMBOLLIST_FRAME 2
  186 #  elif defined __APPLE__
  187 #    define ZSTD_START_SYMBOLLIST_FRAME 4
  188 #  else
  189 #    define ZSTD_START_SYMBOLLIST_FRAME 0
  190 #  endif
  191 #endif
  192 
  193 
  194 #ifndef ZSTD_SETPRIORITY_SUPPORT
  195    /* mandates presence of <sys/resource.h> and support for setpriority() : http://man7.org/linux/man-pages/man2/setpriority.2.html */
  196 #  define ZSTD_SETPRIORITY_SUPPORT (PLATFORM_POSIX_VERSION >= 200112L)
  197 #endif
  198 
  199 
  200 #ifndef ZSTD_NANOSLEEP_SUPPORT
  201    /* mandates support of nanosleep() within <time.h> : http://man7.org/linux/man-pages/man2/nanosleep.2.html */
  202 #  if (defined(__linux__) && (PLATFORM_POSIX_VERSION >= 199309L)) \
  203    || (PLATFORM_POSIX_VERSION >= 200112L)
  204 #     define ZSTD_NANOSLEEP_SUPPORT 1
  205 #  else
  206 #     define ZSTD_NANOSLEEP_SUPPORT 0
  207 #  endif
  208 #endif
  209 
  210 
  211 #if defined (__cplusplus)
  212 }
  213 #endif
  214 
  215 #endif /* PLATFORM_H_MODULE */

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