lib/sched.in.h

   1 /* A GNU-like <sched.h>.
   2    Copyright (C) 2008-2024 Free Software Foundation, Inc.
   3
   4    This file is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as
   6    published by the Free Software Foundation; either version 2.1 of the
   7    License, or (at your option) any later version.
   8
   9    This file is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #ifndef _@GUARD_PREFIX@_SCHED_H
  18
  19 #if __GNUC__ >= 3
  20 @PRAGMA_SYSTEM_HEADER@
  21 #endif
  22 @PRAGMA_COLUMNS@
  23
  24 /* This file uses #include_next of a system file that defines time_t.
  25    For the 'year2038' module to work right, <config.h> needs to have been
  26    included before.  */
  27 #if !_GL_CONFIG_H_INCLUDED
  28  #error "Please include config.h first."
  29 #endif
  30
  31 /* The include_next requires a split double-inclusion guard.  */
  32 #if @HAVE_SCHED_H@
  33 # if @HAVE_SYS_CDEFS_H@
  34 #  include <sys/cdefs.h>
  35 # endif
  36 # @INCLUDE_NEXT@ @NEXT_SCHED_H@
  37 #endif
  38
  39 #ifndef _@GUARD_PREFIX@_SCHED_H
  40 #define _@GUARD_PREFIX@_SCHED_H
  41
  42 /* This file uses GNULIB_POSIXCHECK, HAVE_RAW_DECL_*.  */
  43 #if !_GL_CONFIG_H_INCLUDED
  44  #error "Please include config.h first."
  45 #endif
  46
  47 /* Get pid_t.
  48    This is needed on glibc 2.11 (see
  49    glibc bug <https://sourceware.org/bugzilla/show_bug.cgi?id=13198>)
  50    and Mac OS X 10.5.  */
  51 #include <sys/types.h>
  52
  53 #ifdef __KLIBC__
  54 /* On OS/2 kLIBC, struct sched_param is in spawn.h.  */
  55 # include <spawn.h>
  56 #endif
  57
  58 #ifdef __VMS
  59 /* On OpenVMS, struct sched_param is in <pthread.h>.  */
  60 # include <pthread.h>
  61 #endif
  62
  63 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
  64
  65 /* The definition of _GL_WARN_ON_USE is copied here.  */
  66
  67 #if !@HAVE_STRUCT_SCHED_PARAM@
  68
  69 # if !GNULIB_defined_struct_sched_param
  70 struct sched_param
  71 {
  72   int sched_priority;
  73 };
  74 #  define GNULIB_defined_struct_sched_param 1
  75 # endif
  76
  77 #endif
  78
  79 #if !(defined SCHED_FIFO && defined SCHED_RR && defined SCHED_OTHER)
  80 # define SCHED_FIFO   1
  81 # define SCHED_RR     2
  82 # define SCHED_OTHER  0
  83 #endif
  84
  85 #if @GNULIB_SCHED_YIELD@
  86 # if @REPLACE_SCHED_YIELD@
  87 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
  88 #   undef sched_yield
  89 #   define sched_yield rpl_sched_yield
  90 #  endif
  91 _GL_FUNCDECL_RPL (sched_yield, int, (void));
  92 _GL_CXXALIAS_RPL (sched_yield, int, (void));
  93 # else
  94 #  if !@HAVE_SCHED_YIELD@
  95 _GL_FUNCDECL_SYS (sched_yield, int, (void));
  96 #  endif
  97 _GL_CXXALIAS_SYS (sched_yield, int, (void));
  98 # endif
  99 # if __GLIBC__ >= 2
 100 _GL_CXXALIASWARN (sched_yield);
 101 # endif
 102 #elif defined GNULIB_POSIXCHECK
 103 # undef sched_yield
 104 # if HAVE_RAW_DECL_SCHED_YIELD
 105 _GL_WARN_ON_USE (sched_yield, "sched_yield is not portable - "
 106                  "use gnulib module sched_yield for portability");
 107 # endif
 108 #endif
 109
 110 #endif /* _@GUARD_PREFIX@_SCHED_H */
 111 #endif /* _@GUARD_PREFIX@_SCHED_H */