posix/sched.h

   1 /* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface.
   2    Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef _SCHED_H
  21 #define _SCHED_H        1
  22
  23 #include <features.h>
  24
  25 /* Get type definitions.  */
  26 #include <bits/types.h>
  27
  28 #define __need_timespec
  29 #include <time.h>
  30
  31 /* Get system specific constant and data structure definitions.  */
  32 #include <bits/sched.h>
  33
  34 __BEGIN_DECLS
  35
  36 /* Set scheduling parameters for a process.  */
  37 extern int __sched_setparam __P ((__pid_t __pid,
  38                                   __const struct sched_param *__param));
  39 extern int sched_setparam __P ((__pid_t __pid,
  40                                 __const struct sched_param *__param));
  41
  42 /* Retrieve scheduling parameters for a particular process.  */
  43 extern int __sched_getparam __P ((__pid_t __pid, struct sched_param *__param));
  44 extern int sched_getparam __P ((__pid_t __pid, struct sched_param *__param));
  45
  46 /* Set scheduling algorithm and/or parameters for a process.  */
  47 extern int __sched_setscheduler __P ((__pid_t __pid, int __policy,
  48                                       __const struct sched_param *__param));
  49 extern int sched_setscheduler __P ((__pid_t __pid, int __policy,
  50                                     __const struct sched_param *__param));
  51
  52 /* Retrieve scheduling algorithm for a particular purpose.  */
  53 extern int __sched_getscheduler __P ((__pid_t __pid));
  54 extern int sched_getscheduler __P ((__pid_t __pid));
  55
  56 /* Yield the processor.  */
  57 extern int __sched_yield __P ((void));
  58 extern int sched_yield __P ((void));
  59
  60 /* Get maximum priority value for a scheduler.  */
  61 extern int __sched_get_priority_max __P ((int __algorithm));
  62 extern int sched_get_priority_max __P ((int __algorithm));
  63
  64 /* Get minimum priority value for a scheduler.  */
  65 extern int __sched_get_priority_min __P ((int __algorithm));
  66 extern int sched_get_priority_min __P ((int __algorithm));
  67
  68 /* Get the SCHED_RR interval for the named process.  */
  69 extern int __sched_rr_get_interval __P ((__pid_t __pid, struct timespec *__t));
  70 extern int sched_rr_get_interval __P ((__pid_t __pid, struct timespec *__t));
  71
  72 __END_DECLS
  73
  74 #endif /* sched.h */