posix/sched.h

   1 /* Definitions for POSIX 1003.1b-1993 (aka POSIX.4) scheduling interface.
   2 Copyright (C) 1996 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
  17 not, 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 <gnu/types.h>
  27 #include <sys/time.h>           /* for struct timespec */
  28
  29 /* Get system specific constant and data structure definitions.  */
  30 #include <schedbits.h>
  31
  32 __BEGIN_DECLS
  33
  34 /* Set scheduling parameters for a process.  */
  35 extern int __sched_setparam __P ((__pid_t __pid,
  36                                   __const struct sched_param *__param));
  37 extern int sched_setparam __P ((__pid_t __pid,
  38                                 __const struct sched_param *__param));
  39
  40 /* Retrieve scheduling parameters for a particular process.  */
  41 extern int __sched_getparam __P ((__pid_t __pid, struct sched_param *__param));
  42 extern int sched_getparam __P ((__pid_t __pid, struct sched_param *__param));
  43
  44 /* Set scheduling algorithm and/or parameters for a process.  */
  45 extern int __sched_setscheduler __P ((__pid_t __pid, int __policy,
  46                                       __const struct sched_param *__param));
  47 extern int sched_setscheduler __P ((__pid_t __pid, int __policy,
  48                                     __const struct sched_param *__param));
  49
  50 /* Retrieve scheduling algorithm for a particular purpose.  */
  51 extern int __sched_getscheduler __P ((__pid_t __pid));
  52 extern int sched_getscheduler __P ((__pid_t __pid));
  53
  54 /* Yield the processor.  */
  55 extern int __sched_yield __P ((void));
  56 extern int sched_yield __P ((void));
  57
  58 /* Get maximum priority value for a scheduler.  */
  59 extern int __sched_get_priority_max __P ((int __algorithm));
  60 extern int sched_get_priority_max __P ((int __algorithm));
  61
  62 /* Get minimum priority value for a scheduler.  */
  63 extern int __sched_get_priority_min __P ((int __algorithm));
  64 extern int sched_get_priority_min __P ((int __algorithm));
  65
  66 /* Get the SCHED_RR interval for the named process.  */
  67 extern int __sched_rr_get_interval __P ((__pid_t __pid, struct timespec *__t));
  68 extern int sched_rr_get_interval __P ((__pid_t __pid, struct timespec *__t));
  69
  70 __END_DECLS
  71
  72 #endif /* sched.h */