newlib/libc/include/sys/sched.h

   1 /*
   2  *  Written by Joel Sherrill <joel@OARcorp.com>.
   3  *
   4  *  COPYRIGHT (c) 1989-2010.
   5  *  On-Line Applications Research Corporation (OAR).
   6  *
   7  *  Permission to use, copy, modify, and distribute this software for any
   8  *  purpose without fee is hereby granted, provided that this entire notice
   9  *  is included in all copies of any software which is or includes a copy
  10  *  or modification of this software.
  11  *
  12  *  THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
  13  *  WARRANTY.  IN PARTICULAR,  THE AUTHOR MAKES NO REPRESENTATION
  14  *  OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY OF THIS
  15  *  SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
  16  *
  17  *  $Id$
  18  */
  19
  20
  21 #ifndef _SYS_SCHED_H_
  22 #define _SYS_SCHED_H_
  23
  24 #include <sys/_timespec.h>
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 /* Scheduling Policies */
  31 /* Open Group Specifications Issue 6 */
  32 #if defined(__CYGWIN__)
  33 #define SCHED_OTHER    3
  34 #else
  35 #define SCHED_OTHER    0
  36 #endif
  37
  38 #define SCHED_FIFO     1
  39 #define SCHED_RR       2
  40
  41 #if defined(_POSIX_SPORADIC_SERVER)
  42 #define SCHED_SPORADIC 4
  43 #endif
  44
  45 #if __GNU_VISIBLE
  46 #define SCHED_IDLE     5
  47 #define SCHED_BATCH    6
  48
  49 /* Flag to drop realtime policies and negative nice values on fork(). */
  50 #define SCHED_RESET_ON_FORK     0x40000000
  51 #endif
  52
  53 /* Scheduling Parameters */
  54 /* Open Group Specifications Issue 6 */
  55
  56 struct sched_param {
  57   int sched_priority;           /* Process execution scheduling priority */
  58
  59 #if defined(_POSIX_SPORADIC_SERVER) || defined(_POSIX_THREAD_SPORADIC_SERVER)
  60   int sched_ss_low_priority;    /* Low scheduling priority for sporadic */
  61                                 /*   server */
  62   struct timespec sched_ss_repl_period;
  63                                 /* Replenishment period for sporadic server */
  64   struct timespec sched_ss_init_budget;
  65                                /* Initial budget for sporadic server */
  66   int sched_ss_max_repl;       /* Maximum pending replenishments for */
  67                                /* sporadic server */
  68 #endif
  69 };
  70
  71 #ifdef __cplusplus
  72 }
  73 #endif
  74
  75 #endif
  76 /* end of include file */
  77