include/sched.h

   1 /* sched.h: scheduler interface for Cygwin
   2
   3    Copyright 2001  Red Hat, Inc.
   4
   5    Written by Robert Collins <rbtcollins@hotmail.com>
   6
   7    This file is part of Cygwin.
   8
   9    This software is a copyrighted work licensed under the terms of the
  10    Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
  11    details. */
  12
  13 /* Written from the opengroup specifications */
  14
  15 #ifndef _SCHED_H
  16 #define _SCHED_H
  17 #include <time.h>
  18
  19 /* we return -1 and set errno on failure */
  20 #define SCHED_FIFO  1
  21 #define SCHED_RR    2
  22 #define SCHED_OTHER 3
  23
  24 struct sched_param
  25 {
  26   int sched_priority;
  27 };
  28
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 /* max priority for policy */
  34 int sched_get_priority_max (int);
  35 /* min priority for policy */
  36 int sched_get_priority_min (int);
  37 /* get sched params for process */
  38 int sched_getparam (pid_t, struct sched_param *);
  39 /* get the scheduler for pid */
  40 int sched_getscheduler (pid_t);
  41 /* get the time quantum for pid */
  42 int sched_rr_get_interval (pid_t, struct timespec *);
  43 /* set the scheduling parameters */
  44 int sched_setparam (pid_t, const struct sched_param *);
  45 /* set the scheduler */
  46 int sched_setscheduler (pid_t, int, const struct sched_param *);
  47 /* yield the cpu */
  48 int sched_yield (void);
  49
  50 #if defined(__INSIDE_CYGWIN__) || defined(__INSIDE_MSYS__)
  51 /* These are private helper functions used to calculate scheduler settings and
  52  * validate parameters */
  53
  54 /* check parameters for validity */
  55 int valid_sched_parameters(const struct sched_param *);
  56 /* set a single thread's priority */
  57 int sched_set_thread_priority(HANDLE thread, int priority);
  58
  59 #endif /* __INSIDE_CYGWIN__ || __INSIDE_MSYS__*/
  60
  61 #ifdef __cplusplus
  62 }
  63 #endif
  64 #endif                          /* _SCHED_H */