sys/sys/sched.h

   1 #ifndef _SCHED_H_
   2 #define _SCHED_H_
   3
   4 /* sched.h: POSIX 1003.1b Process Scheduling header */
   5
   6 /*-
   7  * Copyright (c) 1996, 1997
   8  *      HD Associates, Inc.  All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by HD Associates, Inc
  21  *      and Jukka Antero Ukkonen.
  22  * 4. Neither the name of the author nor the names of any co-contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  * $FreeBSD: src/sys/posix4/sched.h,v 1.4 1999/12/29 04:55:02 peter Exp $
  39  * $DragonFly: src/sys/sys/sched.h,v 1.3 2003/08/27 06:30:04 rob Exp $
  40  */
  41
  42 #include <sys/types.h>  /* For pid_t */
  43
  44 #ifndef _KERNEL
  45 #include <time.h>               /* Per P1003.4 */
  46 #endif
  47
  48 /* Scheduling policies
  49  */
  50 #define SCHED_FIFO  1
  51 #define SCHED_OTHER 2
  52 #define SCHED_RR    3
  53
  54 struct sched_param
  55 {
  56         int sched_priority;
  57 };
  58
  59 #ifndef _KERNEL
  60 #include <sys/cdefs.h>
  61
  62 __BEGIN_DECLS
  63 int sched_setparam (pid_t, const struct sched_param *);
  64 int sched_getparam (pid_t, struct sched_param *);
  65
  66 int sched_setscheduler (pid_t, int, const struct sched_param *);
  67 int sched_getscheduler (pid_t);
  68
  69 int sched_yield (void);
  70 int sched_get_priority_max (int);
  71 int sched_get_priority_min (int);
  72 int sched_rr_get_interval (pid_t, struct timespec *);
  73 __END_DECLS
  74
  75 #endif
  76
  77 #endif /* _SCHED_H_ */