sys/sys/rtprio.h

   1 /*
   2  * Copyright (c) 1994, Henrik Vestergaard Draboel
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by (name).
  16  * 4. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $FreeBSD: src/sys/sys/rtprio.h,v 1.9 1999/12/29 04:24:46 peter Exp $
  32  * $DragonFly: src/sys/sys/rtprio.h,v 1.4 2003/08/20 07:31:21 rob Exp $
  33  */
  34
  35 #ifndef _SYS_RTPRIO_H_
  36 #define _SYS_RTPRIO_H_
  37
  38 /*
  39  * Process realtime-priority specifications to rtprio.
  40  */
  41
  42 /* priority types */
  43
  44 #define RTP_PRIO_REALTIME       0
  45 #define RTP_PRIO_NORMAL         1
  46 #define RTP_PRIO_IDLE           2
  47 #define RTP_PRIO_THREAD         3
  48
  49 /* RTP_PRIO_FIFO is POSIX.1B SCHED_FIFO.
  50  */
  51
  52 #define RTP_PRIO_FIFO_BIT       4
  53 #define RTP_PRIO_FIFO           (RTP_PRIO_REALTIME | RTP_PRIO_FIFO_BIT)
  54 #define RTP_PRIO_BASE(P)        ((P) & ~RTP_PRIO_FIFO_BIT)
  55 #define RTP_PRIO_IS_REALTIME(P) (RTP_PRIO_BASE(P) == RTP_PRIO_REALTIME)
  56 #define RTP_PRIO_NEED_RR(P)     ((P) != RTP_PRIO_FIFO)
  57
  58 /* priority range */
  59 #define RTP_PRIO_MIN            0       /* Highest priority */
  60 #define RTP_PRIO_MAX            31      /* Lowest priority */
  61
  62 /*
  63  * rtprio() syscall functions
  64  */
  65 #define RTP_LOOKUP              0
  66 #define RTP_SET                 1
  67
  68 #ifndef LOCORE
  69 struct rtprio {
  70         u_short type;
  71         u_short prio;
  72 };
  73 #endif
  74
  75 #ifndef _KERNEL
  76 #include <sys/cdefs.h>
  77
  78 __BEGIN_DECLS
  79 int     rtprio (int, pid_t, struct rtprio *);
  80 __END_DECLS
  81 #endif  /* !_KERNEL */
  82 #endif  /* !_SYS_RTPRIO_H_ */