The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/rtprio.h

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    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: stable/3/sys/sys/rtprio.h 50583 1999-08-29 16:33:42Z peter $
   32  */
   33 
   34 #ifndef _SYS_RTPRIO_H_
   35 #define _SYS_RTPRIO_H_
   36 
   37 /*
   38  * Process realtime-priority specifications to rtprio.
   39  */
   40 
   41 /* priority types */
   42 
   43 #define RTP_PRIO_REALTIME       0
   44 #define RTP_PRIO_NORMAL         1
   45 #define RTP_PRIO_IDLE           2
   46 
   47 /* RTP_PRIO_FIFO is POSIX.1B SCHED_FIFO.
   48  */
   49 
   50 #define RTP_PRIO_FIFO_BIT       4
   51 #define RTP_PRIO_FIFO           (RTP_PRIO_REALTIME | RTP_PRIO_FIFO_BIT)
   52 #define RTP_PRIO_BASE(P)        ((P) & ~RTP_PRIO_FIFO_BIT)
   53 #define RTP_PRIO_IS_REALTIME(P) (RTP_PRIO_BASE(P) == RTP_PRIO_REALTIME)
   54 #define RTP_PRIO_NEED_RR(P)     ((P) != RTP_PRIO_FIFO)
   55 
   56 /* priority range */
   57 #define RTP_PRIO_MIN            0       /* Highest priority */
   58 #define RTP_PRIO_MAX            31      /* Lowest priority */
   59 
   60 /*
   61  * rtprio() syscall functions
   62  */
   63 #define RTP_LOOKUP              0
   64 #define RTP_SET                 1
   65 
   66 #ifndef LOCORE
   67 struct rtprio {
   68         u_short type;
   69         u_short prio;
   70 };
   71 #endif
   72 
   73 #ifndef KERNEL
   74 #include <sys/cdefs.h>
   75 
   76 __BEGIN_DECLS
   77 int     rtprio __P((int, pid_t, struct rtprio *));
   78 __END_DECLS
   79 #endif  /* !KERNEL */
   80 #endif  /* !_SYS_RTPRIO_H_ */

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