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  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (c) 1994, Henrik Vestergaard Draboel
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Henrik Vestergaard Draboel.
   18  * 4. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  * $FreeBSD: releng/12.0/sys/sys/rtprio.h 326256 2017-11-27 15:01:59Z pfg $
   34  */
   35 
   36 #ifndef _SYS_RTPRIO_H_
   37 #define _SYS_RTPRIO_H_
   38 
   39 #include <sys/priority.h>
   40 
   41 /*
   42  * Process realtime-priority specifications to rtprio.
   43  */
   44 
   45 /* priority types.  Start at 1 to catch uninitialized fields. */
   46 
   47 #define RTP_PRIO_REALTIME       PRI_REALTIME    /* real time process */
   48 #define RTP_PRIO_NORMAL         PRI_TIMESHARE   /* time sharing process */
   49 #define RTP_PRIO_IDLE           PRI_IDLE        /* idle process */
   50 
   51 /* RTP_PRIO_FIFO is POSIX.1B SCHED_FIFO.
   52  */
   53 
   54 #define RTP_PRIO_FIFO_BIT       PRI_FIFO_BIT
   55 #define RTP_PRIO_FIFO           PRI_FIFO
   56 #define RTP_PRIO_BASE(P)        PRI_BASE(P)
   57 #define RTP_PRIO_IS_REALTIME(P) PRI_IS_REALTIME(P)
   58 #define RTP_PRIO_NEED_RR(P)     PRI_NEED_RR(P)
   59 
   60 /* priority range */
   61 #define RTP_PRIO_MIN            0       /* Highest priority */
   62 #define RTP_PRIO_MAX            31      /* Lowest priority */
   63 
   64 /*
   65  * rtprio() syscall functions
   66  */
   67 #define RTP_LOOKUP              0
   68 #define RTP_SET                 1
   69 
   70 #ifndef LOCORE
   71 /*
   72  * Scheduling class information.
   73  */
   74 struct rtprio {
   75         u_short type;                   /* scheduling class */
   76         u_short prio;
   77 };
   78 
   79 #ifdef _KERNEL
   80 struct thread;
   81 int     rtp_to_pri(struct rtprio *, struct thread *);
   82 void    pri_to_rtp(struct thread *, struct rtprio *);
   83 #endif
   84 #endif
   85 
   86 #ifndef _KERNEL
   87 #include <sys/cdefs.h>
   88 
   89 __BEGIN_DECLS
   90 int     rtprio(int, pid_t, struct rtprio *);
   91 int     rtprio_thread(int, lwpid_t, struct rtprio *);
   92 __END_DECLS
   93 #endif  /* !_KERNEL */
   94 #endif  /* !_SYS_RTPRIO_H_ */

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