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