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
34#ifndef _SYS_RTPRIO_H_
35#define _SYS_RTPRIO_H_
36
37#include <sys/priority.h>
38
39/*
40 * Process realtime-priority specifications to rtprio.
41 */
42
43/* priority types.  Start at 1 to catch uninitialized fields. */
44
45#define RTP_PRIO_ITHD		PRI_ITHD	/* Interrupt thread. */
46#define RTP_PRIO_REALTIME	PRI_REALTIME	/* real time process */
47#define RTP_PRIO_NORMAL		PRI_TIMESHARE	/* time sharing process */
48#define RTP_PRIO_IDLE		PRI_IDLE	/* idle process */
49
50/* RTP_PRIO_FIFO is POSIX.1B SCHED_FIFO.
51 */
52
53#define RTP_PRIO_FIFO_BIT	PRI_FIFO_BIT
54#define RTP_PRIO_FIFO		PRI_FIFO
55#define RTP_PRIO_BASE(P)	PRI_BASE(P)
56#define RTP_PRIO_IS_REALTIME(P) PRI_IS_REALTIME(P)
57#define RTP_PRIO_NEED_RR(P)	PRI_NEED_RR(P)
58
59/* priority range */
60#define RTP_PRIO_MIN		0	/* Highest priority */
61#define RTP_PRIO_MAX		31	/* Lowest priority */
62
63/*
64 * rtprio() syscall functions
65 */
66#define RTP_LOOKUP		0
67#define RTP_SET			1
68
69#ifndef LOCORE
70/*
71 * Scheduling class information.
72 */
73struct rtprio {
74	u_short type;			/* scheduling class */
75	u_short prio;
76};
77
78#ifdef _KERNEL
79struct thread;
80int	rtp_to_pri(struct rtprio *, struct thread *);
81void	pri_to_rtp(struct thread *, struct rtprio *);
82#endif
83#endif
84
85#ifndef _KERNEL
86#include <sys/cdefs.h>
87
88__BEGIN_DECLS
89int	rtprio(int, pid_t, struct rtprio *);
90int	rtprio_thread(int, lwpid_t, struct rtprio *);
91__END_DECLS
92#endif	/* !_KERNEL */
93#endif	/* !_SYS_RTPRIO_H_ */