2 * Copyright (c) 1994, Henrik Vestergaard Draboel
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34 #ifndef _SYS_RTPRIO_H_
35 #define _SYS_RTPRIO_H_
38 * Process realtime-priority specifications to rtprio.
41 /* priority types. Start at 1 to catch uninitialized fields. */
43 #define RTP_PRIO_ITHREAD 1 /* interrupt thread */
44 #define RTP_PRIO_REALTIME 2 /* real time process */
45 #define RTP_PRIO_NORMAL 3 /* time sharing process */
46 #define RTP_PRIO_IDLE 4 /* idle process */
48 /* RTP_PRIO_FIFO is POSIX.1B SCHED_FIFO.
51 #define RTP_PRIO_FIFO_BIT 4
52 #define RTP_PRIO_FIFO (RTP_PRIO_REALTIME | RTP_PRIO_FIFO_BIT)
53 #define RTP_PRIO_BASE(P) ((P) & ~RTP_PRIO_FIFO_BIT)
54 #define RTP_PRIO_IS_REALTIME(P) (RTP_PRIO_BASE(P) == RTP_PRIO_REALTIME)
55 #define RTP_PRIO_NEED_RR(P) ((P) != RTP_PRIO_FIFO)
58 #define RTP_PRIO_MIN 0 /* Highest priority */
59 #define RTP_PRIO_MAX 31 /* Lowest priority */
62 * rtprio() syscall functions
69 * Scheduling class information. This is strictly speaking not only
70 * for real-time processes. We should replace it with two variables:
71 * class and priority. At the moment we use prio here for real-time
72 * and interrupt processes, and for others we use proc.p_pri. FIXME.
75 u_short type; /* scheduling class */
81 * Interrupt thread priorities, after BSD/OS.
83 #define PI_REALTIME 1 /* very high priority (clock) */
84 #define PI_AV 2 /* Audio/video devices */
85 #define PI_TTYHIGH 3 /* High priority tty's (small FIFOs) */
86 #define PI_TAPE 4 /* Tape devices (high for streaming) */
87 #define PI_NET 5 /* Network interfaces */
88 #define PI_DISK 6 /* Disks and SCSI */
89 #define PI_TTYLOW 7 /* Ttys with big buffers */
90 #define PI_DISKLOW 8 /* Disks that do programmed I/O */
91 #define PI_DULL 9 /* We don't know or care */
93 /* Soft interrupt threads */
94 #define PI_SOFT 15 /* All soft interrupts */
97 #include <sys/cdefs.h>
100 int rtprio __P((int, pid_t, struct rtprio *));
102 #endif /* !_KERNEL */
103 #endif /* !_SYS_RTPRIO_H_ */