FreeBSD/Linux Kernel Cross Reference
sys/sys/sched.h
1 /*-
2 * Copyright (c) 2002, Jeffrey Roberson <jeff@freebsd.org>
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 unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/5.0/sys/sys/sched.h 107137 2002-11-21 09:30:55Z jeff $
27 */
28
29 #ifndef _SYS_SCHED_H_
30 #define _SYS_SCHED_H_
31
32 /*
33 * General scheduling info.
34 */
35 int sched_rr_interval(void);
36 int sched_runnable(void);
37
38 /*
39 * KSE Groups contain scheduling priority information. They record the
40 * behavior of groups of KSEs and threads.
41 */
42 void sched_exit(struct ksegrp *kg, struct ksegrp *child);
43 void sched_fork(struct ksegrp *kg, struct ksegrp *child);
44 void sched_nice(struct ksegrp *kg, int nice);
45 void sched_prio(struct thread *td, u_char prio);
46 void sched_userret(struct thread *td);
47
48 /*
49 * Threads are switched in and out, block on resources, and have temporary
50 * priorities inherited from their ksegs.
51 */
52 void sched_clock(struct thread *td);
53 void sched_sleep(struct thread *td, u_char prio);
54 void sched_switchin(struct thread *td);
55 void sched_switchout(struct thread *td);
56 void sched_wakeup(struct thread *td);
57
58 /*
59 * KSEs are moved on and off of run queues.
60 */
61 void sched_add(struct kse *ke);
62 void sched_rem(struct kse *ke);
63 struct kse *sched_choose(void);
64
65 /*
66 * and they use up cpu time.
67 */
68 fixpt_t sched_pctcpu(struct kse *ke);
69
70 /*
71 * These procedures tell the process data structure allocation code how
72 * many bytes to actually allocate.
73 */
74 int sched_sizeof_kse(void);
75 int sched_sizeof_ksegrp(void);
76 int sched_sizeof_proc(void);
77 int sched_sizeof_thread(void);
78
79 extern struct ke_sched *kse0_sched;
80 extern struct kg_sched *ksegrp0_sched;
81 extern struct p_sched *proc0_sched;
82 extern struct td_sched *thread0_sched;
83
84 #endif /* !_SYS_SCHED_H_ */
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