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/5.1/sys/sys/sched.h 113355 2003-04-11 03:39:07Z 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 * Proc related scheduling hooks.
40 */
41 void sched_exit(struct proc *p, struct proc *child);
42 void sched_fork(struct proc *p, struct proc *child);
43
44 /*
45 * KSE Groups contain scheduling priority information. They record the
46 * behavior of groups of KSEs and threads.
47 */
48 void sched_class(struct ksegrp *kg, int class);
49 void sched_exit_ksegrp(struct ksegrp *kg, struct ksegrp *child);
50 void sched_fork_ksegrp(struct ksegrp *kg, struct ksegrp *child);
51 void sched_nice(struct ksegrp *kg, int nice);
52
53 /*
54 * Threads are switched in and out, block on resources, and have temporary
55 * priorities inherited from their ksegs.
56 */
57 void sched_exit_thread(struct thread *td, struct thread *child);
58 void sched_fork_thread(struct thread *td, struct thread *child);
59 void sched_prio(struct thread *td, u_char prio);
60 void sched_sleep(struct thread *td, u_char prio);
61 void sched_switchin(struct thread *td);
62 void sched_switchout(struct thread *td);
63 void sched_userret(struct thread *td);
64 void sched_wakeup(struct thread *td);
65
66 /*
67 * KSEs are moved on and off of run queues.
68 */
69 void sched_add(struct kse *ke);
70 struct kse *sched_choose(void);
71 void sched_clock(struct kse *ke);
72 void sched_exit_kse(struct kse *ke, struct kse *child);
73 void sched_fork_kse(struct kse *ke, struct kse *child);
74 void sched_rem(struct kse *ke);
75
76 /*
77 * and they use up cpu time.
78 */
79 fixpt_t sched_pctcpu(struct kse *ke);
80
81 /*
82 * These procedures tell the process data structure allocation code how
83 * many bytes to actually allocate.
84 */
85 int sched_sizeof_kse(void);
86 int sched_sizeof_ksegrp(void);
87 int sched_sizeof_proc(void);
88 int sched_sizeof_thread(void);
89
90 extern struct ke_sched *kse0_sched;
91 extern struct kg_sched *ksegrp0_sched;
92 extern struct p_sched *proc0_sched;
93 extern struct td_sched *thread0_sched;
94
95 #endif /* !_SYS_SCHED_H_ */
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