Annotation of prex/sys/include/sched.h, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 2005-2007, Kohsuke Ohtani
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, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #ifndef _SCHED_H
31: #define _SCHED_H
32:
33: #include <event.h>
34: #include <thread.h>
35:
36: /*
37: * Scheduling policies defined by IEEE Std 1003.1-2001
38: */
39: #define SCHED_FIFO 0 /* First in-first out */
40: #define SCHED_RR 1 /* Round robin */
41: #define SCHED_OTHER 2 /* Another scheduling policy */
42:
43: /*
44: * Scheduling quantum (Ticks for context switch)
45: */
46: #define QUANTUM (CONFIG_TIME_SLICE * HZ / 1000)
47:
48: /*
49: * DPC (Deferred Procedure Call) object
50: */
51: struct dpc {
52: struct queue link; /* Linkage on DPC queue */
53: int state;
54: void (*func)(void *); /* Callback routine */
55: void *arg; /* Argument to pass */
56: };
57:
58: /* state for DPC */
59: #define DPC_FREE 0x4470463f /* 'DpF?' */
60: #define DPC_PENDING 0x4470503f /* 'DpP?' */
61:
62: #define sched_sleep(evt) sched_tsleep((evt), 0)
63:
64: extern int sched_tsleep(struct event *, u_long);
65: extern void sched_wakeup(struct event *);
66: extern thread_t sched_wakeone(struct event *);
67: extern void sched_unsleep(thread_t, int);
68: extern void sched_yield(void);
69: extern void sched_suspend(thread_t);
70: extern void sched_resume(thread_t);
71: extern void sched_tick(void);
72: extern void sched_start(thread_t);
73: extern void sched_stop(thread_t);
74: extern void sched_lock(void);
75: extern void sched_unlock(void);
76: extern int sched_getprio(thread_t);
77: extern void sched_setprio(thread_t, int, int);
78: extern int sched_getpolicy(thread_t);
79: extern int sched_setpolicy(thread_t, int);
80: extern void sched_dpc(struct dpc *, void (*)(void *), void *);
81: extern void sched_init(void);
82:
83: #endif /* !_SCHED_H */
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