scoutos / prex-0.9.0 / sys / include / sched.h @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 2005-2007, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | #ifndef _SCHED_H
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31 | #define _SCHED_H
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32 | |||
33 | #include <types.h> |
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34 | #include <sys/cdefs.h> |
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35 | #include <sys/queue.h> |
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36 | #include <event.h> |
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37 | |||
38 | /*
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39 | * Scheduling policies defined by IEEE Std 1003.1-2001
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40 | */
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41 | #define SCHED_FIFO 0 /* First in-first out */ |
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42 | #define SCHED_RR 1 /* Round robin */ |
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43 | #define SCHED_OTHER 2 /* Another scheduling policy */ |
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44 | |||
45 | /*
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46 | * Scheduling quantum (Ticks for context switch)
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47 | */
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48 | #define QUANTUM (CONFIG_TIME_SLICE * HZ / 1000) |
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49 | |||
50 | /*
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51 | * DPC (Deferred Procedure Call) object
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52 | */
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53 | struct dpc {
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54 | struct queue link; /* linkage on DPC queue */ |
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55 | int state;
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56 | void (*func)(void *); /* callback routine */ |
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57 | void *arg; /* argument to pass */ |
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58 | }; |
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59 | |||
60 | /* state for DPC */
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61 | #define DPC_FREE 0x4470463f /* magic# 'DpF?' */ |
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62 | #define DPC_PENDING 0x4470503f /* magic# 'DpP?' */ |
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63 | |||
64 | #define sched_sleep(evt) sched_tsleep((evt), 0) |
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65 | |||
66 | __BEGIN_DECLS |
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67 | int sched_tsleep(struct event *, u_long); |
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68 | void sched_wakeup(struct event *); |
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69 | thread_t sched_wakeone(struct event *);
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70 | void sched_unsleep(thread_t, int); |
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71 | void sched_yield(void); |
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72 | void sched_suspend(thread_t);
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73 | void sched_resume(thread_t);
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74 | void sched_tick(void); |
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75 | void sched_start(thread_t, int, int); |
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76 | void sched_stop(thread_t);
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77 | void sched_lock(void); |
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78 | void sched_unlock(void); |
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79 | int sched_getpri(thread_t);
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80 | void sched_setpri(thread_t, int, int); |
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81 | int sched_getpolicy(thread_t);
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82 | int sched_setpolicy(thread_t, int); |
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83 | void sched_dpc(struct dpc *, void (*)(void *), void *); |
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84 | void sched_init(void); |
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85 | __END_DECLS |
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86 | |||
87 | #endif /* !_SCHED_H */ |