scoutos / prex-0.9.0 / sys / include / timer.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 _TIMER_H
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31 | #define _TIMER_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/list.h> |
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36 | #include <sys/sysinfo.h> |
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37 | #include <event.h> |
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38 | |||
39 | /*
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40 | * Time-out element.
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41 | */
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42 | struct timer {
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43 | struct list link; /* linkage on timer chain */ |
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44 | int state; /* timer state */ |
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45 | u_long expire; /* expiration time, in ticks */
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46 | u_long interval; /* time interval */
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47 | void (*func)(void *); /* function to call */ |
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48 | void *arg; /* function argument */ |
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49 | struct event event; /* event for this timer */ |
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50 | }; |
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51 | |||
52 | /* state for timer */
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53 | #define TM_ACTIVE 0x54616321 /* magic# 'Tac!' */ |
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54 | #define TM_STOP 0x54737421 /* magic# 'Tst!' */ |
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55 | |||
56 | /*
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57 | * Macro to compare two timer counts.
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58 | * time_after() returns true if a is after b.
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59 | */
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60 | #define time_after(a,b) (((long)(b) - (long)(a)) < 0) |
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61 | #define time_before(a,b) time_after(b,a)
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62 | |||
63 | #define time_after_eq(a,b) (((long)(a) - (long)(b)) >= 0) |
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64 | #define time_before_eq(a,b) time_after_eq(b,a)
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65 | |||
66 | /*
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67 | * Macro to get the next element on timer list.
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68 | */
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69 | #define timer_next(head) \
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70 | (list_entry(list_first(head), struct timer, link))
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71 | |||
72 | __BEGIN_DECLS |
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73 | void timer_callout(struct timer *, u_long, void (*)(void *), void *); |
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74 | void timer_stop(struct timer *); |
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75 | u_long timer_delay(u_long); |
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76 | int timer_sleep(u_long, u_long *);
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77 | int timer_alarm(u_long, u_long *);
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78 | int timer_periodic(thread_t, u_long, u_long);
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79 | int timer_waitperiod(void); |
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80 | void timer_cancel(thread_t);
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81 | void timer_clock(void); |
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82 | void timer_handler(void); |
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83 | u_long timer_ticks(void);
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84 | void timer_info(struct timerinfo *); |
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85 | void timer_init(void); |
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86 | __END_DECLS |
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87 | |||
88 | #endif /* !_TIMER_H */ |