Annotation of prex-old/sys/include/timer.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 _TIMER_H
31: #define _TIMER_H
32:
33: #include <event.h>
34:
35: struct timer {
36: struct list link; /* linkage on timer chain */
37: int active; /* true if active */
38: u_long expire; /* expire time (ticks) */
39: u_long interval; /* time interval */
40: struct event event; /* event for this timer */
41: void (*func)(void *); /* function to call */
42: void *arg; /* function argument */
43: };
44:
45: /*
46: * Macro to compare two timer counts.
47: * time_after() returns true if a is after b.
48: */
49: #define time_after(a,b) (((long)(b) - (long)(a)) < 0)
50: #define time_before(a,b) time_after(b,a)
51:
52: #define time_after_eq(a,b) (((long)(a) - (long)(b)) >= 0)
53: #define time_before_eq(a,b) time_after_eq(b,a)
54:
55: /*
56: * Macro to convert milliseconds and tick.
57: */
58: #define msec_to_tick(ms) (((ms) >= 0x20000) ? \
59: ((ms) / 1000UL) * HZ : ((ms) * HZ) / 1000UL)
60:
61: #define tick_to_msec(tick) (((tick) * 1000) / HZ)
62:
63:
64: extern void timer_callout(struct timer *, void (*)(void *), void *,
65: u_long);
66: extern void timer_stop(struct timer *);
67: extern u_long timer_delay(u_long);
68: extern int timer_sleep(u_long, u_long *);
69: extern int timer_alarm(u_long, u_long *);
70: extern int timer_periodic(struct thread *, u_long, u_long);
71: extern int timer_waitperiod(void);
72: extern void timer_cleanup(struct thread *);
73: extern int timer_hook(void (*)(int));
74: extern void timer_tick(void);
75: extern u_long timer_count(void);
76: extern void timer_info(struct info_timer *);
77: extern void timer_dump(void);
78: extern void timer_init(void);
79:
80: #endif /* !_TIMER_H */
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