1 /*
2 * Copyright (c) 2017-2019 François Tigeot <ftigeot@wolfpond.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 #ifndef _LINUX_HRTIMER_H_
27 #define _LINUX_HRTIMER_H_
28
29 #include <linux/rbtree.h>
30 #include <linux/ktime.h>
31 #include <linux/init.h>
32 #include <linux/list.h>
33 #include <linux/wait.h>
34 #include <linux/timer.h>
35
36 enum hrtimer_mode {
37 HRTIMER_MODE_ABS = 0x0,
38 HRTIMER_MODE_REL = 0x1,
39 };
40
41 enum hrtimer_restart {
42 HRTIMER_NORESTART, /* Timer is not restarted */
43 HRTIMER_RESTART, /* Timer must be restarted */
44 };
45
46 struct hrtimer {
47 struct callout timer_callout;
48 clockid_t clock_id;
49 enum hrtimer_mode ht_mode;
50 bool active;
51 enum hrtimer_restart (*function)(struct hrtimer *);
52 struct lwkt_token timer_token;
53 };
54
55 extern void hrtimer_init(struct hrtimer *timer, clockid_t which_clock,
56 enum hrtimer_mode mode);
57
58 extern void hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
59 u64 range_ns, const enum hrtimer_mode mode);
60
61 extern int hrtimer_cancel(struct hrtimer *timer);
62
63 extern bool hrtimer_active(const struct hrtimer *timer);
64
65 static inline void
hrtimer_start(struct hrtimer * timer,ktime_t tim,const enum hrtimer_mode mode)66 hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode)
67 {
68 hrtimer_start_range_ns(timer, tim, 0, mode);
69 }
70
71 static inline void
hrtimer_set_expires(struct hrtimer * timer,ktime_t time)72 hrtimer_set_expires(struct hrtimer *timer, ktime_t time)
73 {
74 /* XXX: hrtimer_set_expires() not implemented */
75 }
76
77 #endif /* _LINUX_HRTIMER_H_ */
78