1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice unmodified, this list of conditions, and the following
12 *    disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28#ifndef _LINUX_TIMER_H_
29#define _LINUX_TIMER_H_
30
31#include <linux/types.h>
32
33#include <sys/param.h>
34#include <sys/kernel.h>
35#include <sys/callout.h>
36
37struct timer_list {
38	struct callout	timer_callout;
39	void		(*function)(unsigned long);
40	unsigned long	data;
41	unsigned long	expires;
42};
43
44static inline void
45_timer_fn(void *context)
46{
47	struct timer_list *timer;
48
49	timer = context;
50	timer->function(timer->data);
51}
52
53#define	setup_timer(timer, func, dat)					\
54do {									\
55	(timer)->function = (func);					\
56	(timer)->data = (dat);						\
57	callout_init(&(timer)->timer_callout, CALLOUT_MPSAFE);		\
58} while (0)
59
60#define	init_timer(timer)						\
61do {									\
62	(timer)->function = NULL;					\
63	(timer)->data = 0;						\
64	callout_init(&(timer)->timer_callout, CALLOUT_MPSAFE);		\
65} while (0)
66
67#define	mod_timer(timer, exp)						\
68do {									\
69	(timer)->expires = (exp);					\
70	callout_reset(&(timer)->timer_callout, (exp) - jiffies,		\
71	    _timer_fn, (timer));					\
72} while (0)
73
74#define	add_timer(timer)						\
75	callout_reset(&(timer)->timer_callout,				\
76	    (timer)->expires - jiffies, _timer_fn, (timer))
77
78#define	del_timer(timer)	callout_stop(&(timer)->timer_callout)
79#define	del_timer_sync(timer)	callout_drain(&(timer)->timer_callout)
80
81#define	timer_pending(timer)	callout_pending(&(timer)->timer_callout)
82
83static inline unsigned long
84round_jiffies(unsigned long j)
85{
86	return roundup(j, hz);
87}
88
89#endif /* _LINUX_TIMER_H_ */
90