timer.h revision 271127 
1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29#ifndef _LINUX_TIMER_H_
30#define _LINUX_TIMER_H_
31
32#include <linux/types.h>
33
34#include <sys/param.h>
35#include <sys/kernel.h>
36#include <sys/callout.h>
37
38struct timer_list {
39	struct callout	timer_callout;
40	void		(*function)(unsigned long);
41	unsigned long	data;
42	unsigned long	expires;
43};
44
45static inline void
46_timer_fn(void *context)
47{
48	struct timer_list *timer;
49
50	timer = context;
51	timer->function(timer->data);
52}
53
54#define	setup_timer(timer, func, dat)					\
55do {									\
56	(timer)->function = (func);					\
57	(timer)->data = (dat);						\
58	callout_init(&(timer)->timer_callout, CALLOUT_MPSAFE);		\
59} while (0)
60
61#define	init_timer(timer)						\
62do {									\
63	(timer)->function = NULL;					\
64	(timer)->data = 0;						\
65	callout_init(&(timer)->timer_callout, CALLOUT_MPSAFE);		\
66} while (0)
67
68#define	mod_timer(timer, exp)						\
69do {									\
70	(timer)->expires = (exp);					\
71	callout_reset(&(timer)->timer_callout, (exp) - jiffies,		\
72	    _timer_fn, (timer));					\
73} while (0)
74
75#define	add_timer(timer)						\
76	callout_reset(&(timer)->timer_callout,				\
77	    (timer)->expires - jiffies, _timer_fn, (timer))
78
79#define	del_timer(timer)	callout_stop(&(timer)->timer_callout)
80#define	del_timer_sync(timer)	callout_drain(&(timer)->timer_callout)
81
82#define	timer_pending(timer)	callout_pending(&(timer)->timer_callout)
83
84static inline unsigned long
85round_jiffies(unsigned long j)
86{
87	return roundup(j, hz);
88}
89
90#define round_jiffies_relative(j) round_jiffies(j)
91
92#endif /* _LINUX_TIMER_H_ */
93