1#ifndef _LINUX_TIMER_H
2#define _LINUX_TIMER_H
3
4#include <linux/list.h>
5#include <linux/spinlock.h>
6#include <linux/stddef.h>
7
8struct tvec_t_base_s;
9
10struct timer_list {
11	struct list_head entry;
12	unsigned long expires;
13
14	void (*function)(unsigned long);
15	unsigned long data;
16
17	struct tvec_t_base_s *base;
18};
19
20extern struct tvec_t_base_s boot_tvec_bases;
21
22#define TIMER_INITIALIZER(_function, _expires, _data) {		\
23		.function = (_function),			\
24		.expires = (_expires),				\
25		.data = (_data),				\
26		.base = &boot_tvec_bases,			\
27	}
28
29#define DEFINE_TIMER(_name, _function, _expires, _data)		\
30	struct timer_list _name =				\
31		TIMER_INITIALIZER(_function, _expires, _data)
32
33void fastcall init_timer(struct timer_list * timer);
34
35static inline void setup_timer(struct timer_list * timer,
36				void (*function)(unsigned long),
37				unsigned long data)
38{
39	timer->function = function;
40	timer->data = data;
41	init_timer(timer);
42}
43
44/***
45 * timer_pending - is a timer pending?
46 * @timer: the timer in question
47 *
48 * timer_pending will tell whether a given timer is currently pending,
49 * or not. Callers must ensure serialization wrt. other operations done
50 * to this timer, eg. interrupt contexts, or other CPUs on SMP.
51 *
52 * return value: 1 if the timer is pending, 0 if not.
53 */
54static inline int timer_pending(const struct timer_list * timer)
55{
56	return timer->entry.next != NULL;
57}
58
59extern void add_timer_on(struct timer_list *timer, int cpu);
60extern int del_timer(struct timer_list * timer);
61extern int __mod_timer(struct timer_list *timer, unsigned long expires);
62extern int mod_timer(struct timer_list *timer, unsigned long expires);
63
64extern unsigned long next_timer_interrupt(void);
65
66/***
67 * add_timer - start a timer
68 * @timer: the timer to be added
69 *
70 * The kernel will do a ->function(->data) callback from the
71 * timer interrupt at the ->expires point in the future. The
72 * current time is 'jiffies'.
73 *
74 * The timer's ->expires, ->function (and if the handler uses it, ->data)
75 * fields must be set prior calling this function.
76 *
77 * Timers with an ->expires field in the past will be executed in the next
78 * timer tick.
79 */
80static inline void add_timer(struct timer_list *timer)
81{
82	BUG_ON(timer_pending(timer));
83	__mod_timer(timer, timer->expires);
84}
85
86#ifdef CONFIG_SMP
87  extern int try_to_del_timer_sync(struct timer_list *timer);
88  extern int del_timer_sync(struct timer_list *timer);
89#else
90# define try_to_del_timer_sync(t)	del_timer(t)
91# define del_timer_sync(t)		del_timer(t)
92#endif
93
94#define del_singleshot_timer_sync(t) del_timer_sync(t)
95
96extern void init_timers(void);
97extern void run_local_timers(void);
98struct hrtimer;
99extern int it_real_fn(struct hrtimer *);
100
101#endif
102