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1da177e4 LT |
1 | #ifndef _LINUX_TIMER_H |
2 | #define _LINUX_TIMER_H | |
3 | ||
1da177e4 LT |
4 | #include <linux/list.h> |
5 | #include <linux/spinlock.h> | |
6 | #include <linux/stddef.h> | |
7 | ||
3691c519 | 8 | struct tvec_t_base_s; |
1da177e4 LT |
9 | |
10 | struct timer_list { | |
11 | struct list_head entry; | |
12 | unsigned long expires; | |
13 | ||
1da177e4 LT |
14 | void (*function)(unsigned long); |
15 | unsigned long data; | |
16 | ||
3691c519 | 17 | struct tvec_t_base_s *base; |
1da177e4 LT |
18 | }; |
19 | ||
3691c519 | 20 | extern struct tvec_t_base_s boot_tvec_bases; |
55c888d6 | 21 | |
1da177e4 LT |
22 | #define TIMER_INITIALIZER(_function, _expires, _data) { \ |
23 | .function = (_function), \ | |
24 | .expires = (_expires), \ | |
25 | .data = (_data), \ | |
3691c519 | 26 | .base = &boot_tvec_bases, \ |
1da177e4 LT |
27 | } |
28 | ||
8d06afab IM |
29 | #define DEFINE_TIMER(_name, _function, _expires, _data) \ |
30 | struct timer_list _name = \ | |
31 | TIMER_INITIALIZER(_function, _expires, _data) | |
32 | ||
55c888d6 | 33 | void fastcall init_timer(struct timer_list * timer); |
1da177e4 | 34 | |
a8db2db1 ON |
35 | static 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 | ||
45f8bde0 | 44 | /** |
1da177e4 LT |
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 | */ | |
54 | static inline int timer_pending(const struct timer_list * timer) | |
55 | { | |
55c888d6 | 56 | return timer->entry.next != NULL; |
1da177e4 LT |
57 | } |
58 | ||
59 | extern void add_timer_on(struct timer_list *timer, int cpu); | |
60 | extern int del_timer(struct timer_list * timer); | |
61 | extern int __mod_timer(struct timer_list *timer, unsigned long expires); | |
62 | extern int mod_timer(struct timer_list *timer, unsigned long expires); | |
63 | ||
fd064b9b TG |
64 | /* |
65 | * Return when the next timer-wheel timeout occurs (in absolute jiffies), | |
66 | * locks the timer base: | |
67 | */ | |
1da177e4 | 68 | extern unsigned long next_timer_interrupt(void); |
fd064b9b TG |
69 | /* |
70 | * Return when the next timer-wheel timeout occurs (in absolute jiffies), | |
71 | * locks the timer base and does the comparison against the given | |
72 | * jiffie. | |
73 | */ | |
74 | extern unsigned long get_next_timer_interrupt(unsigned long now); | |
1da177e4 | 75 | |
45f8bde0 | 76 | /** |
1da177e4 LT |
77 | * add_timer - start a timer |
78 | * @timer: the timer to be added | |
79 | * | |
80 | * The kernel will do a ->function(->data) callback from the | |
13fce806 | 81 | * timer interrupt at the ->expires point in the future. The |
1da177e4 LT |
82 | * current time is 'jiffies'. |
83 | * | |
13fce806 | 84 | * The timer's ->expires, ->function (and if the handler uses it, ->data) |
1da177e4 LT |
85 | * fields must be set prior calling this function. |
86 | * | |
13fce806 | 87 | * Timers with an ->expires field in the past will be executed in the next |
1da177e4 LT |
88 | * timer tick. |
89 | */ | |
15d2bace | 90 | static inline void add_timer(struct timer_list *timer) |
1da177e4 | 91 | { |
15d2bace | 92 | BUG_ON(timer_pending(timer)); |
1da177e4 LT |
93 | __mod_timer(timer, timer->expires); |
94 | } | |
95 | ||
96 | #ifdef CONFIG_SMP | |
fd450b73 | 97 | extern int try_to_del_timer_sync(struct timer_list *timer); |
1da177e4 | 98 | extern int del_timer_sync(struct timer_list *timer); |
1da177e4 | 99 | #else |
fd450b73 ON |
100 | # define try_to_del_timer_sync(t) del_timer(t) |
101 | # define del_timer_sync(t) del_timer(t) | |
1da177e4 LT |
102 | #endif |
103 | ||
55c888d6 ON |
104 | #define del_singleshot_timer_sync(t) del_timer_sync(t) |
105 | ||
1da177e4 LT |
106 | extern void init_timers(void); |
107 | extern void run_local_timers(void); | |
05cfb614 | 108 | struct hrtimer; |
c9cb2e3d | 109 | extern enum hrtimer_restart it_real_fn(struct hrtimer *); |
1da177e4 | 110 | |
4c36a5de AV |
111 | unsigned long __round_jiffies(unsigned long j, int cpu); |
112 | unsigned long __round_jiffies_relative(unsigned long j, int cpu); | |
113 | unsigned long round_jiffies(unsigned long j); | |
114 | unsigned long round_jiffies_relative(unsigned long j); | |
115 | ||
116 | ||
1da177e4 | 117 | #endif |