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1da177e4 LT |
1 | #ifndef _LINUX_TIMER_H |
2 | #define _LINUX_TIMER_H | |
3 | ||
4 | #include <linux/config.h> | |
5 | #include <linux/list.h> | |
6 | #include <linux/spinlock.h> | |
7 | #include <linux/stddef.h> | |
8 | ||
55c888d6 | 9 | struct timer_base_s; |
1da177e4 LT |
10 | |
11 | struct timer_list { | |
12 | struct list_head entry; | |
13 | unsigned long expires; | |
14 | ||
1da177e4 LT |
15 | unsigned long magic; |
16 | ||
17 | void (*function)(unsigned long); | |
18 | unsigned long data; | |
19 | ||
55c888d6 | 20 | struct timer_base_s *base; |
1da177e4 LT |
21 | }; |
22 | ||
23 | #define TIMER_MAGIC 0x4b87ad6e | |
24 | ||
55c888d6 ON |
25 | extern struct timer_base_s __init_timer_base; |
26 | ||
1da177e4 LT |
27 | #define TIMER_INITIALIZER(_function, _expires, _data) { \ |
28 | .function = (_function), \ | |
29 | .expires = (_expires), \ | |
30 | .data = (_data), \ | |
55c888d6 | 31 | .base = &__init_timer_base, \ |
1da177e4 | 32 | .magic = TIMER_MAGIC, \ |
1da177e4 LT |
33 | } |
34 | ||
55c888d6 | 35 | void fastcall init_timer(struct timer_list * timer); |
1da177e4 LT |
36 | |
37 | /*** | |
38 | * timer_pending - is a timer pending? | |
39 | * @timer: the timer in question | |
40 | * | |
41 | * timer_pending will tell whether a given timer is currently pending, | |
42 | * or not. Callers must ensure serialization wrt. other operations done | |
43 | * to this timer, eg. interrupt contexts, or other CPUs on SMP. | |
44 | * | |
45 | * return value: 1 if the timer is pending, 0 if not. | |
46 | */ | |
47 | static inline int timer_pending(const struct timer_list * timer) | |
48 | { | |
55c888d6 | 49 | return timer->entry.next != NULL; |
1da177e4 LT |
50 | } |
51 | ||
52 | extern void add_timer_on(struct timer_list *timer, int cpu); | |
53 | extern int del_timer(struct timer_list * timer); | |
54 | extern int __mod_timer(struct timer_list *timer, unsigned long expires); | |
55 | extern int mod_timer(struct timer_list *timer, unsigned long expires); | |
56 | ||
57 | extern unsigned long next_timer_interrupt(void); | |
58 | ||
59 | /*** | |
60 | * add_timer - start a timer | |
61 | * @timer: the timer to be added | |
62 | * | |
63 | * The kernel will do a ->function(->data) callback from the | |
64 | * timer interrupt at the ->expired point in the future. The | |
65 | * current time is 'jiffies'. | |
66 | * | |
67 | * The timer's ->expired, ->function (and if the handler uses it, ->data) | |
68 | * fields must be set prior calling this function. | |
69 | * | |
70 | * Timers with an ->expired field in the past will be executed in the next | |
71 | * timer tick. | |
72 | */ | |
73 | static inline void add_timer(struct timer_list * timer) | |
74 | { | |
75 | __mod_timer(timer, timer->expires); | |
76 | } | |
77 | ||
78 | #ifdef CONFIG_SMP | |
fd450b73 | 79 | extern int try_to_del_timer_sync(struct timer_list *timer); |
1da177e4 | 80 | extern int del_timer_sync(struct timer_list *timer); |
1da177e4 | 81 | #else |
fd450b73 ON |
82 | # define try_to_del_timer_sync(t) del_timer(t) |
83 | # define del_timer_sync(t) del_timer(t) | |
1da177e4 LT |
84 | #endif |
85 | ||
55c888d6 ON |
86 | #define del_singleshot_timer_sync(t) del_timer_sync(t) |
87 | ||
1da177e4 LT |
88 | extern void init_timers(void); |
89 | extern void run_local_timers(void); | |
90 | extern void it_real_fn(unsigned long); | |
91 | ||
92 | #endif |