Commit | Line | Data |
---|---|---|
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 | ||
8d06afab IM |
35 | #define DEFINE_TIMER(_name, _function, _expires, _data) \ |
36 | struct timer_list _name = \ | |
37 | TIMER_INITIALIZER(_function, _expires, _data) | |
38 | ||
55c888d6 | 39 | void fastcall init_timer(struct timer_list * timer); |
1da177e4 | 40 | |
a8db2db1 ON |
41 | static inline void setup_timer(struct timer_list * timer, |
42 | void (*function)(unsigned long), | |
43 | unsigned long data) | |
44 | { | |
45 | timer->function = function; | |
46 | timer->data = data; | |
47 | init_timer(timer); | |
48 | } | |
49 | ||
1da177e4 LT |
50 | /*** |
51 | * timer_pending - is a timer pending? | |
52 | * @timer: the timer in question | |
53 | * | |
54 | * timer_pending will tell whether a given timer is currently pending, | |
55 | * or not. Callers must ensure serialization wrt. other operations done | |
56 | * to this timer, eg. interrupt contexts, or other CPUs on SMP. | |
57 | * | |
58 | * return value: 1 if the timer is pending, 0 if not. | |
59 | */ | |
60 | static inline int timer_pending(const struct timer_list * timer) | |
61 | { | |
55c888d6 | 62 | return timer->entry.next != NULL; |
1da177e4 LT |
63 | } |
64 | ||
65 | extern void add_timer_on(struct timer_list *timer, int cpu); | |
66 | extern int del_timer(struct timer_list * timer); | |
67 | extern int __mod_timer(struct timer_list *timer, unsigned long expires); | |
68 | extern int mod_timer(struct timer_list *timer, unsigned long expires); | |
69 | ||
70 | extern unsigned long next_timer_interrupt(void); | |
71 | ||
72 | /*** | |
73 | * add_timer - start a timer | |
74 | * @timer: the timer to be added | |
75 | * | |
76 | * The kernel will do a ->function(->data) callback from the | |
77 | * timer interrupt at the ->expired point in the future. The | |
78 | * current time is 'jiffies'. | |
79 | * | |
80 | * The timer's ->expired, ->function (and if the handler uses it, ->data) | |
81 | * fields must be set prior calling this function. | |
82 | * | |
83 | * Timers with an ->expired field in the past will be executed in the next | |
84 | * timer tick. | |
85 | */ | |
86 | static inline void add_timer(struct timer_list * timer) | |
87 | { | |
88 | __mod_timer(timer, timer->expires); | |
89 | } | |
90 | ||
91 | #ifdef CONFIG_SMP | |
fd450b73 | 92 | extern int try_to_del_timer_sync(struct timer_list *timer); |
1da177e4 | 93 | extern int del_timer_sync(struct timer_list *timer); |
1da177e4 | 94 | #else |
fd450b73 ON |
95 | # define try_to_del_timer_sync(t) del_timer(t) |
96 | # define del_timer_sync(t) del_timer(t) | |
1da177e4 LT |
97 | #endif |
98 | ||
55c888d6 ON |
99 | #define del_singleshot_timer_sync(t) del_timer_sync(t) |
100 | ||
1da177e4 LT |
101 | extern void init_timers(void); |
102 | extern void run_local_timers(void); | |
103 | extern void it_real_fn(unsigned long); | |
104 | ||
105 | #endif |