Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_TIMER_H |
| 2 | #define _LINUX_TIMER_H |
| 3 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | #include <linux/list.h> |
| 5 | #include <linux/spinlock.h> |
| 6 | #include <linux/stddef.h> |
| 7 | |
Oleg Nesterov | 3691c51 | 2006-03-31 02:30:30 -0800 | [diff] [blame] | 8 | struct tvec_t_base_s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | |
| 10 | struct timer_list { |
| 11 | struct list_head entry; |
| 12 | unsigned long expires; |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | void (*function)(unsigned long); |
| 15 | unsigned long data; |
| 16 | |
Oleg Nesterov | 3691c51 | 2006-03-31 02:30:30 -0800 | [diff] [blame] | 17 | struct tvec_t_base_s *base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | }; |
| 19 | |
Oleg Nesterov | 3691c51 | 2006-03-31 02:30:30 -0800 | [diff] [blame] | 20 | extern struct tvec_t_base_s boot_tvec_bases; |
Oleg Nesterov | 55c888d | 2005-06-23 00:08:56 -0700 | [diff] [blame] | 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #define TIMER_INITIALIZER(_function, _expires, _data) { \ |
| 23 | .function = (_function), \ |
| 24 | .expires = (_expires), \ |
| 25 | .data = (_data), \ |
Oleg Nesterov | 3691c51 | 2006-03-31 02:30:30 -0800 | [diff] [blame] | 26 | .base = &boot_tvec_bases, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | } |
| 28 | |
Ingo Molnar | 8d06afa | 2005-09-09 13:10:40 -0700 | [diff] [blame] | 29 | #define DEFINE_TIMER(_name, _function, _expires, _data) \ |
| 30 | struct timer_list _name = \ |
| 31 | TIMER_INITIALIZER(_function, _expires, _data) |
| 32 | |
Oleg Nesterov | 55c888d | 2005-06-23 00:08:56 -0700 | [diff] [blame] | 33 | void fastcall init_timer(struct timer_list * timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
Oleg Nesterov | a8db2db | 2005-10-30 15:01:38 -0800 | [diff] [blame] | 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 | |
Robert P. J. Day | 45f8bde | 2007-01-26 00:57:09 -0800 | [diff] [blame] | 44 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Oleg Nesterov | 55c888d | 2005-06-23 00:08:56 -0700 | [diff] [blame] | 56 | return timer->entry.next != NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 64 | extern unsigned long next_timer_interrupt(void); |
| 65 | |
Robert P. J. Day | 45f8bde | 2007-01-26 00:57:09 -0800 | [diff] [blame] | 66 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Andrzej Zaborowski | 13fce80 | 2006-03-24 18:13:37 +0100 | [diff] [blame] | 71 | * timer interrupt at the ->expires point in the future. The |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | * current time is 'jiffies'. |
| 73 | * |
Andrzej Zaborowski | 13fce80 | 2006-03-24 18:13:37 +0100 | [diff] [blame] | 74 | * The timer's ->expires, ->function (and if the handler uses it, ->data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | * fields must be set prior calling this function. |
| 76 | * |
Andrzej Zaborowski | 13fce80 | 2006-03-24 18:13:37 +0100 | [diff] [blame] | 77 | * Timers with an ->expires field in the past will be executed in the next |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | * timer tick. |
| 79 | */ |
Andrew Morton | 15d2bac | 2005-10-30 15:02:24 -0800 | [diff] [blame] | 80 | static inline void add_timer(struct timer_list *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { |
Andrew Morton | 15d2bac | 2005-10-30 15:02:24 -0800 | [diff] [blame] | 82 | BUG_ON(timer_pending(timer)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | __mod_timer(timer, timer->expires); |
| 84 | } |
| 85 | |
| 86 | #ifdef CONFIG_SMP |
Oleg Nesterov | fd450b7 | 2005-06-23 00:08:59 -0700 | [diff] [blame] | 87 | extern int try_to_del_timer_sync(struct timer_list *timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | extern int del_timer_sync(struct timer_list *timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | #else |
Oleg Nesterov | fd450b7 | 2005-06-23 00:08:59 -0700 | [diff] [blame] | 90 | # define try_to_del_timer_sync(t) del_timer(t) |
| 91 | # define del_timer_sync(t) del_timer(t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | #endif |
| 93 | |
Oleg Nesterov | 55c888d | 2005-06-23 00:08:56 -0700 | [diff] [blame] | 94 | #define del_singleshot_timer_sync(t) del_timer_sync(t) |
| 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | extern void init_timers(void); |
| 97 | extern void run_local_timers(void); |
Roman Zippel | 05cfb61 | 2006-03-26 01:38:12 -0800 | [diff] [blame] | 98 | struct hrtimer; |
| 99 | extern int it_real_fn(struct hrtimer *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Arjan van de Ven | 4c36a5d | 2006-12-10 02:21:24 -0800 | [diff] [blame] | 101 | unsigned long __round_jiffies(unsigned long j, int cpu); |
| 102 | unsigned long __round_jiffies_relative(unsigned long j, int cpu); |
| 103 | unsigned long round_jiffies(unsigned long j); |
| 104 | unsigned long round_jiffies_relative(unsigned long j); |
| 105 | |
| 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | #endif |