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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _LINUX_TIMER_H |
| 2 | #define _LINUX_TIMER_H |
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| 3 | |||
| 4 | #include <linux/config.h> |
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| 5 | #include <linux/list.h> |
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| 6 | #include <linux/spinlock.h> |
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| 7 | |||
| 8 | struct tvec_t_base_s; |
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| 9 | |||
| 10 | struct timer_list { |
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| 11 | struct list_head entry; |
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| 12 | unsigned long expires; |
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| 13 | |||
| 14 | spinlock_t lock; |
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| 15 | unsigned long magic; |
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| 16 | |||
| 17 | void (*function)(unsigned long); |
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| 18 | unsigned long data; |
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| 19 | |||
| 20 | struct tvec_t_base_s *base; |
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| 21 | }; |
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| 22 | |||
| 23 | #define TIMER_MAGIC 0x4b87ad6e |
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| 24 | |||
| 25 | #define TIMER_INITIALIZER(_function, _expires, _data) { \ |
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| 26 | .function = (_function), \ |
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| 27 | .expires = (_expires), \ |
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| 28 | .data = (_data), \ |
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| 29 | .base = NULL, \ |
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| 30 | .magic = TIMER_MAGIC, \ |
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| 31 | .lock = SPIN_LOCK_UNLOCKED, \ |
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| 32 | } |
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| 33 | |||
| 34 | /*** |
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| 35 | * init_timer - initialize a timer. |
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| 36 | * @timer: the timer to be initialized |
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| 37 | * |
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| 38 | * init_timer() must be done to a timer prior calling *any* of the |
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| 39 | * other timer functions. |
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| 40 | */ |
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| 41 | static inline void init_timer(struct timer_list * timer) |
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| 42 | { |
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| 43 | timer->base = NULL; |
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| 44 | timer->magic = TIMER_MAGIC; |
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| 45 | spin_lock_init(&timer->lock); |
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| 46 | } |
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| 47 | |||
| 48 | /*** |
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| 49 | * timer_pending - is a timer pending? |
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| 50 | * @timer: the timer in question |
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| 51 | * |
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| 52 | * timer_pending will tell whether a given timer is currently pending, |
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| 53 | * or not. Callers must ensure serialization wrt. other operations done |
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| 54 | * to this timer, eg. interrupt contexts, or other CPUs on SMP. |
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| 55 | * |
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| 56 | * return value: 1 if the timer is pending, 0 if not. |
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| 57 | */ |
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| 58 | static inline int timer_pending(const struct timer_list * timer) |
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| 59 | { |
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| 60 | return timer->base != NULL; |
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| 61 | } |
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| 62 | |||
| 63 | extern void add_timer_on(struct timer_list *timer, int cpu); |
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| 64 | extern int del_timer(struct timer_list * timer); |
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| 65 | extern int __mod_timer(struct timer_list *timer, unsigned long expires); |
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| 66 | extern int mod_timer(struct timer_list *timer, unsigned long expires); |
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| 67 | |||
| 68 | /*** |
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| 69 | * add_timer - start a timer |
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| 70 | * @timer: the timer to be added |
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| 71 | * |
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| 72 | * The kernel will do a ->function(->data) callback from the |
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| 73 | * timer interrupt at the ->expired point in the future. The |
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| 74 | * current time is 'jiffies'. |
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| 75 | * |
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| 76 | * The timer's ->expired, ->function (and if the handler uses it, ->data) |
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| 77 | * fields must be set prior calling this function. |
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| 78 | * |
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| 79 | * Timers with an ->expired field in the past will be executed in the next |
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| 80 | * timer tick. |
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| 81 | */ |
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| 82 | static inline void add_timer(struct timer_list * timer) |
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| 83 | { |
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| 84 | __mod_timer(timer, timer->expires); |
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| 85 | } |
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| 86 | |||
| 87 | #ifdef CONFIG_SMP |
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| 88 | extern int del_timer_sync(struct timer_list * timer); |
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| 89 | #else |
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| 90 | # define del_timer_sync(t) del_timer(t) |
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| 91 | #endif |
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| 92 | |||
| 93 | extern void init_timers(void); |
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| 94 | extern void run_local_timers(void); |
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| 95 | extern void it_real_fn(unsigned long); |
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| 96 | |||
| 97 | #endif |