| 1 | #ifndef _LINUX_TIMER_H
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| 2 | #define _LINUX_TIMER_H
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| 3 |
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| 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 | #include <linux/stddef.h>
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| 8 |
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| 9 | struct timer_base_s;
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| 10 |
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| 11 | struct timer_list {
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| 12 | struct list_head entry;
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| 13 | unsigned long expires;
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| 14 |
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| 15 | unsigned long magic;
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| 16 |
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| 17 | void (*function)(unsigned long);
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| 18 | unsigned long data;
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| 19 |
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| 20 | struct timer_base_s *base;
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| 21 | };
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| 22 |
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| 23 | #define TIMER_MAGIC 0x4b87ad6e
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| 24 |
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| 25 | extern struct timer_base_s __init_timer_base;
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| 26 |
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| 27 | #define TIMER_INITIALIZER(_function, _expires, _data) { \
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| 28 | .function = (_function), \
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| 29 | .expires = (_expires), \
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| 30 | .data = (_data), \
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| 31 | .base = &__init_timer_base, \
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| 32 | .magic = TIMER_MAGIC, \
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| 33 | }
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| 34 |
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| 35 | #define DEFINE_TIMER(_name, _function, _expires, _data) \
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| 36 | struct timer_list _name = \
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| 37 | TIMER_INITIALIZER(_function, _expires, _data)
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| 38 |
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| 39 | void fastcall init_timer(struct timer_list * timer);
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| 40 |
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| 41 | |
| 42 | * timer_pending - is a timer pending?
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| 43 | * @timer: the timer in question
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| 44 | *
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| 45 | * timer_pending will tell whether a given timer is currently pending,
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| 46 | * or not. Callers must ensure serialization wrt. other operations done
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| 47 | * to this timer, eg. interrupt contexts, or other CPUs on SMP.
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| 48 | *
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| 49 | * return value: 1 if the timer is pending, 0 if not.
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| 50 |
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| 51 | static inline int timer_pending(const struct timer_list * timer)
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| 52 | {
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| 53 | return timer->entry.next != NULL;
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| 54 | }
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| 55 |
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| 56 | extern void add_timer_on(struct timer_list *timer, int cpu);
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| 57 | extern int del_timer(struct timer_list * timer);
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| 58 | extern int __mod_timer(struct timer_list *timer, unsigned long expires);
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| 59 | extern int mod_timer(struct timer_list *timer, unsigned long expires);
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| 60 |
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| 61 | extern unsigned long next_timer_interrupt(void);
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| 62 |
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| 63 | |
| 64 | * add_timer - start a timer
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| 65 | * @timer: the timer to be added
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| 66 | *
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| 67 | * The kernel will do a ->function(->data) callback from the
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| 68 | * timer interrupt at the ->expired point in the future. The
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| 69 | * current time is 'jiffies'.
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| 70 | *
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| 71 | * The timer's ->expired, ->function (and if the handler uses it, ->data)
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| 72 | * fields must be set prior calling this function.
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| 73 | *
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| 74 | * Timers with an ->expired field in the past will be executed in the next
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| 75 | * timer tick.
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| 76 |
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| 77 | static inline void add_timer(struct timer_list * timer)
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| 78 | {
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| 79 | __mod_timer(timer, timer->expires);
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| 80 | }
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| 81 |
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| 82 | #ifdef CONFIG_SMP
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| 83 | extern int try_to_del_timer_sync(struct timer_list *timer);
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| 84 | extern int del_timer_sync(struct timer_list *timer);
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| 85 | #else
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| 86 | # define try_to_del_timer_sync(t) del_timer(t)
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| 87 | # define del_timer_sync(t) del_timer(t)
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| 88 | #endif
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| 89 |
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| 90 | #define del_singleshot_timer_sync(t) del_timer_sync(t)
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| 91 |
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| 92 | extern void init_timers(void);
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| 93 | extern void run_local_timers(void);
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| 94 | extern void it_real_fn(unsigned long);
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| 95 |
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| 96 | #endif
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