4 #include <linux/list.h>
5 #include <linux/ktime.h>
6 #include <linux/spinlock.h>
7 #include <linux/stddef.h>
12 struct list_head entry;
13 unsigned long expires;
15 void (*function)(unsigned long);
18 struct tvec_t_base_s *base;
19 #ifdef CONFIG_TIMER_STATS
26 extern struct tvec_t_base_s boot_tvec_bases;
28 #define TIMER_INITIALIZER(_function, _expires, _data) { \
29 .function = (_function), \
30 .expires = (_expires), \
32 .base = &boot_tvec_bases, \
35 #define DEFINE_TIMER(_name, _function, _expires, _data) \
36 struct timer_list _name = \
37 TIMER_INITIALIZER(_function, _expires, _data)
39 void fastcall init_timer(struct timer_list * timer);
40 void fastcall init_timer_deferrable(struct timer_list *timer);
42 static inline void setup_timer(struct timer_list * timer,
43 void (*function)(unsigned long),
46 timer->function = function;
52 * timer_pending - is a timer pending?
53 * @timer: the timer in question
55 * timer_pending will tell whether a given timer is currently pending,
56 * or not. Callers must ensure serialization wrt. other operations done
57 * to this timer, eg. interrupt contexts, or other CPUs on SMP.
59 * return value: 1 if the timer is pending, 0 if not.
61 static inline int timer_pending(const struct timer_list * timer)
63 return timer->entry.next != NULL;
66 extern void add_timer_on(struct timer_list *timer, int cpu);
67 extern int del_timer(struct timer_list * timer);
68 extern int __mod_timer(struct timer_list *timer, unsigned long expires);
69 extern int mod_timer(struct timer_list *timer, unsigned long expires);
72 * The jiffies value which is added to now, when there is no timer
75 #define NEXT_TIMER_MAX_DELTA ((1UL << 30) - 1)
78 * Return when the next timer-wheel timeout occurs (in absolute jiffies),
79 * locks the timer base:
81 extern unsigned long next_timer_interrupt(void);
83 * Return when the next timer-wheel timeout occurs (in absolute jiffies),
84 * locks the timer base and does the comparison against the given
87 extern unsigned long get_next_timer_interrupt(unsigned long now);
90 * Timer-statistics info:
92 #ifdef CONFIG_TIMER_STATS
94 extern void init_timer_stats(void);
96 extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
97 void *timerf, char * comm);
99 static inline void timer_stats_account_timer(struct timer_list *timer)
101 timer_stats_update_stats(timer, timer->start_pid, timer->start_site,
102 timer->function, timer->start_comm);
105 extern void __timer_stats_timer_set_start_info(struct timer_list *timer,
108 static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
110 __timer_stats_timer_set_start_info(timer, __builtin_return_address(0));
113 static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
115 timer->start_site = NULL;
118 static inline void init_timer_stats(void)
122 static inline void timer_stats_account_timer(struct timer_list *timer)
126 static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
130 static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
135 extern void delayed_work_timer_fn(unsigned long __data);
138 * add_timer - start a timer
139 * @timer: the timer to be added
141 * The kernel will do a ->function(->data) callback from the
142 * timer interrupt at the ->expires point in the future. The
143 * current time is 'jiffies'.
145 * The timer's ->expires, ->function (and if the handler uses it, ->data)
146 * fields must be set prior calling this function.
148 * Timers with an ->expires field in the past will be executed in the next
151 static inline void add_timer(struct timer_list *timer)
153 BUG_ON(timer_pending(timer));
154 __mod_timer(timer, timer->expires);
158 extern int try_to_del_timer_sync(struct timer_list *timer);
159 extern int del_timer_sync(struct timer_list *timer);
161 # define try_to_del_timer_sync(t) del_timer(t)
162 # define del_timer_sync(t) del_timer(t)
165 #define del_singleshot_timer_sync(t) del_timer_sync(t)
167 extern void init_timers(void);
168 extern void run_local_timers(void);
170 extern enum hrtimer_restart it_real_fn(struct hrtimer *);
172 unsigned long __round_jiffies(unsigned long j, int cpu);
173 unsigned long __round_jiffies_relative(unsigned long j, int cpu);
174 unsigned long round_jiffies(unsigned long j);
175 unsigned long round_jiffies_relative(unsigned long j);