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
);
41 static inline void setup_timer(struct timer_list
* timer
,
42 void (*function
)(unsigned long),
45 timer
->function
= function
;
51 * timer_pending - is a timer pending?
52 * @timer: the timer in question
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.
58 * return value: 1 if the timer is pending, 0 if not.
60 static inline int timer_pending(const struct timer_list
* timer
)
62 return timer
->entry
.next
!= NULL
;
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
);
71 * Return when the next timer-wheel timeout occurs (in absolute jiffies),
72 * locks the timer base:
74 extern unsigned long next_timer_interrupt(void);
76 * Return when the next timer-wheel timeout occurs (in absolute jiffies),
77 * locks the timer base and does the comparison against the given
80 extern unsigned long get_next_timer_interrupt(unsigned long now
);
83 * Timer-statistics info:
85 #ifdef CONFIG_TIMER_STATS
87 extern void init_timer_stats(void);
89 extern void timer_stats_update_stats(void *timer
, pid_t pid
, void *startf
,
90 void *timerf
, char * comm
);
92 static inline void timer_stats_account_timer(struct timer_list
*timer
)
94 timer_stats_update_stats(timer
, timer
->start_pid
, timer
->start_site
,
95 timer
->function
, timer
->start_comm
);
98 extern void __timer_stats_timer_set_start_info(struct timer_list
*timer
,
101 static inline void timer_stats_timer_set_start_info(struct timer_list
*timer
)
103 __timer_stats_timer_set_start_info(timer
, __builtin_return_address(0));
106 static inline void timer_stats_timer_clear_start_info(struct timer_list
*timer
)
108 timer
->start_site
= NULL
;
111 static inline void init_timer_stats(void)
115 static inline void timer_stats_account_timer(struct timer_list
*timer
)
119 static inline void timer_stats_timer_set_start_info(struct timer_list
*timer
)
123 static inline void timer_stats_timer_clear_start_info(struct timer_list
*timer
)
128 extern void delayed_work_timer_fn(unsigned long __data
);
131 * add_timer - start a timer
132 * @timer: the timer to be added
134 * The kernel will do a ->function(->data) callback from the
135 * timer interrupt at the ->expires point in the future. The
136 * current time is 'jiffies'.
138 * The timer's ->expires, ->function (and if the handler uses it, ->data)
139 * fields must be set prior calling this function.
141 * Timers with an ->expires field in the past will be executed in the next
144 static inline void add_timer(struct timer_list
*timer
)
146 BUG_ON(timer_pending(timer
));
147 __mod_timer(timer
, timer
->expires
);
151 extern int try_to_del_timer_sync(struct timer_list
*timer
);
152 extern int del_timer_sync(struct timer_list
*timer
);
154 # define try_to_del_timer_sync(t) del_timer(t)
155 # define del_timer_sync(t) del_timer(t)
158 #define del_singleshot_timer_sync(t) del_timer_sync(t)
160 extern void init_timers(void);
161 extern void run_local_timers(void);
163 extern enum hrtimer_restart
it_real_fn(struct hrtimer
*);
165 unsigned long __round_jiffies(unsigned long j
, int cpu
);
166 unsigned long __round_jiffies_relative(unsigned long j
, int cpu
);
167 unsigned long round_jiffies(unsigned long j
);
168 unsigned long round_jiffies_relative(unsigned long j
);