i386: cpu/transmeta.c: fix definition of USER686
[linux-2.6/x86.git] / include / linux / timer.h
blobe0c5c16c992f2aeac2a2db8436354aec639c1f9a
1 #ifndef _LINUX_TIMER_H
2 #define _LINUX_TIMER_H
4 #include <linux/list.h>
5 #include <linux/ktime.h>
6 #include <linux/spinlock.h>
7 #include <linux/stddef.h>
9 struct tvec_t_base_s;
11 struct timer_list {
12 struct list_head entry;
13 unsigned long expires;
15 void (*function)(unsigned long);
16 unsigned long data;
18 struct tvec_t_base_s *base;
19 #ifdef CONFIG_TIMER_STATS
20 void *start_site;
21 char start_comm[16];
22 int start_pid;
23 #endif
26 extern struct tvec_t_base_s boot_tvec_bases;
28 #define TIMER_INITIALIZER(_function, _expires, _data) { \
29 .function = (_function), \
30 .expires = (_expires), \
31 .data = (_data), \
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),
44 unsigned long data)
46 timer->function = function;
47 timer->data = data;
48 init_timer(timer);
51 /**
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 * Return when the next timer-wheel timeout occurs (in absolute jiffies),
73 * locks the timer base:
75 extern unsigned long next_timer_interrupt(void);
77 * Return when the next timer-wheel timeout occurs (in absolute jiffies),
78 * locks the timer base and does the comparison against the given
79 * jiffie.
81 extern unsigned long get_next_timer_interrupt(unsigned long now);
84 * Timer-statistics info:
86 #ifdef CONFIG_TIMER_STATS
88 extern void init_timer_stats(void);
90 extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
91 void *timerf, char * comm);
93 static inline void timer_stats_account_timer(struct timer_list *timer)
95 timer_stats_update_stats(timer, timer->start_pid, timer->start_site,
96 timer->function, timer->start_comm);
99 extern void __timer_stats_timer_set_start_info(struct timer_list *timer,
100 void *addr);
102 static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
104 __timer_stats_timer_set_start_info(timer, __builtin_return_address(0));
107 static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
109 timer->start_site = NULL;
111 #else
112 static inline void init_timer_stats(void)
116 static inline void timer_stats_account_timer(struct timer_list *timer)
120 static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
124 static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
127 #endif
129 extern void delayed_work_timer_fn(unsigned long __data);
132 * add_timer - start a timer
133 * @timer: the timer to be added
135 * The kernel will do a ->function(->data) callback from the
136 * timer interrupt at the ->expires point in the future. The
137 * current time is 'jiffies'.
139 * The timer's ->expires, ->function (and if the handler uses it, ->data)
140 * fields must be set prior calling this function.
142 * Timers with an ->expires field in the past will be executed in the next
143 * timer tick.
145 static inline void add_timer(struct timer_list *timer)
147 BUG_ON(timer_pending(timer));
148 __mod_timer(timer, timer->expires);
151 #ifdef CONFIG_SMP
152 extern int try_to_del_timer_sync(struct timer_list *timer);
153 extern int del_timer_sync(struct timer_list *timer);
154 #else
155 # define try_to_del_timer_sync(t) del_timer(t)
156 # define del_timer_sync(t) del_timer(t)
157 #endif
159 #define del_singleshot_timer_sync(t) del_timer_sync(t)
161 extern void init_timers(void);
162 extern void run_local_timers(void);
163 struct hrtimer;
164 extern enum hrtimer_restart it_real_fn(struct hrtimer *);
166 unsigned long __round_jiffies(unsigned long j, int cpu);
167 unsigned long __round_jiffies_relative(unsigned long j, int cpu);
168 unsigned long round_jiffies(unsigned long j);
169 unsigned long round_jiffies_relative(unsigned long j);
172 #endif