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1da177e4 LT |
1 | #ifndef _LINUX_TIMER_H |
2 | #define _LINUX_TIMER_H | |
3 | ||
1da177e4 | 4 | #include <linux/list.h> |
82f67cd9 | 5 | #include <linux/ktime.h> |
1da177e4 LT |
6 | #include <linux/spinlock.h> |
7 | #include <linux/stddef.h> | |
8 | ||
3691c519 | 9 | struct tvec_t_base_s; |
1da177e4 LT |
10 | |
11 | struct timer_list { | |
12 | struct list_head entry; | |
13 | unsigned long expires; | |
14 | ||
1da177e4 LT |
15 | void (*function)(unsigned long); |
16 | unsigned long data; | |
17 | ||
3691c519 | 18 | struct tvec_t_base_s *base; |
82f67cd9 IM |
19 | #ifdef CONFIG_TIMER_STATS |
20 | void *start_site; | |
21 | char start_comm[16]; | |
22 | int start_pid; | |
23 | #endif | |
1da177e4 LT |
24 | }; |
25 | ||
3691c519 | 26 | extern struct tvec_t_base_s boot_tvec_bases; |
55c888d6 | 27 | |
1da177e4 LT |
28 | #define TIMER_INITIALIZER(_function, _expires, _data) { \ |
29 | .function = (_function), \ | |
30 | .expires = (_expires), \ | |
31 | .data = (_data), \ | |
3691c519 | 32 | .base = &boot_tvec_bases, \ |
1da177e4 LT |
33 | } |
34 | ||
8d06afab IM |
35 | #define DEFINE_TIMER(_name, _function, _expires, _data) \ |
36 | struct timer_list _name = \ | |
37 | TIMER_INITIALIZER(_function, _expires, _data) | |
38 | ||
55c888d6 | 39 | void fastcall init_timer(struct timer_list * timer); |
1da177e4 | 40 | |
a8db2db1 ON |
41 | static inline void setup_timer(struct timer_list * timer, |
42 | void (*function)(unsigned long), | |
43 | unsigned long data) | |
44 | { | |
45 | timer->function = function; | |
46 | timer->data = data; | |
47 | init_timer(timer); | |
48 | } | |
49 | ||
45f8bde0 | 50 | /** |
1da177e4 LT |
51 | * timer_pending - is a timer pending? |
52 | * @timer: the timer in question | |
53 | * | |
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. | |
57 | * | |
58 | * return value: 1 if the timer is pending, 0 if not. | |
59 | */ | |
60 | static inline int timer_pending(const struct timer_list * timer) | |
61 | { | |
55c888d6 | 62 | return timer->entry.next != NULL; |
1da177e4 LT |
63 | } |
64 | ||
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); | |
69 | ||
fd064b9b TG |
70 | /* |
71 | * Return when the next timer-wheel timeout occurs (in absolute jiffies), | |
72 | * locks the timer base: | |
73 | */ | |
1da177e4 | 74 | extern unsigned long next_timer_interrupt(void); |
fd064b9b TG |
75 | /* |
76 | * Return when the next timer-wheel timeout occurs (in absolute jiffies), | |
77 | * locks the timer base and does the comparison against the given | |
78 | * jiffie. | |
79 | */ | |
80 | extern unsigned long get_next_timer_interrupt(unsigned long now); | |
1da177e4 | 81 | |
82f67cd9 IM |
82 | /* |
83 | * Timer-statistics info: | |
84 | */ | |
85 | #ifdef CONFIG_TIMER_STATS | |
86 | ||
87 | extern void init_timer_stats(void); | |
88 | ||
89 | extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf, | |
90 | void *timerf, char * comm); | |
91 | ||
92 | static inline void timer_stats_account_timer(struct timer_list *timer) | |
93 | { | |
94 | timer_stats_update_stats(timer, timer->start_pid, timer->start_site, | |
95 | timer->function, timer->start_comm); | |
96 | } | |
97 | ||
98 | extern void __timer_stats_timer_set_start_info(struct timer_list *timer, | |
99 | void *addr); | |
100 | ||
101 | static inline void timer_stats_timer_set_start_info(struct timer_list *timer) | |
102 | { | |
103 | __timer_stats_timer_set_start_info(timer, __builtin_return_address(0)); | |
104 | } | |
105 | ||
106 | static inline void timer_stats_timer_clear_start_info(struct timer_list *timer) | |
107 | { | |
108 | timer->start_site = NULL; | |
109 | } | |
110 | #else | |
111 | static inline void init_timer_stats(void) | |
112 | { | |
113 | } | |
114 | ||
115 | static inline void timer_stats_account_timer(struct timer_list *timer) | |
116 | { | |
117 | } | |
118 | ||
119 | static inline void timer_stats_timer_set_start_info(struct timer_list *timer) | |
120 | { | |
121 | } | |
122 | ||
123 | static inline void timer_stats_timer_clear_start_info(struct timer_list *timer) | |
124 | { | |
125 | } | |
126 | #endif | |
127 | ||
128 | extern void delayed_work_timer_fn(unsigned long __data); | |
129 | ||
45f8bde0 | 130 | /** |
1da177e4 LT |
131 | * add_timer - start a timer |
132 | * @timer: the timer to be added | |
133 | * | |
134 | * The kernel will do a ->function(->data) callback from the | |
13fce806 | 135 | * timer interrupt at the ->expires point in the future. The |
1da177e4 LT |
136 | * current time is 'jiffies'. |
137 | * | |
13fce806 | 138 | * The timer's ->expires, ->function (and if the handler uses it, ->data) |
1da177e4 LT |
139 | * fields must be set prior calling this function. |
140 | * | |
13fce806 | 141 | * Timers with an ->expires field in the past will be executed in the next |
1da177e4 LT |
142 | * timer tick. |
143 | */ | |
15d2bace | 144 | static inline void add_timer(struct timer_list *timer) |
1da177e4 | 145 | { |
15d2bace | 146 | BUG_ON(timer_pending(timer)); |
1da177e4 LT |
147 | __mod_timer(timer, timer->expires); |
148 | } | |
149 | ||
150 | #ifdef CONFIG_SMP | |
fd450b73 | 151 | extern int try_to_del_timer_sync(struct timer_list *timer); |
1da177e4 | 152 | extern int del_timer_sync(struct timer_list *timer); |
1da177e4 | 153 | #else |
fd450b73 ON |
154 | # define try_to_del_timer_sync(t) del_timer(t) |
155 | # define del_timer_sync(t) del_timer(t) | |
1da177e4 LT |
156 | #endif |
157 | ||
55c888d6 ON |
158 | #define del_singleshot_timer_sync(t) del_timer_sync(t) |
159 | ||
1da177e4 LT |
160 | extern void init_timers(void); |
161 | extern void run_local_timers(void); | |
05cfb614 | 162 | struct hrtimer; |
c9cb2e3d | 163 | extern enum hrtimer_restart it_real_fn(struct hrtimer *); |
1da177e4 | 164 | |
4c36a5de AV |
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); | |
169 | ||
170 | ||
1da177e4 | 171 | #endif |