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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); |
6e453a67 | 40 | void fastcall init_timer_deferrable(struct timer_list *timer); |
1da177e4 | 41 | |
a8db2db1 ON |
42 | static inline void setup_timer(struct timer_list * timer, |
43 | void (*function)(unsigned long), | |
44 | unsigned long data) | |
45 | { | |
46 | timer->function = function; | |
47 | timer->data = data; | |
48 | init_timer(timer); | |
49 | } | |
50 | ||
45f8bde0 | 51 | /** |
1da177e4 LT |
52 | * timer_pending - is a timer pending? |
53 | * @timer: the timer in question | |
54 | * | |
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. | |
58 | * | |
59 | * return value: 1 if the timer is pending, 0 if not. | |
60 | */ | |
61 | static inline int timer_pending(const struct timer_list * timer) | |
62 | { | |
55c888d6 | 63 | return timer->entry.next != NULL; |
1da177e4 LT |
64 | } |
65 | ||
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); | |
70 | ||
fd064b9b TG |
71 | /* |
72 | * Return when the next timer-wheel timeout occurs (in absolute jiffies), | |
73 | * locks the timer base: | |
74 | */ | |
1da177e4 | 75 | extern unsigned long next_timer_interrupt(void); |
fd064b9b TG |
76 | /* |
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. | |
80 | */ | |
81 | extern unsigned long get_next_timer_interrupt(unsigned long now); | |
1da177e4 | 82 | |
82f67cd9 IM |
83 | /* |
84 | * Timer-statistics info: | |
85 | */ | |
86 | #ifdef CONFIG_TIMER_STATS | |
87 | ||
88 | extern void init_timer_stats(void); | |
89 | ||
90 | extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf, | |
91 | void *timerf, char * comm); | |
92 | ||
93 | static inline void timer_stats_account_timer(struct timer_list *timer) | |
94 | { | |
95 | timer_stats_update_stats(timer, timer->start_pid, timer->start_site, | |
96 | timer->function, timer->start_comm); | |
97 | } | |
98 | ||
99 | extern void __timer_stats_timer_set_start_info(struct timer_list *timer, | |
100 | void *addr); | |
101 | ||
102 | static inline void timer_stats_timer_set_start_info(struct timer_list *timer) | |
103 | { | |
104 | __timer_stats_timer_set_start_info(timer, __builtin_return_address(0)); | |
105 | } | |
106 | ||
107 | static inline void timer_stats_timer_clear_start_info(struct timer_list *timer) | |
108 | { | |
109 | timer->start_site = NULL; | |
110 | } | |
111 | #else | |
112 | static inline void init_timer_stats(void) | |
113 | { | |
114 | } | |
115 | ||
116 | static inline void timer_stats_account_timer(struct timer_list *timer) | |
117 | { | |
118 | } | |
119 | ||
120 | static inline void timer_stats_timer_set_start_info(struct timer_list *timer) | |
121 | { | |
122 | } | |
123 | ||
124 | static inline void timer_stats_timer_clear_start_info(struct timer_list *timer) | |
125 | { | |
126 | } | |
127 | #endif | |
128 | ||
129 | extern void delayed_work_timer_fn(unsigned long __data); | |
130 | ||
45f8bde0 | 131 | /** |
1da177e4 LT |
132 | * add_timer - start a timer |
133 | * @timer: the timer to be added | |
134 | * | |
135 | * The kernel will do a ->function(->data) callback from the | |
13fce806 | 136 | * timer interrupt at the ->expires point in the future. The |
1da177e4 LT |
137 | * current time is 'jiffies'. |
138 | * | |
13fce806 | 139 | * The timer's ->expires, ->function (and if the handler uses it, ->data) |
1da177e4 LT |
140 | * fields must be set prior calling this function. |
141 | * | |
13fce806 | 142 | * Timers with an ->expires field in the past will be executed in the next |
1da177e4 LT |
143 | * timer tick. |
144 | */ | |
15d2bace | 145 | static inline void add_timer(struct timer_list *timer) |
1da177e4 | 146 | { |
15d2bace | 147 | BUG_ON(timer_pending(timer)); |
1da177e4 LT |
148 | __mod_timer(timer, timer->expires); |
149 | } | |
150 | ||
151 | #ifdef CONFIG_SMP | |
fd450b73 | 152 | extern int try_to_del_timer_sync(struct timer_list *timer); |
1da177e4 | 153 | extern int del_timer_sync(struct timer_list *timer); |
1da177e4 | 154 | #else |
fd450b73 ON |
155 | # define try_to_del_timer_sync(t) del_timer(t) |
156 | # define del_timer_sync(t) del_timer(t) | |
1da177e4 LT |
157 | #endif |
158 | ||
55c888d6 ON |
159 | #define del_singleshot_timer_sync(t) del_timer_sync(t) |
160 | ||
1da177e4 LT |
161 | extern void init_timers(void); |
162 | extern void run_local_timers(void); | |
05cfb614 | 163 | struct hrtimer; |
c9cb2e3d | 164 | extern enum hrtimer_restart it_real_fn(struct hrtimer *); |
1da177e4 | 165 | |
4c36a5de AV |
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); | |
170 | ||
171 | ||
1da177e4 | 172 | #endif |