254 lines
7.0 KiB
C
254 lines
7.0 KiB
C
#ifndef _LINUX_TIMER_H
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#define _LINUX_TIMER_H
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#include <linux/list.h>
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#include <linux/ktime.h>
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#include <linux/stddef.h>
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#include <linux/debugobjects.h>
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#include <linux/stringify.h>
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struct tvec_base;
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struct timer_list {
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struct list_head entry;
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unsigned long expires;
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void (*function)(unsigned long);
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unsigned long data;
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struct tvec_base *base;
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#ifdef CONFIG_TIMER_STATS
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void *start_site;
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char start_comm[16];
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int start_pid;
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#endif
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#ifdef CONFIG_LOCKDEP
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struct lockdep_map lockdep_map;
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#endif
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};
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extern struct tvec_base boot_tvec_bases;
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#ifdef CONFIG_LOCKDEP
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/*
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* NB: because we have to copy the lockdep_map, setting the lockdep_map key
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* (second argument) here is required, otherwise it could be initialised to
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* the copy of the lockdep_map later! We use the pointer to and the string
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* "<file>:<line>" as the key resp. the name of the lockdep_map.
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*/
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#define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn) \
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.lockdep_map = STATIC_LOCKDEP_MAP_INIT(_kn, &_kn),
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#else
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#define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn)
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#endif
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#define TIMER_INITIALIZER(_function, _expires, _data) { \
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.entry = { .prev = TIMER_ENTRY_STATIC }, \
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.function = (_function), \
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.expires = (_expires), \
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.data = (_data), \
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.base = &boot_tvec_bases, \
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__TIMER_LOCKDEP_MAP_INITIALIZER( \
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__FILE__ ":" __stringify(__LINE__)) \
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}
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#define DEFINE_TIMER(_name, _function, _expires, _data) \
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struct timer_list _name = \
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TIMER_INITIALIZER(_function, _expires, _data)
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void init_timer_key(struct timer_list *timer,
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const char *name,
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struct lock_class_key *key);
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void init_timer_deferrable_key(struct timer_list *timer,
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const char *name,
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struct lock_class_key *key);
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#ifdef CONFIG_LOCKDEP
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#define init_timer(timer) \
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do { \
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static struct lock_class_key __key; \
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init_timer_key((timer), #timer, &__key); \
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} while (0)
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#define init_timer_deferrable(timer) \
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do { \
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static struct lock_class_key __key; \
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init_timer_deferrable_key((timer), #timer, &__key); \
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} while (0)
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#define init_timer_on_stack(timer) \
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do { \
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static struct lock_class_key __key; \
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init_timer_on_stack_key((timer), #timer, &__key); \
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} while (0)
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#define setup_timer(timer, fn, data) \
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do { \
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static struct lock_class_key __key; \
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setup_timer_key((timer), #timer, &__key, (fn), (data));\
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} while (0)
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#define setup_timer_on_stack(timer, fn, data) \
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do { \
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static struct lock_class_key __key; \
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setup_timer_on_stack_key((timer), #timer, &__key, \
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(fn), (data)); \
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} while (0)
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#else
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#define init_timer(timer)\
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init_timer_key((timer), NULL, NULL)
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#define init_timer_deferrable(timer)\
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init_timer_deferrable_key((timer), NULL, NULL)
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#define init_timer_on_stack(timer)\
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init_timer_on_stack_key((timer), NULL, NULL)
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#define setup_timer(timer, fn, data)\
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setup_timer_key((timer), NULL, NULL, (fn), (data))
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#define setup_timer_on_stack(timer, fn, data)\
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setup_timer_on_stack_key((timer), NULL, NULL, (fn), (data))
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#endif
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#ifdef CONFIG_DEBUG_OBJECTS_TIMERS
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extern void init_timer_on_stack_key(struct timer_list *timer,
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const char *name,
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struct lock_class_key *key);
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extern void destroy_timer_on_stack(struct timer_list *timer);
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#else
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static inline void destroy_timer_on_stack(struct timer_list *timer) { }
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static inline void init_timer_on_stack_key(struct timer_list *timer,
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const char *name,
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struct lock_class_key *key)
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{
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init_timer_key(timer, name, key);
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}
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#endif
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static inline void setup_timer_key(struct timer_list * timer,
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const char *name,
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struct lock_class_key *key,
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void (*function)(unsigned long),
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unsigned long data)
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{
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timer->function = function;
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timer->data = data;
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init_timer_key(timer, name, key);
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}
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static inline void setup_timer_on_stack_key(struct timer_list *timer,
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const char *name,
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struct lock_class_key *key,
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void (*function)(unsigned long),
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unsigned long data)
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{
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timer->function = function;
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timer->data = data;
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init_timer_on_stack_key(timer, name, key);
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}
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/**
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* timer_pending - is a timer pending?
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* @timer: the timer in question
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*
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* timer_pending will tell whether a given timer is currently pending,
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* or not. Callers must ensure serialization wrt. other operations done
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* to this timer, eg. interrupt contexts, or other CPUs on SMP.
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*
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* return value: 1 if the timer is pending, 0 if not.
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*/
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static inline int timer_pending(const struct timer_list * timer)
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{
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return timer->entry.next != NULL;
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}
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extern void add_timer_on(struct timer_list *timer, int cpu);
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extern int del_timer(struct timer_list * timer);
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extern int mod_timer(struct timer_list *timer, unsigned long expires);
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extern int mod_timer_pending(struct timer_list *timer, unsigned long expires);
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extern int mod_timer_pinned(struct timer_list *timer, unsigned long expires);
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#define TIMER_NOT_PINNED 0
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#define TIMER_PINNED 1
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/*
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* The jiffies value which is added to now, when there is no timer
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* in the timer wheel:
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*/
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#define NEXT_TIMER_MAX_DELTA ((1UL << 30) - 1)
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/*
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* Return when the next timer-wheel timeout occurs (in absolute jiffies),
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* locks the timer base and does the comparison against the given
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* jiffie.
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*/
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extern unsigned long get_next_timer_interrupt(unsigned long now);
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/*
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* Timer-statistics info:
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*/
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#ifdef CONFIG_TIMER_STATS
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extern int timer_stats_active;
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#define TIMER_STATS_FLAG_DEFERRABLE 0x1
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extern void init_timer_stats(void);
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extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
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void *timerf, char *comm,
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unsigned int timer_flag);
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extern void __timer_stats_timer_set_start_info(struct timer_list *timer,
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void *addr);
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static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
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{
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if (likely(!timer_stats_active))
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return;
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__timer_stats_timer_set_start_info(timer, __builtin_return_address(0));
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}
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static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
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{
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timer->start_site = NULL;
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}
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#else
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static inline void init_timer_stats(void)
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{
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}
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static inline void timer_stats_timer_set_start_info(struct timer_list *timer)
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{
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}
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static inline void timer_stats_timer_clear_start_info(struct timer_list *timer)
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{
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}
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#endif
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extern void add_timer(struct timer_list *timer);
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#ifdef CONFIG_SMP
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extern int try_to_del_timer_sync(struct timer_list *timer);
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extern int del_timer_sync(struct timer_list *timer);
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#else
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# define try_to_del_timer_sync(t) del_timer(t)
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# define del_timer_sync(t) del_timer(t)
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#endif
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#define del_singleshot_timer_sync(t) del_timer_sync(t)
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extern void init_timers(void);
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extern void run_local_timers(void);
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struct hrtimer;
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extern enum hrtimer_restart it_real_fn(struct hrtimer *);
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unsigned long __round_jiffies(unsigned long j, int cpu);
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unsigned long __round_jiffies_relative(unsigned long j, int cpu);
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unsigned long round_jiffies(unsigned long j);
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unsigned long round_jiffies_relative(unsigned long j);
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unsigned long __round_jiffies_up(unsigned long j, int cpu);
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unsigned long __round_jiffies_up_relative(unsigned long j, int cpu);
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unsigned long round_jiffies_up(unsigned long j);
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unsigned long round_jiffies_up_relative(unsigned long j);
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#endif
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