timer.h
上传用户:szlgq88
上传日期:2009-04-28
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文件大小:2k
- #ifndef _LINUX_TIMER_H
- #define _LINUX_TIMER_H
- #include <linux/config.h>
- #include <linux/list.h>
- #include <linux/spinlock.h>
- #include <linux/stddef.h>
- struct timer_base_s;
- struct timer_list {
- struct list_head entry;
- unsigned long expires;
- unsigned long magic;
- void (*function)(unsigned long);
- unsigned long data;
- struct timer_base_s *base;
- };
- #define TIMER_MAGIC 0x4b87ad6e
- extern struct timer_base_s __init_timer_base;
- #define TIMER_INITIALIZER(_function, _expires, _data) {
- .function = (_function),
- .expires = (_expires),
- .data = (_data),
- .base = &__init_timer_base,
- .magic = TIMER_MAGIC,
- }
- #define DEFINE_TIMER(_name, _function, _expires, _data)
- struct timer_list _name =
- TIMER_INITIALIZER(_function, _expires, _data)
- void fastcall init_timer(struct timer_list * timer);
- /***
- * timer_pending - is a timer pending?
- * @timer: the timer in question
- *
- * timer_pending will tell whether a given timer is currently pending,
- * or not. Callers must ensure serialization wrt. other operations done
- * to this timer, eg. interrupt contexts, or other CPUs on SMP.
- *
- * return value: 1 if the timer is pending, 0 if not.
- */
- static inline int timer_pending(const struct timer_list * timer)
- {
- return timer->entry.next != NULL;
- }
- extern void add_timer_on(struct timer_list *timer, int cpu);
- extern int del_timer(struct timer_list * timer);
- extern int __mod_timer(struct timer_list *timer, unsigned long expires);
- extern int mod_timer(struct timer_list *timer, unsigned long expires);
- extern unsigned long next_timer_interrupt(void);
- /***
- * add_timer - start a timer
- * @timer: the timer to be added
- *
- * The kernel will do a ->function(->data) callback from the
- * timer interrupt at the ->expired point in the future. The
- * current time is 'jiffies'.
- *
- * The timer's ->expired, ->function (and if the handler uses it, ->data)
- * fields must be set prior calling this function.
- *
- * Timers with an ->expired field in the past will be executed in the next
- * timer tick.
- */
- static inline void add_timer(struct timer_list * timer)
- {
- __mod_timer(timer, timer->expires);
- }
- #ifdef CONFIG_SMP
- extern int try_to_del_timer_sync(struct timer_list *timer);
- extern int del_timer_sync(struct timer_list *timer);
- #else
- # define try_to_del_timer_sync(t) del_timer(t)
- # define del_timer_sync(t) del_timer(t)
- #endif
- #define del_singleshot_timer_sync(t) del_timer_sync(t)
- extern void init_timers(void);
- extern void run_local_timers(void);
- extern void it_real_fn(unsigned long);
- #endif