include/linux/timer.h


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#ifndef _LINUX_TIMER_H
#define _LINUX_TIMER_H

#include <linux/config.h>
#include <linux/list.h>

struct tvec_t_base_s;

struct timer_list {
	struct list_head entry;
	unsigned long expires;

	void (*function)(unsigned long);
	unsigned long data;

	struct tvec_t_base_s *base;
};

/***
 * init_timer - initialize a timer.
 * @timer: the timer to be initialized
 *
 * init_timer() must be done to a timer prior calling *any* of the
 * other timer functions.
 */
static inline void init_timer(struct timer_list * timer)
{
	timer->base = NULL;
}

/***
 * 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->base != NULL;
}

extern void add_timer(struct timer_list * timer);
extern int del_timer(struct timer_list * timer);
extern int mod_timer(struct timer_list *timer, unsigned long expires);
  
#if CONFIG_SMP
  extern int del_timer_sync(struct timer_list * timer);
#else
# define del_timer_sync(t) del_timer(t)
#endif

extern void init_timers(void);
extern void run_local_timers(void);
extern void it_real_fn(unsigned long);

#endif