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#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 tvec_t_base_s;
struct timer_list {
struct list_head entry;
unsigned long expires;
spinlock_t lock;
unsigned long magic;
void (*function)(unsigned long);
unsigned long data;
struct tvec_t_base_s *base;
};
#define TIMER_MAGIC 0x4b87ad6e
#define TIMER_INITIALIZER(_function, _expires, _data) { \
.function = (_function), \
.expires = (_expires), \
.data = (_data), \
.base = NULL, \
.magic = TIMER_MAGIC, \
.lock = SPIN_LOCK_UNLOCKED, \
}
/***
* 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->magic = TIMER_MAGIC;
spin_lock_init(&timer->lock);
}
/***
* 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_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 del_timer_sync(struct timer_list *timer);
extern int del_singleshot_timer_sync(struct timer_list *timer);
#else
# define del_timer_sync(t) del_timer(t)
# define del_singleshot_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
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