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#ifndef _linux_POSIX_TIMERS_H
#define _linux_POSIX_TIMERS_H
#include <linux/spinlock.h>
#include <linux/list.h>
/* POSIX.1b interval timer structure. */
struct k_itimer {
struct list_head list; /* free/ allocate list */
spinlock_t it_lock;
clockid_t it_clock; /* which timer type */
timer_t it_id; /* timer id */
int it_overrun; /* overrun on pending signal */
int it_overrun_last; /* overrun on last delivered signal */
int it_requeue_pending; /* waiting to requeue this timer */
int it_sigev_notify; /* notify word of sigevent struct */
int it_sigev_signo; /* signo word of sigevent struct */
sigval_t it_sigev_value; /* value word of sigevent struct */
unsigned long it_incr; /* interval specified in jiffies */
struct task_struct *it_process; /* process to send signal to */
struct timer_list it_timer;
struct sigqueue *sigq; /* signal queue entry. */
struct list_head abs_timer_entry; /* clock abs_timer_list */
struct timespec wall_to_prev; /* wall_to_monotonic used when set */
};
struct k_clock_abs {
struct list_head list;
spinlock_t lock;
};
struct k_clock {
int res; /* in nano seconds */
struct k_clock_abs *abs_struct;
int (*clock_set) (struct timespec * tp);
int (*clock_get) (struct timespec * tp);
int (*timer_create) (struct k_itimer *timer);
int (*nsleep) (int which_clock, int flags,
struct timespec * t);
int (*timer_set) (struct k_itimer * timr, int flags,
struct itimerspec * new_setting,
struct itimerspec * old_setting);
int (*timer_del) (struct k_itimer * timr);
void (*timer_get) (struct k_itimer * timr,
struct itimerspec * cur_setting);
};
void register_posix_clock(int clock_id, struct k_clock *new_clock);
/* Error handlers for timer_create, nanosleep and settime */
int do_posix_clock_notimer_create(struct k_itimer *timer);
int do_posix_clock_nonanosleep(int which_clock, int flags, struct timespec * t);
int do_posix_clock_nosettime(struct timespec *tp);
/* function to call to trigger timer event */
int posix_timer_event(struct k_itimer *timr, int si_private);
struct now_struct {
unsigned long jiffies;
};
#define posix_get_now(now) (now)->jiffies = jiffies;
#define posix_time_before(timer, now) \
time_before((timer)->expires, (now)->jiffies)
#define posix_bump_timer(timr, now) \
do { \
long delta, orun; \
delta = now.jiffies - (timr)->it_timer.expires; \
if (delta >= 0) { \
orun = 1 + (delta / (timr)->it_incr); \
(timr)->it_timer.expires += orun * (timr)->it_incr; \
(timr)->it_overrun += orun; \
} \
}while (0)
#endif
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