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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
-
-