xref: /openbmc/linux/kernel/time/posix-timers.h (revision 9c71a2e8)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #define TIMER_RETRY 1
3 
4 struct k_clock {
5 	int	(*clock_getres)(const clockid_t which_clock,
6 				struct timespec64 *tp);
7 	int	(*clock_set)(const clockid_t which_clock,
8 			     const struct timespec64 *tp);
9 	/* Returns the clock value in the current time namespace. */
10 	int	(*clock_get_timespec)(const clockid_t which_clock,
11 				      struct timespec64 *tp);
12 	/* Returns the clock value in the root time namespace. */
13 	ktime_t	(*clock_get_ktime)(const clockid_t which_clock);
14 	int	(*clock_adj)(const clockid_t which_clock, struct __kernel_timex *tx);
15 	int	(*timer_create)(struct k_itimer *timer);
16 	int	(*nsleep)(const clockid_t which_clock, int flags,
17 			  const struct timespec64 *);
18 	int	(*timer_set)(struct k_itimer *timr, int flags,
19 			     struct itimerspec64 *new_setting,
20 			     struct itimerspec64 *old_setting);
21 	int	(*timer_del)(struct k_itimer *timr);
22 	void	(*timer_get)(struct k_itimer *timr,
23 			     struct itimerspec64 *cur_setting);
24 	void	(*timer_rearm)(struct k_itimer *timr);
25 	s64	(*timer_forward)(struct k_itimer *timr, ktime_t now);
26 	ktime_t	(*timer_remaining)(struct k_itimer *timr, ktime_t now);
27 	int	(*timer_try_to_cancel)(struct k_itimer *timr);
28 	void	(*timer_arm)(struct k_itimer *timr, ktime_t expires,
29 			     bool absolute, bool sigev_none);
30 	void	(*timer_wait_running)(struct k_itimer *timr);
31 };
32 
33 extern const struct k_clock clock_posix_cpu;
34 extern const struct k_clock clock_posix_dynamic;
35 extern const struct k_clock clock_process;
36 extern const struct k_clock clock_thread;
37 extern const struct k_clock alarm_clock;
38 
39 int posix_timer_event(struct k_itimer *timr, int si_private);
40 
41 void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting);
42 int common_timer_set(struct k_itimer *timr, int flags,
43 		     struct itimerspec64 *new_setting,
44 		     struct itimerspec64 *old_setting);
45 int common_timer_del(struct k_itimer *timer);
46