1/* SPDX-License-Identifier: GPL-2.0 */
 2#define TIMER_RETRY 1
 3
 4enum posix_timer_state {
 5	POSIX_TIMER_DISARMED,
 6	POSIX_TIMER_ARMED,
 7	POSIX_TIMER_REQUEUE_PENDING,
 8};
 9
10struct k_clock {
11	int	(*clock_getres)(const clockid_t which_clock,
12				struct timespec64 *tp);
13	int	(*clock_set)(const clockid_t which_clock,
14			     const struct timespec64 *tp);
15	/* Returns the clock value in the current time namespace. */
16	int	(*clock_get_timespec)(const clockid_t which_clock,
17				      struct timespec64 *tp);
18	/* Returns the clock value in the root time namespace. */
19	ktime_t	(*clock_get_ktime)(const clockid_t which_clock);
20	int	(*clock_adj)(const clockid_t which_clock, struct __kernel_timex *tx);
21	int	(*timer_create)(struct k_itimer *timer);
22	int	(*nsleep)(const clockid_t which_clock, int flags,
23			  const struct timespec64 *);
24	int	(*timer_set)(struct k_itimer *timr, int flags,
25			     struct itimerspec64 *new_setting,
26			     struct itimerspec64 *old_setting);
27	int	(*timer_del)(struct k_itimer *timr);
28	void	(*timer_get)(struct k_itimer *timr,
29			     struct itimerspec64 *cur_setting);
30	void	(*timer_rearm)(struct k_itimer *timr);
31	s64	(*timer_forward)(struct k_itimer *timr, ktime_t now);
32	ktime_t	(*timer_remaining)(struct k_itimer *timr, ktime_t now);
33	int	(*timer_try_to_cancel)(struct k_itimer *timr);
34	void	(*timer_arm)(struct k_itimer *timr, ktime_t expires,
35			     bool absolute, bool sigev_none);
36	void	(*timer_wait_running)(struct k_itimer *timr);
37};
38
39extern const struct k_clock clock_posix_cpu;
40extern const struct k_clock clock_posix_dynamic;
41extern const struct k_clock clock_process;
42extern const struct k_clock clock_thread;
43extern const struct k_clock alarm_clock;
44
45void posix_timer_queue_signal(struct k_itimer *timr);
46
47void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting);
48int common_timer_set(struct k_itimer *timr, int flags,
49		     struct itimerspec64 *new_setting,
50		     struct itimerspec64 *old_setting);
51void posix_timer_set_common(struct k_itimer *timer, struct itimerspec64 *new_setting);
52int common_timer_del(struct k_itimer *timer);