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;
44extern const struct k_clock clock_aux;
45
46void posix_timer_queue_signal(struct k_itimer *timr);
47
48void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting);
49int common_timer_set(struct k_itimer *timr, int flags,
50 struct itimerspec64 *new_setting,
51 struct itimerspec64 *old_setting);
52void posix_timer_set_common(struct k_itimer *timer, struct itimerspec64 *new_setting);
53int common_timer_del(struct k_itimer *timer);
54

source code of linux/kernel/time/posix-timers.h