kernel/time/posix-timers.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #define TIMER_RETRY 1
0003
0004 struct k_clock {
0005     int (*clock_getres)(const clockid_t which_clock,
0006                 struct timespec64 *tp);
0007     int (*clock_set)(const clockid_t which_clock,
0008                  const struct timespec64 *tp);
0009     /* Returns the clock value in the current time namespace. */
0010     int (*clock_get_timespec)(const clockid_t which_clock,
0011                       struct timespec64 *tp);
0012     /* Returns the clock value in the root time namespace. */
0013     ktime_t (*clock_get_ktime)(const clockid_t which_clock);
0014     int (*clock_adj)(const clockid_t which_clock, struct __kernel_timex *tx);
0015     int (*timer_create)(struct k_itimer *timer);
0016     int (*nsleep)(const clockid_t which_clock, int flags,
0017               const struct timespec64 *);
0018     int (*timer_set)(struct k_itimer *timr, int flags,
0019                  struct itimerspec64 *new_setting,
0020                  struct itimerspec64 *old_setting);
0021     int (*timer_del)(struct k_itimer *timr);
0022     void    (*timer_get)(struct k_itimer *timr,
0023                  struct itimerspec64 *cur_setting);
0024     void    (*timer_rearm)(struct k_itimer *timr);
0025     s64 (*timer_forward)(struct k_itimer *timr, ktime_t now);
0026     ktime_t (*timer_remaining)(struct k_itimer *timr, ktime_t now);
0027     int (*timer_try_to_cancel)(struct k_itimer *timr);
0028     void    (*timer_arm)(struct k_itimer *timr, ktime_t expires,
0029                  bool absolute, bool sigev_none);
0030     void    (*timer_wait_running)(struct k_itimer *timr);
0031 };
0032
0033 extern const struct k_clock clock_posix_cpu;
0034 extern const struct k_clock clock_posix_dynamic;
0035 extern const struct k_clock clock_process;
0036 extern const struct k_clock clock_thread;
0037 extern const struct k_clock alarm_clock;
0038
0039 int posix_timer_event(struct k_itimer *timr, int si_private);
0040
0041 void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting);
0042 int common_timer_set(struct k_itimer *timr, int flags,
0043              struct itimerspec64 *new_setting,
0044              struct itimerspec64 *old_setting);
0045 int common_timer_del(struct k_itimer *timer);