kernel/time/posix-timers.h

   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);