kernel/time/posix-timers.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #define TIMER_RETRY 1
   3
   4 enum posix_timer_state {
   5         POSIX_TIMER_DISARMED,
   6         POSIX_TIMER_ARMED,
   7         POSIX_TIMER_REQUEUE_PENDING,
   8 };
   9
  10 struct 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
  39 extern const struct k_clock clock_posix_cpu;
  40 extern const struct k_clock clock_posix_dynamic;
  41 extern const struct k_clock clock_process;
  42 extern const struct k_clock clock_thread;
  43 extern const struct k_clock alarm_clock;
  44
  45 void posix_timer_queue_signal(struct k_itimer *timr);
  46
  47 void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting);
  48 int common_timer_set(struct k_itimer *timr, int flags,
  49                      struct itimerspec64 *new_setting,
  50                      struct itimerspec64 *old_setting);
  51 void posix_timer_set_common(struct k_itimer *timer, struct itimerspec64 *new_setting);
  52 int common_timer_del(struct k_itimer *timer);