/* SPDX-License-Identifier: GPL-2.0 */
#define TIMER_RETRY 1

enum posix_timer_state {
        POSIX_TIMER_DISARMED,
        POSIX_TIMER_ARMED,
        POSIX_TIMER_REQUEUE_PENDING,
};

struct k_clock {
        int     (*clock_getres)(const clockid_t which_clock,
                                struct timespec64 *tp);
        int     (*clock_set)(const clockid_t which_clock,
                             const struct timespec64 *tp);
        /* Returns the clock value in the current time namespace. */
        int     (*clock_get_timespec)(const clockid_t which_clock,
                                      struct timespec64 *tp);
        /* Returns the clock value in the root time namespace. */
        ktime_t (*clock_get_ktime)(const clockid_t which_clock);
        int     (*clock_adj)(const clockid_t which_clock, struct __kernel_timex *tx);
        int     (*timer_create)(struct k_itimer *timer);
        int     (*nsleep)(const clockid_t which_clock, int flags,
                          const struct timespec64 *);
        int     (*timer_set)(struct k_itimer *timr, int flags,
                             struct itimerspec64 *new_setting,
                             struct itimerspec64 *old_setting);
        int     (*timer_del)(struct k_itimer *timr);
        void    (*timer_get)(struct k_itimer *timr,
                             struct itimerspec64 *cur_setting);
        void    (*timer_rearm)(struct k_itimer *timr);
        s64     (*timer_forward)(struct k_itimer *timr, ktime_t now);
        ktime_t (*timer_remaining)(struct k_itimer *timr, ktime_t now);
        int     (*timer_try_to_cancel)(struct k_itimer *timr);
        void    (*timer_arm)(struct k_itimer *timr, ktime_t expires,
                             bool absolute, bool sigev_none);
        void    (*timer_wait_running)(struct k_itimer *timr);
};

extern const struct k_clock clock_posix_cpu;
extern const struct k_clock clock_posix_dynamic;
extern const struct k_clock clock_process;
extern const struct k_clock clock_thread;
extern const struct k_clock alarm_clock;
extern const struct k_clock clock_aux;

void posix_timer_queue_signal(struct k_itimer *timr);

void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting);
int common_timer_set(struct k_itimer *timr, int flags,
                     struct itimerspec64 *new_setting,
                     struct itimerspec64 *old_setting);
void posix_timer_set_common(struct k_itimer *timer, struct itimerspec64 *new_setting);
int common_timer_del(struct k_itimer *timer);