Function _timer_check

src/timer.c:488–553

* @brief This function will check timer list, if a timeout event happens, * the corresponding timeout function will be invoked. * * @param timer_list The timer list to check. * @param lock The lock for the timer list. */

 * @param lock The lock for the timer list.
 */
static void _timer_check(rt_list_t *timer_list, struct rt_spinlock *lock)
{
    struct rt_timer *t;
    rt_tick_t current_tick;
    rt_base_t level;
    rt_list_t list;

    level = rt_spin_lock_irqsave(lock);

    current_tick = rt_tick_get();

    rt_list_init(&list);

    while (!rt_list_isempty(&timer_list[RT_TIMER_SKIP_LIST_LEVEL - 1]))
    {
        t = rt_list_entry(timer_list[RT_TIMER_SKIP_LIST_LEVEL - 1].next,
                          struct rt_timer, row[RT_TIMER_SKIP_LIST_LEVEL - 1]);

        /* re-get tick */
        current_tick = rt_tick_get();

        /*
         * It supposes that the new tick shall less than the half duration of
         * tick max.
         */
        if ((current_tick - t->timeout_tick) < RT_TICK_MAX / 2)
        {
            RT_OBJECT_HOOK_CALL(rt_timer_enter_hook, (t));

            /* remove timer from timer list firstly */
            _timer_remove(t);
            if (!(t->parent.flag & RT_TIMER_FLAG_PERIODIC))
            {
                t->parent.flag &= ~RT_TIMER_FLAG_ACTIVATED;
            }

            /* add timer to temporary list  */
            rt_list_insert_after(&list, &(t->row[RT_TIMER_SKIP_LIST_LEVEL - 1]));

            rt_spin_unlock_irqrestore(lock, level);

            /* call timeout function */
            t->timeout_func(t->parameter);

            RT_OBJECT_HOOK_CALL(rt_timer_exit_hook, (t));

            level = rt_spin_lock_irqsave(lock);

            /* Check whether the timer object is detached or started again */
            if (rt_list_isempty(&list))
            {
                continue;
            }
            rt_list_remove(&(t->row[RT_TIMER_SKIP_LIST_LEVEL - 1]));
            if ((t->parent.flag & RT_TIMER_FLAG_PERIODIC) &&
                (t->parent.flag & RT_TIMER_FLAG_ACTIVATED))
            {
                /* start it */