Function _check_and_update_prio

src/ipc.c:923–944

}

static rt_bool_t _check_and_update_prio(rt_thread_t thread, rt_mutex_t mutex)
{
    RT_SCHED_DEBUG_IS_LOCKED;
    rt_bool_t do_sched = RT_FALSE;

    if ((mutex->ceiling_priority != 0xFF) || (rt_sched_thread_get_curr_prio(thread) == mutex->priority))
    {
        rt_uint8_t priority = 0xff;

        /* get the highest priority in the taken list of thread */
        priority = _thread_get_mutex_priority(thread);

        rt_sched_thread_change_priority(thread, priority);

        /**
         * notify a pending reschedule. Since scheduler is locked, we will not
         * really do a re-schedule at this point
         */
        do_sched = RT_TRUE;
    }
    return do_sched;
}

static void _mutex_before_delete_detach(rt_mutex_t mutex)
{