Function _thread_sleep

src/thread.c:642–694

* @brief This function will let current thread sleep for some ticks. Change current thread state to suspend, * when the thread timer reaches the tick value, scheduler will awaken this thread. * * @param tick is the sleep ticks. * * @return Return the operation status. If the return value is RT_EOK, the function is successfully executed. * If the return value is any oth

 *          If the return value is any other values, it means this operation failed.
 */
static rt_err_t _thread_sleep(rt_tick_t tick)
{
    struct rt_thread *thread;
    rt_base_t critical_level;
    int err;

    if (tick == 0)
    {
        return -RT_EINVAL;
    }

    /* set to current thread */
    thread = rt_thread_self();
    RT_ASSERT(thread != RT_NULL);
    RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);

    /* current context checking */
    RT_DEBUG_SCHEDULER_AVAILABLE(RT_TRUE);

    /* reset thread error */
    thread->error = RT_EOK;

    /* lock scheduler since current thread may be suspended */
    critical_level = rt_enter_critical();

    /* suspend thread */
    err = rt_thread_suspend_with_flag(thread, RT_INTERRUPTIBLE);

    /* reset the timeout of thread timer and start it */
    if (err == RT_EOK)
    {
        rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME, &tick);
        rt_timer_start(&(thread->thread_timer));

        thread->error = -RT_EINTR;

        /* notify a pending rescheduling */
        rt_schedule();

        /* exit critical and do a rescheduling */
        rt_exit_critical_safe(critical_level);

        /* clear error number of this thread to RT_EOK */
        if (thread->error == -RT_ETIMEOUT)
            thread->error = RT_EOK;
    }
    else
    {
        rt_exit_critical_safe(critical_level);
    }

    return err;
}

/**
 * @brief   This function will let current thread delay for some ticks.