Function rt_wqueue_wakeup

components/drivers/ipc/waitqueue.c:80–123

* @brief This function will wake up a pending thread on the specified * waiting queue that meets the conditions. * * @param queue is a pointer to the wait queue. * * @param key is the wakeup conditions, but it is not effective now, because * default wakeup function always return 0. * If user wants to use it, user should define their own wakeup function. */

 *           If user wants to use it, user should define their own wakeup function.
 */
void rt_wqueue_wakeup(rt_wqueue_t *queue, void *key)
{
    rt_base_t level;
    int need_schedule = 0;

    rt_list_t *queue_list;
    struct rt_list_node *node;
    struct rt_wqueue_node *entry;

    queue_list = &(queue->waiting_list);

    level = rt_spin_lock_irqsave(&(queue->spinlock));
    /* set wakeup flag in the queue */
    queue->flag = RT_WQ_FLAG_WAKEUP;

    if (!(rt_list_isempty(queue_list)))
    {
        for (node = queue_list->next; node != queue_list; node = node->next)
        {
            entry = rt_list_entry(node, struct rt_wqueue_node, list);
            if (entry->wakeup(entry, key) == 0)
            {
                /**
                 * even though another thread may interrupt the thread and
                 * wakeup it meanwhile, we can asuume that condition is ready
                 */
                entry->polling_thread->error = RT_EOK;
                if (!rt_thread_resume(entry->polling_thread))
                {
                    need_schedule = 1;

                    rt_list_remove(&(entry->list));

                    break;
                }
            }
        }
    }
    rt_spin_unlock_irqrestore(&(queue->spinlock), level);
    if (need_schedule)
        rt_schedule();

    return;
}

/**
 * @brief    This function will wake up all pending thread on the specified