Function rt_susp_list_dequeue

src/ipc.c:105–146

* @brief Dequeue a thread from suspended list and set it to ready. The 2 are * taken as an atomic operation, so if a thread is returned, it's * resumed by us, not any other threads or async events. This is useful * if a consumer may be resumed by timeout, signals... besides its * producer. * * @param susp_list the list thread dequeued from. RT_NULL if

 * @return  struct rt_thread * RT_NULL if failed, otherwise the thread resumed
 */
struct rt_thread *rt_susp_list_dequeue(rt_list_t *susp_list, rt_err_t thread_error)
{
    rt_sched_lock_level_t slvl;
    rt_thread_t thread;
    rt_err_t error;

    RT_SCHED_DEBUG_IS_UNLOCKED;
    RT_ASSERT(susp_list != RT_NULL);

    rt_sched_lock(&slvl);
    if (!rt_list_isempty(susp_list))
    {
        thread = RT_THREAD_LIST_NODE_ENTRY(susp_list->next);
        error = rt_sched_thread_ready(thread);

        if (error)
        {
            LOG_D("%s [error:%d] failed to resume thread:%p from suspended list",
                  __func__, error, thread);

            thread = RT_NULL;
        }
        else
        {
            /* thread error should not be a negative value */
            if (thread_error >= 0)
            {
                /* set thread error code to notified resuming thread */
                thread->error = thread_error;
            }
        }
    }
    else
    {
        thread = RT_NULL;
    }
    rt_sched_unlock(slvl);

    LOG_D("resume thread:%s\n", thread->parent.name);

    return thread;
}


/**