Function _suspend_thread_timeout_locked

components/lwp/lwp_futex.c:440–465

* @brief Suspend a thread with timeout and add it to futex waiting list * * @param[in] thread Thread to suspend * @param[in] futex Futex to add thread to waiting list * @param[in] timeout Timeout value in ticks * * @return RT_EOK on success, error code on failure * * @note This function: * - Adds thread to futex's waiting_thread list (FIFO order) * - Sets thread timer with sp

 *       - Sets errno to ETIMEDOUT on success
 */
static rt_err_t _suspend_thread_timeout_locked(rt_thread_t thread,
                                               rt_futex_t futex,
                                               rt_tick_t timeout)
{
    rt_err_t rc;

    /**
     * Brief: Add current thread into futex waiting thread list
     *
     * Note: Critical Section
     * - the futex waiting_thread list (RW)
     */
    rc = rt_thread_suspend_to_list(thread, &futex->waiting_thread,
                                   RT_IPC_FLAG_FIFO, RT_INTERRUPTIBLE);

    if (rc == RT_EOK)
    {
        /* start the timer of thread */
        rt_timer_control(&(thread->thread_timer), RT_TIMER_CTRL_SET_TIME,
                         &timeout);
        rt_timer_start(&(thread->thread_timer));
        rt_set_errno(ETIMEDOUT);
    }

    return rc;
}

/**
 * @brief Add current thread into futex waiting thread list