Function lwp_tty_delete

components/lwp/terminal/tty_device.c:417–447

}

void lwp_tty_delete(lwp_tty_t tp)
{
    /*
     * ttyydev_leave() usually frees the i/o queues earlier, but it is
     * not always called between queue allocation and here.  The queues
     * may be allocated by ioctls on a pty control device without the
     * corresponding pty slave device ever being open, or after it is
     * closed.
     */
    ttyinq_free(&tp->t_inq);
    ttyoutq_free(&tp->t_outq);
    rt_wqueue_wakeup_all(&tp->t_inpoll, (void *)POLLHUP);
    rt_wqueue_wakeup_all(&tp->t_outpoll, (void *)POLLHUP);

#ifdef USING_BSD_POLL
    knlist_destroy(&tp->t_inpoll.si_note);
    knlist_destroy(&tp->t_outpoll.si_note);
#endif

    cv_destroy(&tp->t_inwait);
    cv_destroy(&tp->t_outwait);
    cv_destroy(&tp->t_bgwait);
    cv_destroy(&tp->t_dcdwait);
    cv_destroy(&tp->t_outserwait);

    if (tp->t_mtx == &tp->t_mtxobj)
        rt_mutex_detach(&tp->t_mtxobj);
    ttydevsw_free(tp);
    rt_device_unregister(&tp->parent);
    rt_free(tp);
}

/*
 * Report on state of foreground process group.