Function channel_fops_close

components/lwp/lwp_ipc.c:1036–1073

}

static int channel_fops_close(struct dfs_file *file)
{
    rt_channel_t ch;
    rt_base_t level;
    RT_DEBUG_NOT_IN_INTERRUPT;

    ch = (rt_channel_t)file->vnode->data;

    level = rt_spin_lock_irqsave(&ch->slock);

    if (file->vnode->ref_count == 1)
    {
        ch->ref--;
        if (ch->ref == 0)
        {
            /* wakeup all the suspended receivers and senders */
            _channel_list_resume_all_locked(&ch->parent.suspend_thread);
            _channel_list_resume_all_locked(&ch->wait_thread);

            /* all ipc msg will lost */
            rt_list_init(&ch->wait_msg);

            rt_spin_unlock_irqrestore(&ch->slock, level);

            rt_object_delete(&ch->parent.parent); /* release the IPC channel structure */
        }
        else
        {
            rt_spin_unlock_irqrestore(&ch->slock, level);
        }
    }
    else
    {
        rt_spin_unlock_irqrestore(&ch->slock, level);
    }

    return 0;
}

static const struct dfs_file_ops channel_fops =
{