You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: stack.rs
    path of file: ./repos/CYFS/src/component/cyfs-bdt/src/ndn
    
    the code of the file until where you have to start completion: use std::{
    time::Duration, 
    sync::{atomic::{AtomicU64, Ordering}},
};
use async_std::{
    sync::Arc, 
    task,
    future
};
use cyfs_base::*;

use crate::{
    types::*, 
    stack::{WeakStack, Stack}, 
    utils::*
};
use super::{
    channel::{self, ChannelManager}, 
    chunk::{self, ChunkManager, ChunkReader}, 
    event::*, 
    root::RootTask,
};

#[derive(Clone)]
pub struct Config {
    pub atomic_interval: Duration,  
    pub schedule_interval: 
    
    pub(crate) fn start(&self) {
        let stack = Stack::from(&self.0.stack);
        let atomic_interval = stack.config().ndn.atomic_interval;
        {
            let ndn = self.clone();
            task::spawn(async move {
                loop {
                    let start = bucky_time_now();
                    ndn.on_time_escape(start);
                    let end = bucky_time_now();
                    let escaped = Duration::from_micros(end - start);
                    if escaped < atomic_interval {
                        let _ = future::timeout(atomic_interval - escaped, future::pending::<()>()).await;
                    }
                }
            });
        }   
    }