新手问个问题……

conn.rs

use std::hash::{Hash, Hasher}; use std::net; use std::sync::{Arc, Mutex}; use crate::simplehttp::options; use crate::simplehttp::server; pub struct Conn { conn: net::TcpStream, } impl Conn { pub fn new(conn: net::TcpStream) -> Self { return Conn { conn }; } pub fn handle(mut conn: Arc<Conn>) { println!("{:?}", conn.conn.peer_addr()); } } impl PartialEq<Self> for Conn { fn eq(&self, other: &Self) -> bool { return self as (*const Self) as u64 == other as (*const Self) as u64; } } impl Eq for Conn {} impl Hash for Conn { fn hash<H: Hasher>(&self, state: &mut H) { state.write_u64(self as (*const Self) as u64); } fn hash_slice<H: Hasher>(data: &[Self], state: &mut H) where Self: Sized { for datum in data { state.write_u64(datum as (*const Self) as u64); } } } 

server.rs

use std::{net, thread}; use std::borrow::BorrowMut; use std::collections::HashSet; use std::net::TcpListener; use std::ptr::NonNull; use std::sync::{Arc, Mutex}; use crate::simplehttp::conn; use crate::simplehttp::options; pub struct Server { host: String, port: u16, running: Mutex<bool>, listener: Option<Box<TcpListener>>, alive: Mutex<HashSet<Arc<conn::Conn>>>, } impl Server { pub fn new(host: String, port: u16) -> Self { return Server { host, port, running: Mutex::new(false), listener: None, alive: Mutex::new(HashSet::new()), }; } pub fn run(&mut self) { let mut running_guard = self.running.lock().unwrap(); if *running_guard { panic!("server, {}:{} is already running", self.host, self.port); } *running_guard = true; std::mem::drop(running_guard); self.listener = Some(Box::new(TcpListener::bind(format!("{}:{}", self.host, self.port)).unwrap())); println!("simplehttpserver: running @ {}:{}", self.host, self.port); for stream in self.listener.as_ref().unwrap().incoming() { match stream { Ok(stream) => { let mut cOnn= Arc::new(conn::Conn::new(stream)); let mut alive_guard = self.alive.lock().unwrap(); // (*alive_guard).insert(conn.clone()); std::mem::drop(alive_guard); let mut new_cOnn= conn.clone(); thread::spawn(move || { conn::Conn::handle(new_conn); }); } Err(e) => { println!("connection error: {:?}", e); } } } } } 

怎么才能做到 Conn 持有 Server 的 Arc 呀？ 我想要 Conn::handle 结束之后，删除在 Server.alive 中的记录。