现在还有另一个 mio crate,它具有与通道相关的功能:
mio-extras https://github.com/dimbleby/mio-extras
因此,您所要做的就是将该箱子添加到您的 Cargo.toml 中[dependencies]
.
然后,在你的main.rs
, add extern crate mio_extras
您应该已准备好一切以供使用。
因此,如果我添加到问题中的代码片段,它最终看起来像这样:
extern crate mio;
extern crate mio_extras;
use std::io;
use mio::*;
use mio::net::*;
use mio_extras::channel::*;
use std::thread::*;
fn guard_external_tcp_port( rx : mio_extras::channel::Receiver::<u8>) -> () {
let poll = Poll::new().expect("could not create a new Poll instance.");
const QUIT : Token = Token(0);
const CONNECT : Token = Token(1);
let mut events = Events::with_capacity(5);
poll.register(&rx,QUIT,Ready::readable(),PollOpt::level() ).expect("could not register channel Receiver.");
let addr : std::net::SocketAddr = "127.0.0.1:8384".parse().unwrap();
let listener = TcpListener::bind(&addr).expect("tcp guard - bind failed!");
poll.register(&listener,CONNECT,Ready::all(),PollOpt::edge()).expect("could not register our listening socket.");
let mut running : bool = true;
//listener.set_nonblocking(true).expect("cannot set tcp listener to nonblocking!");
while running {
let _nevents = poll.poll(&mut events,None).unwrap();
println!("poll returned!");
for event in &events {
match event.token() {
QUIT => running = false,
CONNECT => {
match listener.accept() {
Ok((_s,pa)) => {
println!("tcp client connected: {} - closing it down."
, pa);
}
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
//wait_for_fd();
continue;
}
Err(e) => panic!("encountered IO error: {}", e),
}
},
Token(_) => continue
}
}
}
}
fn start_tcpguard() -> (JoinHandle<()>,Sender::<u8>) {
let (tx,rx) = mio_extras::channel::channel::<u8>();
let thrd = spawn(move || {
guard_external_tcp_port(rx);
});
(thrd,tx)
}
我也尝试过sync_channel(0)
版本,但它无法按预期工作。不过,就轮询接收关闭事件而言,上面代码中的版本是有效的。