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use async_ready::AsyncReady;
use futures_core::stream::Stream;
use futures_util::ready;
use std::fmt;
use std::io;
use std::net::{self, SocketAddr};
use std::pin::Pin;
use std::task::{Context, Poll};
use super::TcpStream;
use crate::driver::sys;
use crate::driver::PollEvented;
pub struct TcpListener {
io: PollEvented<sys::net::TcpListener>,
}
impl TcpListener {
pub fn bind(addr: &SocketAddr) -> io::Result<TcpListener> {
let l = sys::net::TcpListener::bind(addr)?;
Ok(TcpListener::new(l))
}
fn new(listener: sys::net::TcpListener) -> TcpListener {
let io = PollEvented::new(listener);
TcpListener { io }
}
pub fn local_addr(&self) -> io::Result<SocketAddr> {
self.io.get_ref().local_addr()
}
pub fn incoming(&mut self) -> Incoming<'_> {
Incoming { inner: self }
}
pub fn ttl(&self) -> io::Result<u32> {
self.io.get_ref().ttl()
}
pub fn set_ttl(&self, ttl: u32) -> io::Result<()> {
self.io.get_ref().set_ttl(ttl)
}
fn poll_accept_std(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
) -> Poll<io::Result<(net::TcpStream, SocketAddr)>> {
ready!(Pin::new(&mut self.io).poll_read_ready(cx)?);
match Pin::new(&mut self.io).get_ref().accept_std() {
Ok(pair) => Poll::Ready(Ok(pair)),
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
Pin::new(&mut self.io).clear_read_ready(cx)?;
Poll::Pending
}
Err(e) => Poll::Ready(Err(e)),
}
}
}
impl AsyncReady for TcpListener {
type Ok = (TcpStream, SocketAddr);
type Err = std::io::Error;
fn poll_ready(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
) -> Poll<Result<Self::Ok, Self::Err>> {
let (io, addr) = ready!(self.poll_accept_std(cx)?);
let io = sys::net::TcpStream::from_stream(io)?;
let io = TcpStream::new(io);
Poll::Ready(Ok((io, addr)))
}
}
impl fmt::Debug for TcpListener {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.io.get_ref().fmt(f)
}
}
#[must_use = "streams do nothing unless polled"]
#[derive(Debug)]
pub struct Incoming<'a> {
inner: &'a mut TcpListener,
}
impl<'a> Stream for Incoming<'a> {
type Item = io::Result<TcpStream>;
fn poll_next(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
) -> Poll<Option<Self::Item>> {
let (socket, _) = ready!(Pin::new(&mut *self.inner).poll_ready(cx)?);
Poll::Ready(Some(Ok(socket)))
}
}
use std::os::unix::prelude::*;
impl AsRawFd for TcpListener {
fn as_raw_fd(&self) -> RawFd {
self.io.get_ref().as_raw_fd()
}
}