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use async_ready::{AsyncReady, TakeError};
use futures_core::Stream;
use futures_util::ready;
use std::fmt;
use std::io;
use std::os::unix::io::{AsRawFd, RawFd};
use std::os::unix::net::{self, SocketAddr};
use std::path::Path;
use std::pin::Pin;
use std::task::{Context, Poll};
use super::UnixStream;
use crate::lxar;
use crate::net::reactor::PollEvented;
pub struct UnixListener {
io: PollEvented<lxar::net::UnixListener>,
}
impl UnixListener {
pub fn bind(path: impl AsRef<Path>) -> io::Result<UnixListener> {
let listener = lxar::net::UnixListener::bind(path)?;
let io = PollEvented::new(listener);
Ok(UnixListener { io })
}
pub fn local_addr(&self) -> io::Result<SocketAddr> {
self.io.get_ref().local_addr()
}
pub fn incoming(self) -> Incoming {
Incoming::new(self)
}
fn poll_accept_std(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
) -> Poll<io::Result<(net::UnixStream, SocketAddr)>> {
ready!(Pin::new(&mut self.io).poll_read_ready(cx)?);
match Pin::new(&mut self.io).get_ref().accept_std() {
Ok(Some((sock, addr))) => Poll::Ready(Ok((sock, addr))),
Ok(None) => {
Pin::new(&mut self.io).clear_read_ready(cx)?;
Poll::Pending
}
Err(ref err) if err.kind() == io::ErrorKind::WouldBlock => {
Pin::new(&mut self.io).clear_read_ready(cx)?;
Poll::Pending
}
Err(err) => Poll::Ready(Err(err)),
}
}
}
impl AsyncReady for UnixListener {
type Ok = (UnixStream, 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 = lxar::net::UnixStream::from_stream(io)?;
Poll::Ready(Ok((UnixStream::new(io), addr)))
}
}
impl TakeError for UnixListener {
type Ok = io::Error;
type Err = io::Error;
fn take_error(&self) -> Result<Option<Self::Ok>, Self::Err> {
self.io.get_ref().take_error()
}
}
impl fmt::Debug for UnixListener {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.io.get_ref().fmt(f)
}
}
impl AsRawFd for UnixListener {
fn as_raw_fd(&self) -> RawFd {
self.io.get_ref().as_raw_fd()
}
}
#[derive(Debug)]
pub struct Incoming {
inner: UnixListener,
}
impl Incoming {
pub(crate) fn new(listener: UnixListener) -> Incoming {
Incoming { inner: listener }
}
}
impl Stream for Incoming {
type Item = io::Result<UnixStream>;
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)))
}
}