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    use crate::io_source::IoSource;
    use crate::{event, sys, Interest, Registry, Token};

    use std::fmt;
    use std::io::{self, IoSlice, IoSliceMut, Read, Write};
    use std::net::Shutdown;
    use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
    use std::os::unix::net;
    use std::path::Path;

    /// A non-blocking Unix stream socket.
    pub struct UnixStream {
        inner: IoSource<net::UnixStream>,
    }

    impl UnixStream {
        /// Connects to the socket named by `path`.
        pub fn connect<P: AsRef<Path>>(path: P) -> io::Result<UnixStream> {
            sys::uds::stream::connect(path.as_ref()).map(UnixStream::from_std)
        }

        /// Creates a new `UnixStream` from a standard `net::UnixStream`.
        ///
        /// This function is intended to be used to wrap a Unix stream from the
        /// standard library in the Mio equivalent. The conversion assumes nothing
        /// about the underlying stream; it is left up to the user to set it in
        /// non-blocking mode.
        ///
        /// # Note
        ///
        /// The Unix stream here will not have `connect` called on it, so it
        /// should already be connected via some other means (be it manually, or
        /// the standard library).
        pub fn from_std(stream: net::UnixStream) -> UnixStream {
            UnixStream {
                inner: IoSource::new(stream),
            }
        }

        /// Creates an unnamed pair of connected sockets.
        ///
        /// Returns two `UnixStream`s which are connected to each other.
        pub fn pair() -> io::Result<(UnixStream, UnixStream)> {
            sys::uds::stream::pair().map(|(stream1, stream2)| {
                (UnixStream::from_std(stream1), UnixStream::from_std(stream2))
            })
        }

        /// Returns the socket address of the local half of this connection.
        pub fn local_addr(&self) -> io::Result<sys::SocketAddr> {
            sys::uds::stream::local_addr(&self.inner)
        }

        /// Returns the socket address of the remote half of this connection.
        pub fn peer_addr(&self) -> io::Result<sys::SocketAddr> {
            sys::uds::stream::peer_addr(&self.inner)
        }

        /// Returns the value of the `SO_ERROR` option.
        pub fn take_error(&self) -> io::Result<Option<io::Error>> {
            self.inner.take_error()
        }

        /// Shuts down the read, write, or both halves of this connection.
        ///
        /// This function will cause all pending and future I/O calls on the
        /// specified portions to immediately return with an appropriate value
        /// (see the documentation of `Shutdown`).
        pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
            self.inner.shutdown(how)
        }
    }

    impl Read for UnixStream {
        fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
            self.inner.do_io(|inner| (&*inner).read(buf))
        }

        fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
            self.inner.do_io(|inner| (&*inner).read_vectored(bufs))
        }
    }

    impl<'a> Read for &'a UnixStream {
        fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
            self.inner.do_io(|inner| (&*inner).read(buf))
        }

        fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
            self.inner.do_io(|inner| (&*inner).read_vectored(bufs))
        }
    }

    impl Write for UnixStream {
        fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
            self.inner.do_io(|inner| (&*inner).write(buf))
        }

        fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
            self.inner.do_io(|inner| (&*inner).write_vectored(bufs))
        }

        fn flush(&mut self) -> io::Result<()> {
            self.inner.do_io(|inner| (&*inner).flush())
        }
    }

    impl<'a> Write for &'a UnixStream {
        fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
            self.inner.do_io(|inner| (&*inner).write(buf))
        }

        fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
            self.inner.do_io(|inner| (&*inner).write_vectored(bufs))
        }

        fn flush(&mut self) -> io::Result<()> {
            self.inner.do_io(|inner| (&*inner).flush())
        }
    }

    impl event::Source for UnixStream {
        fn register(
            &mut self,
            registry: &Registry,
            token: Token,
            interests: Interest,
        ) -> io::Result<()> {
            self.inner.register(registry, token, interests)
        }

        fn reregister(
            &mut self,
            registry: &Registry,
            token: Token,
            interests: Interest,
        ) -> io::Result<()> {
            self.inner.reregister(registry, token, interests)
        }

        fn deregister(&mut self, registry: &Registry) -> io::Result<()> {
            self.inner.deregister(registry)
        }
    }

    impl fmt::Debug for UnixStream {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            self.inner.fmt(f)
        }
    }

    impl IntoRawFd for UnixStream {
        fn into_raw_fd(self) -> RawFd {
            self.inner.into_inner().into_raw_fd()
        }
    }

    impl AsRawFd for UnixStream {
        fn as_raw_fd(&self) -> RawFd {
            self.inner.as_raw_fd()
        }
    }

    impl FromRawFd for UnixStream {
        /// Converts a `RawFd` to a `UnixStream`.
        ///
        /// # Notes
        ///
        /// The caller is responsible for ensuring that the socket is in
        /// non-blocking mode.
        unsafe fn from_raw_fd(fd: RawFd) -> UnixStream {
            UnixStream::from_std(FromRawFd::from_raw_fd(fd))
        }
    }