std: Add a net module for TCP/UDP
This commit is an implementation of [RFC 807][rfc] which adds a `std::net` module for basic neworking based on top of `std::io`. This module serves as a replacement for the `std::old_io::net` module and networking primitives in `old_io`. [rfc]: fillmein The major focus of this redesign is to cut back on the level of abstraction to the point that each of the networking types is just a bare socket. To this end functionality such as timeouts and cloning has been removed (although cloning can be done through `duplicate`, it may just yield an error). With this `net` module comes a new implementation of `SocketAddr` and `IpAddr`. This work is entirely based on #20785 and the only changes were to alter the in-memory representation to match the `libc`-expected variants and to move from public fields to accessors.
This commit is contained in:
Alex Crichton
792
src/libstd/net/tcp.rs
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792
src/libstd/net/tcp.rs
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@@ -0,0 +1,792 @@
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use prelude::v1::*;
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use io::prelude::*;
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use io;
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use net::{ToSocketAddrs, SocketAddr, Shutdown};
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use sys_common::net2 as net_imp;
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use sys_common::AsInner;
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/// A structure which represents a TCP stream between a local socket and a
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/// remote socket.
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///
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/// The socket will be closed when the value is dropped.
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///
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/// # Example
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///
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/// ```no_run
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/// use std::io::prelude::*;
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/// use std::net::TcpStream;
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///
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/// {
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/// let mut stream = TcpStream::connect("127.0.0.1:34254").unwrap();
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///
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/// // ignore the Result
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/// let _ = stream.write(&[1]);
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/// let _ = stream.read(&mut [0; 128]); // ignore here too
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/// } // the stream is closed here
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/// ```
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pub struct TcpStream(net_imp::TcpStream);
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/// A structure representing a socket server.
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///
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/// # Examples
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///
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/// ```no_run
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/// use std::net::{TcpListener, TcpStream};
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/// use std::thread::Thread;
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///
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/// let listener = TcpListener::bind("127.0.0.1:80").unwrap();
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///
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/// fn handle_client(stream: TcpStream) {
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/// // ...
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/// }
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///
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/// // accept connections and process them, spawning a new thread for each one
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/// for stream in listener.incoming() {
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/// match stream {
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/// Ok(stream) => {
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/// Thread::spawn(move|| {
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/// // connection succeeded
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/// handle_client(stream)
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/// });
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/// }
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/// Err(e) => { /* connection failed */ }
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/// }
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/// }
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///
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/// // close the socket server
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/// drop(listener);
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/// ```
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pub struct TcpListener(net_imp::TcpListener);
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/// An infinite iterator over the connections from a `TcpListener`.
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///
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/// This iterator will infinitely yield `Some` of the accepted connections. It
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/// is equivalent to calling `accept` in a loop.
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pub struct Incoming<'a> { listener: &'a TcpListener }
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impl TcpStream {
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/// Open a TCP connection to a remote host.
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///
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/// `addr` is an address of the remote host. Anything which implements
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/// `ToSocketAddrs` trait can be supplied for the address; see this trait
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/// documentation for concrete examples.
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pub fn connect<A: ToSocketAddrs + ?Sized>(addr: &A) -> io::Result<TcpStream> {
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super::each_addr(addr, net_imp::TcpStream::connect).map(TcpStream)
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}
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/// Returns the socket address of the remote peer of this TCP connection.
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pub fn peer_addr(&self) -> io::Result<SocketAddr> {
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self.0.peer_addr()
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}
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/// Returns the socket address of the local half of this TCP connection.
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pub fn socket_addr(&self) -> io::Result<SocketAddr> {
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self.0.socket_addr()
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}
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/// Shut down the read, write, or both halves of this connection.
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///
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/// This function will cause all pending and future I/O on the specified
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/// portions to return immediately with an appropriate value (see the
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/// documentation of `Shutdown`).
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pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
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self.0.shutdown(how)
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}
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/// Create a new independently owned handle to the underlying socket.
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///
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/// The returned `TcpStream` is a reference to the same stream that this
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/// object references. Both handles will read and write the same stream of
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/// data, and options set on one stream will be propagated to the other
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/// stream.
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pub fn try_clone(&self) -> io::Result<TcpStream> {
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self.0.duplicate().map(TcpStream)
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}
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/// Sets the nodelay flag on this connection to the boolean specified
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pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> {
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self.0.set_nodelay(nodelay)
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}
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/// Sets the keepalive timeout to the timeout specified.
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///
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/// If the value specified is `None`, then the keepalive flag is cleared on
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/// this connection. Otherwise, the keepalive timeout will be set to the
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/// specified time, in seconds.
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pub fn set_keepalive(&self, seconds: Option<u32>) -> io::Result<()> {
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self.0.set_keepalive(seconds)
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}
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}
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impl Read for TcpStream {
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fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { self.0.read(buf) }
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}
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impl Write for TcpStream {
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fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.0.write(buf) }
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fn flush(&mut self) -> io::Result<()> { Ok(()) }
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}
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impl<'a> Read for &'a TcpStream {
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fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { self.0.read(buf) }
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}
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impl<'a> Write for &'a TcpStream {
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fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.0.write(buf) }
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fn flush(&mut self) -> io::Result<()> { Ok(()) }
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}
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impl AsInner<net_imp::TcpStream> for TcpStream {
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fn as_inner(&self) -> &net_imp::TcpStream { &self.0 }
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}
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impl TcpListener {
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/// Creates a new `TcpListener` which will be bound to the specified
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/// address.
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///
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/// The returned listener is ready for accepting connections.
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///
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/// Binding with a port number of 0 will request that the OS assigns a port
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/// to this listener. The port allocated can be queried via the
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/// `socket_addr` function.
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///
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/// The address type can be any implementer of `ToSocketAddrs` trait. See
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/// its documentation for concrete examples.
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pub fn bind<A: ToSocketAddrs + ?Sized>(addr: &A) -> io::Result<TcpListener> {
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super::each_addr(addr, net_imp::TcpListener::bind).map(TcpListener)
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}
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/// Returns the local socket address of this listener.
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pub fn socket_addr(&self) -> io::Result<SocketAddr> {
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self.0.socket_addr()
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}
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/// Create a new independently owned handle to the underlying socket.
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///
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/// The returned `TcpListener` is a reference to the same socket that this
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/// object references. Both handles can be used to accept incoming
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/// connections and options set on one listener will affect the other.
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pub fn try_clone(&self) -> io::Result<TcpListener> {
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self.0.duplicate().map(TcpListener)
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}
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/// Accept a new incoming connection from this listener.
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///
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/// This function will block the calling thread until a new TCP connection
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/// is established. When established, the corresponding `TcpStream` and the
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/// remote peer's address will be returned.
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pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> {
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self.0.accept().map(|(a, b)| (TcpStream(a), b))
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}
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/// Returns an iterator over the connections being received on this
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/// listener.
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///
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/// The returned iterator will never returned `None` and will also not yield
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/// the peer's `SocketAddr` structure.
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pub fn incoming(&self) -> Incoming {
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Incoming { listener: self }
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}
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}
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impl<'a> Iterator for Incoming<'a> {
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type Item = io::Result<TcpStream>;
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fn next(&mut self) -> Option<io::Result<TcpStream>> {
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Some(self.listener.accept().map(|p| p.0))
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}
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}
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impl AsInner<net_imp::TcpListener> for TcpListener {
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fn as_inner(&self) -> &net_imp::TcpListener { &self.0 }
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}
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#[cfg(test)]
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mod tests {
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use prelude::v1::*;
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use io::ErrorKind;
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use io::prelude::*;
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use net::*;
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use net::test::{next_test_ip4, next_test_ip6};
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use sync::mpsc::channel;
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use thread::Thread;
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fn each_ip(f: &mut FnMut(SocketAddr)) {
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f(next_test_ip4());
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f(next_test_ip6());
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}
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macro_rules! t {
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($e:expr) => {
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match $e {
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Ok(t) => t,
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Err(e) => panic!("received error for `{}`: {}", stringify!($e), e),
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}
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}
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}
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// FIXME #11530 this fails on android because tests are run as root
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#[cfg_attr(any(windows, target_os = "android"), ignore)]
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#[test]
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fn bind_error() {
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match TcpListener::bind("0.0.0.0:1") {
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Ok(..) => panic!(),
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Err(e) => assert_eq!(e.kind(), ErrorKind::PermissionDenied),
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}
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}
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#[test]
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fn connect_error() {
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match TcpStream::connect("0.0.0.0:1") {
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Ok(..) => panic!(),
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Err(e) => assert_eq!(e.kind(), ErrorKind::ConnectionRefused),
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}
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}
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#[test]
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fn listen_localhost() {
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let socket_addr = next_test_ip4();
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let listener = t!(TcpListener::bind(&socket_addr));
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let _t = Thread::scoped(move || {
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let mut stream = t!(TcpStream::connect(&("localhost",
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socket_addr.port())));
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t!(stream.write(&[144]));
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});
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let mut stream = t!(listener.accept()).0;
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let mut buf = [0];
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t!(stream.read(&mut buf));
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assert!(buf[0] == 144);
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}
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#[test]
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fn connect_ip4_loopback() {
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let addr = next_test_ip4();
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let acceptor = t!(TcpListener::bind(&addr));
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let _t = Thread::scoped(move|| {
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let mut stream = t!(TcpStream::connect(&("127.0.0.1", addr.port())));
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t!(stream.write(&[44]));
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});
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let mut stream = t!(acceptor.accept()).0;
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let mut buf = [0];
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t!(stream.read(&mut buf));
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assert!(buf[0] == 44);
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}
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#[test]
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fn connect_ip6_loopback() {
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let addr = next_test_ip6();
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let acceptor = t!(TcpListener::bind(&addr));
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let _t = Thread::scoped(move|| {
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let mut stream = t!(TcpStream::connect(&("::1", addr.port())));
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t!(stream.write(&[66]));
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});
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let mut stream = t!(acceptor.accept()).0;
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let mut buf = [0];
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t!(stream.read(&mut buf));
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assert!(buf[0] == 66);
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}
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#[test]
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fn smoke_test_ip6() {
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each_ip(&mut |addr| {
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let acceptor = t!(TcpListener::bind(&addr));
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let (tx, rx) = channel();
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let _t = Thread::scoped(move|| {
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let mut stream = t!(TcpStream::connect(&addr));
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t!(stream.write(&[99]));
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tx.send(t!(stream.socket_addr())).unwrap();
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});
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let (mut stream, addr) = t!(acceptor.accept());
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let mut buf = [0];
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t!(stream.read(&mut buf));
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assert!(buf[0] == 99);
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assert_eq!(addr, t!(rx.recv()));
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})
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}
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#[test]
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fn read_eof_ip4() {
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each_ip(&mut |addr| {
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let acceptor = t!(TcpListener::bind(&addr));
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let _t = Thread::scoped(move|| {
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let _stream = t!(TcpStream::connect(&addr));
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// Close
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});
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let mut stream = t!(acceptor.accept()).0;
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let mut buf = [0];
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let nread = t!(stream.read(&mut buf));
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assert_eq!(nread, 0);
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let nread = t!(stream.read(&mut buf));
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assert_eq!(nread, 0);
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})
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}
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#[test]
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fn write_close() {
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each_ip(&mut |addr| {
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let acceptor = t!(TcpListener::bind(&addr));
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let (tx, rx) = channel();
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let _t = Thread::scoped(move|| {
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drop(t!(TcpStream::connect(&addr)));
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tx.send(()).unwrap();
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});
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let mut stream = t!(acceptor.accept()).0;
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rx.recv().unwrap();
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let buf = [0];
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match stream.write(&buf) {
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Ok(..) => {}
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Err(e) => {
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assert!(e.kind() == ErrorKind::ConnectionReset ||
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e.kind() == ErrorKind::BrokenPipe ||
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e.kind() == ErrorKind::ConnectionAborted,
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"unknown error: {}", e);
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}
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}
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})
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}
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#[test]
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fn multiple_connect_serial_ip4() {
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each_ip(&mut |addr| {
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let max = 10;
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let acceptor = t!(TcpListener::bind(&addr));
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let _t = Thread::scoped(move|| {
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for _ in 0..max {
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let mut stream = t!(TcpStream::connect(&addr));
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t!(stream.write(&[99]));
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}
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});
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for stream in acceptor.incoming().take(max) {
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let mut stream = t!(stream);
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let mut buf = [0];
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t!(stream.read(&mut buf));
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assert_eq!(buf[0], 99);
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}
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})
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}
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#[test]
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fn multiple_connect_interleaved_greedy_schedule() {
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static MAX: usize = 10;
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each_ip(&mut |addr| {
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let acceptor = t!(TcpListener::bind(&addr));
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let _t = Thread::scoped(move|| {
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let acceptor = acceptor;
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for (i, stream) in acceptor.incoming().enumerate().take(MAX) {
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// Start another task to handle the connection
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let _t = Thread::scoped(move|| {
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let mut stream = t!(stream);
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let mut buf = [0];
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t!(stream.read(&mut buf));
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assert!(buf[0] == i as u8);
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});
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}
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});
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connect(0, addr);
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});
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fn connect(i: usize, addr: SocketAddr) {
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if i == MAX { return }
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let t = Thread::scoped(move|| {
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let mut stream = t!(TcpStream::connect(&addr));
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// Connect again before writing
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connect(i + 1, addr);
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t!(stream.write(&[i as u8]));
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});
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t.join().ok().unwrap();
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}
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}
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#[test]
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fn multiple_connect_interleaved_lazy_schedule_ip4() {
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static MAX: usize = 10;
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each_ip(&mut |addr| {
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let acceptor = t!(TcpListener::bind(&addr));
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let _t = Thread::scoped(move|| {
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for stream in acceptor.incoming().take(MAX) {
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// Start another task to handle the connection
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let _t = Thread::scoped(move|| {
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let mut stream = t!(stream);
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let mut buf = [0];
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t!(stream.read(&mut buf));
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assert!(buf[0] == 99);
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});
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}
|
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});
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|
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connect(0, addr);
|
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});
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|
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fn connect(i: usize, addr: SocketAddr) {
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if i == MAX { return }
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||||
|
||||
let t = Thread::scoped(move|| {
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let mut stream = t!(TcpStream::connect(&addr));
|
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connect(i + 1, addr);
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t!(stream.write(&[99]));
|
||||
});
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t.join().ok().unwrap();
|
||||
}
|
||||
}
|
||||
|
||||
pub fn socket_name(addr: SocketAddr) {
|
||||
}
|
||||
|
||||
pub fn peer_name(addr: SocketAddr) {
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn socket_and_peer_name_ip4() {
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each_ip(&mut |addr| {
|
||||
let listener = t!(TcpListener::bind(&addr));
|
||||
let so_name = t!(listener.socket_addr());
|
||||
assert_eq!(addr, so_name);
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||||
let _t = Thread::scoped(move|| {
|
||||
t!(listener.accept());
|
||||
});
|
||||
|
||||
let stream = t!(TcpStream::connect(&addr));
|
||||
assert_eq!(addr, t!(stream.peer_addr()));
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn partial_read() {
|
||||
each_ip(&mut |addr| {
|
||||
let (tx, rx) = channel();
|
||||
let srv = t!(TcpListener::bind(&addr));
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut cl = t!(srv.accept()).0;
|
||||
cl.write(&[10]).unwrap();
|
||||
let mut b = [0];
|
||||
t!(cl.read(&mut b));
|
||||
tx.send(()).unwrap();
|
||||
});
|
||||
|
||||
let mut c = t!(TcpStream::connect(&addr));
|
||||
let mut b = [0; 10];
|
||||
assert_eq!(c.read(&mut b), Ok(1));
|
||||
t!(c.write(&[1]));
|
||||
rx.recv().unwrap();
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn double_bind() {
|
||||
each_ip(&mut |addr| {
|
||||
let _listener = t!(TcpListener::bind(&addr));
|
||||
match TcpListener::bind(&addr) {
|
||||
Ok(..) => panic!(),
|
||||
Err(e) => {
|
||||
assert!(e.kind() == ErrorKind::ConnectionRefused ||
|
||||
e.kind() == ErrorKind::Other,
|
||||
"unknown error: {} {:?}", e, e.kind());
|
||||
}
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn fast_rebind() {
|
||||
each_ip(&mut |addr| {
|
||||
let acceptor = t!(TcpListener::bind(&addr));
|
||||
|
||||
let _t = Thread::scoped(move|| {
|
||||
t!(TcpStream::connect(&addr));
|
||||
});
|
||||
|
||||
t!(acceptor.accept());
|
||||
drop(acceptor);
|
||||
t!(TcpListener::bind(&addr));
|
||||
});
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn tcp_clone_smoke() {
|
||||
each_ip(&mut |addr| {
|
||||
let acceptor = t!(TcpListener::bind(&addr));
|
||||
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut s = t!(TcpStream::connect(&addr));
|
||||
let mut buf = [0, 0];
|
||||
assert_eq!(s.read(&mut buf), Ok(1));
|
||||
assert_eq!(buf[0], 1);
|
||||
t!(s.write(&[2]));
|
||||
});
|
||||
|
||||
let mut s1 = t!(acceptor.accept()).0;
|
||||
let s2 = t!(s1.try_clone());
|
||||
|
||||
let (tx1, rx1) = channel();
|
||||
let (tx2, rx2) = channel();
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut s2 = s2;
|
||||
rx1.recv().unwrap();
|
||||
t!(s2.write(&[1]));
|
||||
tx2.send(()).unwrap();
|
||||
});
|
||||
tx1.send(()).unwrap();
|
||||
let mut buf = [0, 0];
|
||||
assert_eq!(s1.read(&mut buf), Ok(1));
|
||||
rx2.recv().unwrap();
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn tcp_clone_two_read() {
|
||||
each_ip(&mut |addr| {
|
||||
let acceptor = t!(TcpListener::bind(&addr));
|
||||
let (tx1, rx) = channel();
|
||||
let tx2 = tx1.clone();
|
||||
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut s = t!(TcpStream::connect(&addr));
|
||||
t!(s.write(&[1]));
|
||||
rx.recv().unwrap();
|
||||
t!(s.write(&[2]));
|
||||
rx.recv().unwrap();
|
||||
});
|
||||
|
||||
let mut s1 = t!(acceptor.accept()).0;
|
||||
let s2 = t!(s1.try_clone());
|
||||
|
||||
let (done, rx) = channel();
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut s2 = s2;
|
||||
let mut buf = [0, 0];
|
||||
t!(s2.read(&mut buf));
|
||||
tx2.send(()).unwrap();
|
||||
done.send(()).unwrap();
|
||||
});
|
||||
let mut buf = [0, 0];
|
||||
t!(s1.read(&mut buf));
|
||||
tx1.send(()).unwrap();
|
||||
|
||||
rx.recv().unwrap();
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn tcp_clone_two_write() {
|
||||
each_ip(&mut |addr| {
|
||||
let acceptor = t!(TcpListener::bind(&addr));
|
||||
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut s = t!(TcpStream::connect(&addr));
|
||||
let mut buf = [0, 1];
|
||||
t!(s.read(&mut buf));
|
||||
t!(s.read(&mut buf));
|
||||
});
|
||||
|
||||
let mut s1 = t!(acceptor.accept()).0;
|
||||
let s2 = t!(s1.try_clone());
|
||||
|
||||
let (done, rx) = channel();
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut s2 = s2;
|
||||
t!(s2.write(&[1]));
|
||||
done.send(()).unwrap();
|
||||
});
|
||||
t!(s1.write(&[2]));
|
||||
|
||||
rx.recv().unwrap();
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn shutdown_smoke() {
|
||||
each_ip(&mut |addr| {
|
||||
let a = t!(TcpListener::bind(&addr));
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut c = t!(a.accept()).0;
|
||||
let mut b = [0];
|
||||
assert_eq!(c.read(&mut b), Ok(0));
|
||||
t!(c.write(&[1]));
|
||||
});
|
||||
|
||||
let mut s = t!(TcpStream::connect(&addr));
|
||||
t!(s.shutdown(Shutdown::Write));
|
||||
assert!(s.write(&[1]).is_err());
|
||||
let mut b = [0, 0];
|
||||
assert_eq!(t!(s.read(&mut b)), 1);
|
||||
assert_eq!(b[0], 1);
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn close_readwrite_smoke() {
|
||||
each_ip(&mut |addr| {
|
||||
let a = t!(TcpListener::bind(&addr));
|
||||
let (tx, rx) = channel::<()>();
|
||||
let _t = Thread::scoped(move|| {
|
||||
let _s = t!(a.accept());
|
||||
let _ = rx.recv();
|
||||
});
|
||||
|
||||
let mut b = [0];
|
||||
let mut s = t!(TcpStream::connect(&addr));
|
||||
let mut s2 = t!(s.try_clone());
|
||||
|
||||
// closing should prevent reads/writes
|
||||
t!(s.shutdown(Shutdown::Write));
|
||||
assert!(s.write(&[0]).is_err());
|
||||
t!(s.shutdown(Shutdown::Read));
|
||||
assert_eq!(s.read(&mut b), Ok(0));
|
||||
|
||||
// closing should affect previous handles
|
||||
assert!(s2.write(&[0]).is_err());
|
||||
assert_eq!(s2.read(&mut b), Ok(0));
|
||||
|
||||
// closing should affect new handles
|
||||
let mut s3 = t!(s.try_clone());
|
||||
assert!(s3.write(&[0]).is_err());
|
||||
assert_eq!(s3.read(&mut b), Ok(0));
|
||||
|
||||
// make sure these don't die
|
||||
let _ = s2.shutdown(Shutdown::Read);
|
||||
let _ = s2.shutdown(Shutdown::Write);
|
||||
let _ = s3.shutdown(Shutdown::Read);
|
||||
let _ = s3.shutdown(Shutdown::Write);
|
||||
drop(tx);
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn close_read_wakes_up() {
|
||||
each_ip(&mut |addr| {
|
||||
let a = t!(TcpListener::bind(&addr));
|
||||
let (tx1, rx) = channel::<()>();
|
||||
let _t = Thread::scoped(move|| {
|
||||
let _s = t!(a.accept());
|
||||
let _ = rx.recv();
|
||||
});
|
||||
|
||||
let s = t!(TcpStream::connect(&addr));
|
||||
let s2 = t!(s.try_clone());
|
||||
let (tx, rx) = channel();
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut s2 = s2;
|
||||
assert_eq!(t!(s2.read(&mut [0])), 0);
|
||||
tx.send(()).unwrap();
|
||||
});
|
||||
// this should wake up the child task
|
||||
t!(s.shutdown(Shutdown::Read));
|
||||
|
||||
// this test will never finish if the child doesn't wake up
|
||||
rx.recv().unwrap();
|
||||
drop(tx1);
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn clone_while_reading() {
|
||||
each_ip(&mut |addr| {
|
||||
let accept = t!(TcpListener::bind(&addr));
|
||||
|
||||
// Enqueue a task to write to a socket
|
||||
let (tx, rx) = channel();
|
||||
let (txdone, rxdone) = channel();
|
||||
let txdone2 = txdone.clone();
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut tcp = t!(TcpStream::connect(&addr));
|
||||
rx.recv().unwrap();
|
||||
t!(tcp.write(&[0]));
|
||||
txdone2.send(()).unwrap();
|
||||
});
|
||||
|
||||
// Spawn off a reading clone
|
||||
let tcp = t!(accept.accept()).0;
|
||||
let tcp2 = t!(tcp.try_clone());
|
||||
let txdone3 = txdone.clone();
|
||||
let _t = Thread::scoped(move|| {
|
||||
let mut tcp2 = tcp2;
|
||||
t!(tcp2.read(&mut [0]));
|
||||
txdone3.send(()).unwrap();
|
||||
});
|
||||
|
||||
// Try to ensure that the reading clone is indeed reading
|
||||
for _ in 0..50 {
|
||||
Thread::yield_now();
|
||||
}
|
||||
|
||||
// clone the handle again while it's reading, then let it finish the
|
||||
// read.
|
||||
let _ = t!(tcp.try_clone());
|
||||
tx.send(()).unwrap();
|
||||
rxdone.recv().unwrap();
|
||||
rxdone.recv().unwrap();
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn clone_accept_smoke() {
|
||||
each_ip(&mut |addr| {
|
||||
let a = t!(TcpListener::bind(&addr));
|
||||
let a2 = t!(a.try_clone());
|
||||
|
||||
let _t = Thread::scoped(move|| {
|
||||
let _ = TcpStream::connect(&addr);
|
||||
});
|
||||
let _t = Thread::scoped(move|| {
|
||||
let _ = TcpStream::connect(&addr);
|
||||
});
|
||||
|
||||
t!(a.accept());
|
||||
t!(a2.accept());
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn clone_accept_concurrent() {
|
||||
each_ip(&mut |addr| {
|
||||
let a = t!(TcpListener::bind(&addr));
|
||||
let a2 = t!(a.try_clone());
|
||||
|
||||
let (tx, rx) = channel();
|
||||
let tx2 = tx.clone();
|
||||
|
||||
let _t = Thread::scoped(move|| {
|
||||
tx.send(t!(a.accept())).unwrap();
|
||||
});
|
||||
let _t = Thread::scoped(move|| {
|
||||
tx2.send(t!(a2.accept())).unwrap();
|
||||
});
|
||||
|
||||
let _t = Thread::scoped(move|| {
|
||||
let _ = TcpStream::connect(&addr);
|
||||
});
|
||||
let _t = Thread::scoped(move|| {
|
||||
let _ = TcpStream::connect(&addr);
|
||||
});
|
||||
|
||||
rx.recv().unwrap();
|
||||
rx.recv().unwrap();
|
||||
})
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user