2096 lines
54 KiB
Rust
2096 lines
54 KiB
Rust
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//! Tests copied from `std::sync::mpsc`.
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//!
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//! This is a copy of tests for the `std::sync::mpsc` channels from the standard library, but
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//! modified to work with `crossbeam-channel` instead.
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//!
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//! Minor tweaks were needed to make the tests compile:
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//!
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//! - Replace `box` syntax with `Box::new`.
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//! - Replace all uses of `Select` with `select!`.
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//! - Change the imports.
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//! - Join all spawned threads.
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//! - Removed assertion from oneshot_multi_thread_send_close_stress tests.
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//!
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//! Source:
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//! - https://github.com/rust-lang/rust/tree/master/src/libstd/sync/mpsc
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//!
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//! Copyright & License:
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//! - Copyright 2013-2014 The Rust Project Developers
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//! - Apache License, Version 2.0 or MIT license, at your option
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//! - https://github.com/rust-lang/rust/blob/master/COPYRIGHT
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//! - https://www.rust-lang.org/en-US/legal.html
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#[macro_use]
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extern crate crossbeam_channel as cc;
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use std::sync::mpsc::{RecvError, RecvTimeoutError, TryRecvError};
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use std::sync::mpsc::{SendError, TrySendError};
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use std::thread::JoinHandle;
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use std::time::Duration;
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pub struct Sender<T> {
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pub inner: cc::Sender<T>,
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}
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impl<T> Sender<T> {
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pub fn send(&self, t: T) -> Result<(), SendError<T>> {
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self.inner.send(t).map_err(|cc::SendError(m)| SendError(m))
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}
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}
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impl<T> Clone for Sender<T> {
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fn clone(&self) -> Sender<T> {
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Sender {
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inner: self.inner.clone(),
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}
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}
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}
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pub struct SyncSender<T> {
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pub inner: cc::Sender<T>,
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}
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impl<T> SyncSender<T> {
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pub fn send(&self, t: T) -> Result<(), SendError<T>> {
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self.inner.send(t).map_err(|cc::SendError(m)| SendError(m))
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}
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pub fn try_send(&self, t: T) -> Result<(), TrySendError<T>> {
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self.inner.try_send(t).map_err(|err| match err {
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cc::TrySendError::Full(m) => TrySendError::Full(m),
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cc::TrySendError::Disconnected(m) => TrySendError::Disconnected(m),
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})
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}
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}
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impl<T> Clone for SyncSender<T> {
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fn clone(&self) -> SyncSender<T> {
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SyncSender {
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inner: self.inner.clone(),
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}
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}
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}
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pub struct Receiver<T> {
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pub inner: cc::Receiver<T>,
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}
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impl<T> Receiver<T> {
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pub fn try_recv(&self) -> Result<T, TryRecvError> {
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self.inner.try_recv().map_err(|err| match err {
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cc::TryRecvError::Empty => TryRecvError::Empty,
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cc::TryRecvError::Disconnected => TryRecvError::Disconnected,
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})
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}
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pub fn recv(&self) -> Result<T, RecvError> {
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self.inner.recv().map_err(|_| RecvError)
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}
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pub fn recv_timeout(&self, timeout: Duration) -> Result<T, RecvTimeoutError> {
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self.inner.recv_timeout(timeout).map_err(|err| match err {
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cc::RecvTimeoutError::Timeout => RecvTimeoutError::Timeout,
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cc::RecvTimeoutError::Disconnected => RecvTimeoutError::Disconnected,
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})
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}
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pub fn iter(&self) -> Iter<T> {
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Iter { inner: self }
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}
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pub fn try_iter(&self) -> TryIter<T> {
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TryIter { inner: self }
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}
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}
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impl<'a, T> IntoIterator for &'a Receiver<T> {
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type Item = T;
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type IntoIter = Iter<'a, T>;
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fn into_iter(self) -> Iter<'a, T> {
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self.iter()
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}
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}
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impl<T> IntoIterator for Receiver<T> {
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type Item = T;
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type IntoIter = IntoIter<T>;
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fn into_iter(self) -> IntoIter<T> {
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IntoIter { inner: self }
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}
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}
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pub struct TryIter<'a, T: 'a> {
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inner: &'a Receiver<T>,
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}
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impl<'a, T> Iterator for TryIter<'a, T> {
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type Item = T;
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fn next(&mut self) -> Option<T> {
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self.inner.try_recv().ok()
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}
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}
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pub struct Iter<'a, T: 'a> {
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inner: &'a Receiver<T>,
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}
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impl<'a, T> Iterator for Iter<'a, T> {
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type Item = T;
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fn next(&mut self) -> Option<T> {
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self.inner.recv().ok()
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}
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}
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pub struct IntoIter<T> {
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inner: Receiver<T>,
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}
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impl<T> Iterator for IntoIter<T> {
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type Item = T;
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fn next(&mut self) -> Option<T> {
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self.inner.recv().ok()
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}
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}
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pub fn channel<T>() -> (Sender<T>, Receiver<T>) {
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let (s, r) = cc::unbounded();
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let s = Sender { inner: s };
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let r = Receiver { inner: r };
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(s, r)
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}
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pub fn sync_channel<T>(bound: usize) -> (SyncSender<T>, Receiver<T>) {
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let (s, r) = cc::bounded(bound);
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let s = SyncSender { inner: s };
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let r = Receiver { inner: r };
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(s, r)
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}
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macro_rules! select {
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(
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$($name:pat = $rx:ident.$meth:ident() => $code:expr),+
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) => ({
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crossbeam_channel_internal! {
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$(
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recv(($rx).inner) -> res => {
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let $name = res.map_err(|_| ::std::sync::mpsc::RecvError);
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$code
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}
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)+
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}
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})
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}
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// Source: https://github.com/rust-lang/rust/blob/master/src/libstd/sync/mpsc/mod.rs
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mod channel_tests {
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use super::*;
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use std::env;
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use std::thread;
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use std::time::{Duration, Instant};
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pub fn stress_factor() -> usize {
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match env::var("RUST_TEST_STRESS") {
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Ok(val) => val.parse().unwrap(),
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Err(..) => 1,
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}
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}
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#[test]
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fn smoke() {
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let (tx, rx) = channel::<i32>();
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tx.send(1).unwrap();
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assert_eq!(rx.recv().unwrap(), 1);
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}
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#[test]
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fn drop_full() {
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let (tx, _rx) = channel::<Box<isize>>();
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tx.send(Box::new(1)).unwrap();
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}
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#[test]
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fn drop_full_shared() {
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let (tx, _rx) = channel::<Box<isize>>();
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drop(tx.clone());
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drop(tx.clone());
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tx.send(Box::new(1)).unwrap();
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}
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#[test]
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fn smoke_shared() {
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let (tx, rx) = channel::<i32>();
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tx.send(1).unwrap();
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assert_eq!(rx.recv().unwrap(), 1);
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let tx = tx.clone();
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tx.send(1).unwrap();
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assert_eq!(rx.recv().unwrap(), 1);
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}
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#[test]
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fn smoke_threads() {
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let (tx, rx) = channel::<i32>();
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let t = thread::spawn(move || {
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tx.send(1).unwrap();
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});
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assert_eq!(rx.recv().unwrap(), 1);
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t.join().unwrap();
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}
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#[test]
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fn smoke_port_gone() {
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let (tx, rx) = channel::<i32>();
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drop(rx);
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assert!(tx.send(1).is_err());
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}
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#[test]
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fn smoke_shared_port_gone() {
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let (tx, rx) = channel::<i32>();
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drop(rx);
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assert!(tx.send(1).is_err())
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}
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#[test]
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fn smoke_shared_port_gone2() {
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let (tx, rx) = channel::<i32>();
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drop(rx);
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let tx2 = tx.clone();
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drop(tx);
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assert!(tx2.send(1).is_err());
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}
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#[test]
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fn port_gone_concurrent() {
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let (tx, rx) = channel::<i32>();
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let t = thread::spawn(move || {
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rx.recv().unwrap();
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});
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while tx.send(1).is_ok() {}
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t.join().unwrap();
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}
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#[test]
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fn port_gone_concurrent_shared() {
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let (tx, rx) = channel::<i32>();
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let tx2 = tx.clone();
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let t = thread::spawn(move || {
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rx.recv().unwrap();
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});
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while tx.send(1).is_ok() && tx2.send(1).is_ok() {}
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t.join().unwrap();
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}
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#[test]
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fn smoke_chan_gone() {
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let (tx, rx) = channel::<i32>();
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drop(tx);
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assert!(rx.recv().is_err());
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}
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#[test]
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fn smoke_chan_gone_shared() {
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let (tx, rx) = channel::<()>();
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let tx2 = tx.clone();
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drop(tx);
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drop(tx2);
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assert!(rx.recv().is_err());
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}
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#[test]
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fn chan_gone_concurrent() {
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let (tx, rx) = channel::<i32>();
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let t = thread::spawn(move || {
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tx.send(1).unwrap();
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tx.send(1).unwrap();
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});
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while rx.recv().is_ok() {}
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t.join().unwrap();
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}
|
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#[test]
|
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|
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fn stress() {
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let (tx, rx) = channel::<i32>();
|
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let t = thread::spawn(move || {
|
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|
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for _ in 0..10000 {
|
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tx.send(1).unwrap();
|
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}
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});
|
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for _ in 0..10000 {
|
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assert_eq!(rx.recv().unwrap(), 1);
|
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}
|
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t.join().ok().unwrap();
|
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}
|
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|
|
|
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|
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#[test]
|
||
|
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fn stress_shared() {
|
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|
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const AMT: u32 = 10000;
|
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|
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const NTHREADS: u32 = 8;
|
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|
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let (tx, rx) = channel::<i32>();
|
||
|
|
|
||
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let t = thread::spawn(move || {
|
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|
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for _ in 0..AMT * NTHREADS {
|
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|
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assert_eq!(rx.recv().unwrap(), 1);
|
||
|
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}
|
||
|
|
match rx.try_recv() {
|
||
|
|
Ok(..) => panic!(),
|
||
|
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_ => {}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
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let mut ts = Vec::with_capacity(NTHREADS as usize);
|
||
|
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for _ in 0..NTHREADS {
|
||
|
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let tx = tx.clone();
|
||
|
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let t = thread::spawn(move || {
|
||
|
|
for _ in 0..AMT {
|
||
|
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tx.send(1).unwrap();
|
||
|
|
}
|
||
|
|
});
|
||
|
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ts.push(t);
|
||
|
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}
|
||
|
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drop(tx);
|
||
|
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t.join().ok().unwrap();
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn send_from_outside_runtime() {
|
||
|
|
let (tx1, rx1) = channel::<()>();
|
||
|
|
let (tx2, rx2) = channel::<i32>();
|
||
|
|
let t1 = thread::spawn(move || {
|
||
|
|
tx1.send(()).unwrap();
|
||
|
|
for _ in 0..40 {
|
||
|
|
assert_eq!(rx2.recv().unwrap(), 1);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
rx1.recv().unwrap();
|
||
|
|
let t2 = thread::spawn(move || {
|
||
|
|
for _ in 0..40 {
|
||
|
|
tx2.send(1).unwrap();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
t1.join().ok().unwrap();
|
||
|
|
t2.join().ok().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn recv_from_outside_runtime() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for _ in 0..40 {
|
||
|
|
assert_eq!(rx.recv().unwrap(), 1);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
for _ in 0..40 {
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
}
|
||
|
|
t.join().ok().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn no_runtime() {
|
||
|
|
let (tx1, rx1) = channel::<i32>();
|
||
|
|
let (tx2, rx2) = channel::<i32>();
|
||
|
|
let t1 = thread::spawn(move || {
|
||
|
|
assert_eq!(rx1.recv().unwrap(), 1);
|
||
|
|
tx2.send(2).unwrap();
|
||
|
|
});
|
||
|
|
let t2 = thread::spawn(move || {
|
||
|
|
tx1.send(1).unwrap();
|
||
|
|
assert_eq!(rx2.recv().unwrap(), 2);
|
||
|
|
});
|
||
|
|
t1.join().ok().unwrap();
|
||
|
|
t2.join().ok().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_close_port_first() {
|
||
|
|
// Simple test of closing without sending
|
||
|
|
let (_tx, rx) = channel::<i32>();
|
||
|
|
drop(rx);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_close_chan_first() {
|
||
|
|
// Simple test of closing without sending
|
||
|
|
let (tx, _rx) = channel::<i32>();
|
||
|
|
drop(tx);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_send_port_close() {
|
||
|
|
// Testing that the sender cleans up the payload if receiver is closed
|
||
|
|
let (tx, rx) = channel::<Box<i32>>();
|
||
|
|
drop(rx);
|
||
|
|
assert!(tx.send(Box::new(0)).is_err());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_recv_chan_close() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
drop(tx);
|
||
|
|
assert_eq!(rx.recv(), Err(RecvError));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_send_then_recv() {
|
||
|
|
let (tx, rx) = channel::<Box<i32>>();
|
||
|
|
tx.send(Box::new(10)).unwrap();
|
||
|
|
assert!(*rx.recv().unwrap() == 10);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_try_send_open() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
assert!(tx.send(10).is_ok());
|
||
|
|
assert!(rx.recv().unwrap() == 10);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_try_send_closed() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
drop(rx);
|
||
|
|
assert!(tx.send(10).is_err());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_try_recv_open() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
tx.send(10).unwrap();
|
||
|
|
assert!(rx.recv() == Ok(10));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_try_recv_closed() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
drop(tx);
|
||
|
|
assert!(rx.recv().is_err());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_peek_data() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
assert_eq!(rx.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
tx.send(10).unwrap();
|
||
|
|
assert_eq!(rx.try_recv(), Ok(10));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_peek_close() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
drop(tx);
|
||
|
|
assert_eq!(rx.try_recv(), Err(TryRecvError::Disconnected));
|
||
|
|
assert_eq!(rx.try_recv(), Err(TryRecvError::Disconnected));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_peek_open() {
|
||
|
|
let (_tx, rx) = channel::<i32>();
|
||
|
|
assert_eq!(rx.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_task_recv_then_send() {
|
||
|
|
let (tx, rx) = channel::<Box<i32>>();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
assert!(*rx.recv().unwrap() == 10);
|
||
|
|
});
|
||
|
|
|
||
|
|
tx.send(Box::new(10)).unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_task_recv_then_close() {
|
||
|
|
let (tx, rx) = channel::<Box<i32>>();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
drop(tx);
|
||
|
|
});
|
||
|
|
thread::spawn(move || {
|
||
|
|
assert_eq!(rx.recv(), Err(RecvError));
|
||
|
|
})
|
||
|
|
.join()
|
||
|
|
.unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_thread_close_stress() {
|
||
|
|
let stress_factor = stress_factor();
|
||
|
|
let mut ts = Vec::with_capacity(stress_factor);
|
||
|
|
for _ in 0..stress_factor {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
drop(rx);
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
drop(tx);
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_thread_send_close_stress() {
|
||
|
|
let stress_factor = stress_factor();
|
||
|
|
let mut ts = Vec::with_capacity(2 * stress_factor);
|
||
|
|
for _ in 0..stress_factor {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
drop(rx);
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
thread::spawn(move || {
|
||
|
|
let _ = tx.send(1);
|
||
|
|
})
|
||
|
|
.join()
|
||
|
|
.unwrap();
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_thread_recv_close_stress() {
|
||
|
|
let stress_factor = stress_factor();
|
||
|
|
let mut ts = Vec::with_capacity(2 * stress_factor);
|
||
|
|
for _ in 0..stress_factor {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
thread::spawn(move || {
|
||
|
|
assert_eq!(rx.recv(), Err(RecvError));
|
||
|
|
})
|
||
|
|
.join()
|
||
|
|
.unwrap();
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
let t2 = thread::spawn(move || {
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
drop(tx);
|
||
|
|
});
|
||
|
|
t.join().unwrap();
|
||
|
|
});
|
||
|
|
ts.push(t2);
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_thread_send_recv_stress() {
|
||
|
|
let stress_factor = stress_factor();
|
||
|
|
let mut ts = Vec::with_capacity(stress_factor);
|
||
|
|
for _ in 0..stress_factor {
|
||
|
|
let (tx, rx) = channel::<Box<isize>>();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
tx.send(Box::new(10)).unwrap();
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
assert!(*rx.recv().unwrap() == 10);
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn stream_send_recv_stress() {
|
||
|
|
let stress_factor = stress_factor();
|
||
|
|
let mut ts = Vec::with_capacity(2 * stress_factor);
|
||
|
|
for _ in 0..stress_factor {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
|
||
|
|
if let Some(t) = send(tx, 0) {
|
||
|
|
ts.push(t);
|
||
|
|
}
|
||
|
|
if let Some(t2) = recv(rx, 0) {
|
||
|
|
ts.push(t2);
|
||
|
|
}
|
||
|
|
|
||
|
|
fn send(tx: Sender<Box<i32>>, i: i32) -> Option<JoinHandle<()>> {
|
||
|
|
if i == 10 {
|
||
|
|
return None;
|
||
|
|
}
|
||
|
|
|
||
|
|
Some(thread::spawn(move || {
|
||
|
|
tx.send(Box::new(i)).unwrap();
|
||
|
|
send(tx, i + 1);
|
||
|
|
}))
|
||
|
|
}
|
||
|
|
|
||
|
|
fn recv(rx: Receiver<Box<i32>>, i: i32) -> Option<JoinHandle<()>> {
|
||
|
|
if i == 10 {
|
||
|
|
return None;
|
||
|
|
}
|
||
|
|
|
||
|
|
Some(thread::spawn(move || {
|
||
|
|
assert!(*rx.recv().unwrap() == i);
|
||
|
|
recv(rx, i + 1);
|
||
|
|
}))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_recv_timeout() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
assert_eq!(rx.recv_timeout(Duration::from_millis(1)), Ok(()));
|
||
|
|
assert_eq!(
|
||
|
|
rx.recv_timeout(Duration::from_millis(1)),
|
||
|
|
Err(RecvTimeoutError::Timeout)
|
||
|
|
);
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
assert_eq!(rx.recv_timeout(Duration::from_millis(1)), Ok(()));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn stress_recv_timeout_two_threads() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
let stress = stress_factor() + 100;
|
||
|
|
let timeout = Duration::from_millis(100);
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for i in 0..stress {
|
||
|
|
if i % 2 == 0 {
|
||
|
|
thread::sleep(timeout * 2);
|
||
|
|
}
|
||
|
|
tx.send(1usize).unwrap();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
let mut recv_count = 0;
|
||
|
|
loop {
|
||
|
|
match rx.recv_timeout(timeout) {
|
||
|
|
Ok(n) => {
|
||
|
|
assert_eq!(n, 1usize);
|
||
|
|
recv_count += 1;
|
||
|
|
}
|
||
|
|
Err(RecvTimeoutError::Timeout) => continue,
|
||
|
|
Err(RecvTimeoutError::Disconnected) => break,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
assert_eq!(recv_count, stress);
|
||
|
|
t.join().unwrap()
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn recv_timeout_upgrade() {
|
||
|
|
let (tx, rx) = channel::<()>();
|
||
|
|
let timeout = Duration::from_millis(1);
|
||
|
|
let _tx_clone = tx.clone();
|
||
|
|
|
||
|
|
let start = Instant::now();
|
||
|
|
assert_eq!(rx.recv_timeout(timeout), Err(RecvTimeoutError::Timeout));
|
||
|
|
assert!(Instant::now() >= start + timeout);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn stress_recv_timeout_shared() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
let stress = stress_factor() + 100;
|
||
|
|
|
||
|
|
let mut ts = Vec::with_capacity(stress);
|
||
|
|
for i in 0..stress {
|
||
|
|
let tx = tx.clone();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
thread::sleep(Duration::from_millis(i as u64 * 10));
|
||
|
|
tx.send(1usize).unwrap();
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
}
|
||
|
|
|
||
|
|
drop(tx);
|
||
|
|
|
||
|
|
let mut recv_count = 0;
|
||
|
|
loop {
|
||
|
|
match rx.recv_timeout(Duration::from_millis(10)) {
|
||
|
|
Ok(n) => {
|
||
|
|
assert_eq!(n, 1usize);
|
||
|
|
recv_count += 1;
|
||
|
|
}
|
||
|
|
Err(RecvTimeoutError::Timeout) => continue,
|
||
|
|
Err(RecvTimeoutError::Disconnected) => break,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
assert_eq!(recv_count, stress);
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn recv_a_lot() {
|
||
|
|
// Regression test that we don't run out of stack in scheduler context
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
for _ in 0..10000 {
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
}
|
||
|
|
for _ in 0..10000 {
|
||
|
|
rx.recv().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn shared_recv_timeout() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
let total = 5;
|
||
|
|
let mut ts = Vec::with_capacity(total);
|
||
|
|
for _ in 0..total {
|
||
|
|
let tx = tx.clone();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
}
|
||
|
|
|
||
|
|
for _ in 0..total {
|
||
|
|
rx.recv().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
assert_eq!(
|
||
|
|
rx.recv_timeout(Duration::from_millis(1)),
|
||
|
|
Err(RecvTimeoutError::Timeout)
|
||
|
|
);
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
assert_eq!(rx.recv_timeout(Duration::from_millis(1)), Ok(()));
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn shared_chan_stress() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
let total = stress_factor() + 100;
|
||
|
|
let mut ts = Vec::with_capacity(total);
|
||
|
|
for _ in 0..total {
|
||
|
|
let tx = tx.clone();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
}
|
||
|
|
|
||
|
|
for _ in 0..total {
|
||
|
|
rx.recv().unwrap();
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_nested_recv_iter() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
let (total_tx, total_rx) = channel::<i32>();
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
let mut acc = 0;
|
||
|
|
for x in rx.iter() {
|
||
|
|
acc += x;
|
||
|
|
}
|
||
|
|
total_tx.send(acc).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
tx.send(3).unwrap();
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
tx.send(2).unwrap();
|
||
|
|
drop(tx);
|
||
|
|
assert_eq!(total_rx.recv().unwrap(), 6);
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_recv_iter_break() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
let (count_tx, count_rx) = channel();
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
let mut count = 0;
|
||
|
|
for x in rx.iter() {
|
||
|
|
if count >= 3 {
|
||
|
|
break;
|
||
|
|
} else {
|
||
|
|
count += x;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
count_tx.send(count).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
tx.send(2).unwrap();
|
||
|
|
tx.send(2).unwrap();
|
||
|
|
tx.send(2).unwrap();
|
||
|
|
let _ = tx.send(2);
|
||
|
|
drop(tx);
|
||
|
|
assert_eq!(count_rx.recv().unwrap(), 4);
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_recv_try_iter() {
|
||
|
|
let (request_tx, request_rx) = channel();
|
||
|
|
let (response_tx, response_rx) = channel();
|
||
|
|
|
||
|
|
// Request `x`s until we have `6`.
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
let mut count = 0;
|
||
|
|
loop {
|
||
|
|
for x in response_rx.try_iter() {
|
||
|
|
count += x;
|
||
|
|
if count == 6 {
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
request_tx.send(()).unwrap();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
for _ in request_rx.iter() {
|
||
|
|
if response_tx.send(2).is_err() {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
assert_eq!(t.join().unwrap(), 6);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_recv_into_iter_owned() {
|
||
|
|
let mut iter = {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
tx.send(2).unwrap();
|
||
|
|
|
||
|
|
rx.into_iter()
|
||
|
|
};
|
||
|
|
assert_eq!(iter.next().unwrap(), 1);
|
||
|
|
assert_eq!(iter.next().unwrap(), 2);
|
||
|
|
assert_eq!(iter.next().is_none(), true);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_recv_into_iter_borrowed() {
|
||
|
|
let (tx, rx) = channel::<i32>();
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
tx.send(2).unwrap();
|
||
|
|
drop(tx);
|
||
|
|
let mut iter = (&rx).into_iter();
|
||
|
|
assert_eq!(iter.next().unwrap(), 1);
|
||
|
|
assert_eq!(iter.next().unwrap(), 2);
|
||
|
|
assert_eq!(iter.next().is_none(), true);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn try_recv_states() {
|
||
|
|
let (tx1, rx1) = channel::<i32>();
|
||
|
|
let (tx2, rx2) = channel::<()>();
|
||
|
|
let (tx3, rx3) = channel::<()>();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
rx2.recv().unwrap();
|
||
|
|
tx1.send(1).unwrap();
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
rx2.recv().unwrap();
|
||
|
|
drop(tx1);
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
assert_eq!(rx1.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
assert_eq!(rx1.try_recv(), Ok(1));
|
||
|
|
assert_eq!(rx1.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
assert_eq!(rx1.try_recv(), Err(TryRecvError::Disconnected));
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
// This bug used to end up in a livelock inside of the Receiver destructor
|
||
|
|
// because the internal state of the Shared packet was corrupted
|
||
|
|
#[test]
|
||
|
|
fn destroy_upgraded_shared_port_when_sender_still_active() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
let (tx2, rx2) = channel();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
rx.recv().unwrap(); // wait on a oneshot
|
||
|
|
drop(rx); // destroy a shared
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
});
|
||
|
|
// make sure the other thread has gone to sleep
|
||
|
|
for _ in 0..5000 {
|
||
|
|
thread::yield_now();
|
||
|
|
}
|
||
|
|
|
||
|
|
// upgrade to a shared chan and send a message
|
||
|
|
let tx2 = tx.clone();
|
||
|
|
drop(tx);
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
|
||
|
|
// wait for the child thread to exit before we exit
|
||
|
|
rx2.recv().unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn issue_32114() {
|
||
|
|
let (tx, _) = channel();
|
||
|
|
let _ = tx.send(123);
|
||
|
|
assert_eq!(tx.send(123), Err(SendError(123)));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Source: https://github.com/rust-lang/rust/blob/master/src/libstd/sync/mpsc/mod.rs
|
||
|
|
mod sync_channel_tests {
|
||
|
|
use super::*;
|
||
|
|
|
||
|
|
use std::env;
|
||
|
|
use std::thread;
|
||
|
|
use std::time::Duration;
|
||
|
|
|
||
|
|
pub fn stress_factor() -> usize {
|
||
|
|
match env::var("RUST_TEST_STRESS") {
|
||
|
|
Ok(val) => val.parse().unwrap(),
|
||
|
|
Err(..) => 1,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn smoke() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(1);
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
assert_eq!(rx.recv().unwrap(), 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn drop_full() {
|
||
|
|
let (tx, _rx) = sync_channel::<Box<isize>>(1);
|
||
|
|
tx.send(Box::new(1)).unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn smoke_shared() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(1);
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
assert_eq!(rx.recv().unwrap(), 1);
|
||
|
|
let tx = tx.clone();
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
assert_eq!(rx.recv().unwrap(), 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn recv_timeout() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(1);
|
||
|
|
assert_eq!(
|
||
|
|
rx.recv_timeout(Duration::from_millis(1)),
|
||
|
|
Err(RecvTimeoutError::Timeout)
|
||
|
|
);
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
assert_eq!(rx.recv_timeout(Duration::from_millis(1)), Ok(1));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn smoke_threads() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
});
|
||
|
|
assert_eq!(rx.recv().unwrap(), 1);
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn smoke_port_gone() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
drop(rx);
|
||
|
|
assert!(tx.send(1).is_err());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn smoke_shared_port_gone2() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
drop(rx);
|
||
|
|
let tx2 = tx.clone();
|
||
|
|
drop(tx);
|
||
|
|
assert!(tx2.send(1).is_err());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn port_gone_concurrent() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
rx.recv().unwrap();
|
||
|
|
});
|
||
|
|
while tx.send(1).is_ok() {}
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn port_gone_concurrent_shared() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let tx2 = tx.clone();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
rx.recv().unwrap();
|
||
|
|
});
|
||
|
|
while tx.send(1).is_ok() && tx2.send(1).is_ok() {}
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn smoke_chan_gone() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
drop(tx);
|
||
|
|
assert!(rx.recv().is_err());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn smoke_chan_gone_shared() {
|
||
|
|
let (tx, rx) = sync_channel::<()>(0);
|
||
|
|
let tx2 = tx.clone();
|
||
|
|
drop(tx);
|
||
|
|
drop(tx2);
|
||
|
|
assert!(rx.recv().is_err());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn chan_gone_concurrent() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
});
|
||
|
|
while rx.recv().is_ok() {}
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn stress() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for _ in 0..10000 {
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
for _ in 0..10000 {
|
||
|
|
assert_eq!(rx.recv().unwrap(), 1);
|
||
|
|
}
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn stress_recv_timeout_two_threads() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for _ in 0..10000 {
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
let mut recv_count = 0;
|
||
|
|
loop {
|
||
|
|
match rx.recv_timeout(Duration::from_millis(1)) {
|
||
|
|
Ok(v) => {
|
||
|
|
assert_eq!(v, 1);
|
||
|
|
recv_count += 1;
|
||
|
|
}
|
||
|
|
Err(RecvTimeoutError::Timeout) => continue,
|
||
|
|
Err(RecvTimeoutError::Disconnected) => break,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
assert_eq!(recv_count, 10000);
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn stress_recv_timeout_shared() {
|
||
|
|
const AMT: u32 = 1000;
|
||
|
|
const NTHREADS: u32 = 8;
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let (dtx, drx) = sync_channel::<()>(0);
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
let mut recv_count = 0;
|
||
|
|
loop {
|
||
|
|
match rx.recv_timeout(Duration::from_millis(10)) {
|
||
|
|
Ok(v) => {
|
||
|
|
assert_eq!(v, 1);
|
||
|
|
recv_count += 1;
|
||
|
|
}
|
||
|
|
Err(RecvTimeoutError::Timeout) => continue,
|
||
|
|
Err(RecvTimeoutError::Disconnected) => break,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
assert_eq!(recv_count, AMT * NTHREADS);
|
||
|
|
assert!(rx.try_recv().is_err());
|
||
|
|
|
||
|
|
dtx.send(()).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
let mut ts = Vec::with_capacity(NTHREADS as usize);
|
||
|
|
for _ in 0..NTHREADS {
|
||
|
|
let tx = tx.clone();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for _ in 0..AMT {
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
}
|
||
|
|
|
||
|
|
drop(tx);
|
||
|
|
|
||
|
|
drx.recv().unwrap();
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn stress_shared() {
|
||
|
|
const AMT: u32 = 1000;
|
||
|
|
const NTHREADS: u32 = 8;
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let (dtx, drx) = sync_channel::<()>(0);
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for _ in 0..AMT * NTHREADS {
|
||
|
|
assert_eq!(rx.recv().unwrap(), 1);
|
||
|
|
}
|
||
|
|
match rx.try_recv() {
|
||
|
|
Ok(..) => panic!(),
|
||
|
|
_ => {}
|
||
|
|
}
|
||
|
|
dtx.send(()).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
let mut ts = Vec::with_capacity(NTHREADS as usize);
|
||
|
|
for _ in 0..NTHREADS {
|
||
|
|
let tx = tx.clone();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for _ in 0..AMT {
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
}
|
||
|
|
drop(tx);
|
||
|
|
drx.recv().unwrap();
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_close_port_first() {
|
||
|
|
// Simple test of closing without sending
|
||
|
|
let (_tx, rx) = sync_channel::<i32>(0);
|
||
|
|
drop(rx);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_close_chan_first() {
|
||
|
|
// Simple test of closing without sending
|
||
|
|
let (tx, _rx) = sync_channel::<i32>(0);
|
||
|
|
drop(tx);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_send_port_close() {
|
||
|
|
// Testing that the sender cleans up the payload if receiver is closed
|
||
|
|
let (tx, rx) = sync_channel::<Box<i32>>(0);
|
||
|
|
drop(rx);
|
||
|
|
assert!(tx.send(Box::new(0)).is_err());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_recv_chan_close() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
drop(tx);
|
||
|
|
assert_eq!(rx.recv(), Err(RecvError));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_send_then_recv() {
|
||
|
|
let (tx, rx) = sync_channel::<Box<i32>>(1);
|
||
|
|
tx.send(Box::new(10)).unwrap();
|
||
|
|
assert!(*rx.recv().unwrap() == 10);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_try_send_open() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(1);
|
||
|
|
assert_eq!(tx.try_send(10), Ok(()));
|
||
|
|
assert!(rx.recv().unwrap() == 10);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_try_send_closed() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
drop(rx);
|
||
|
|
assert_eq!(tx.try_send(10), Err(TrySendError::Disconnected(10)));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_try_send_closed2() {
|
||
|
|
let (tx, _rx) = sync_channel::<i32>(0);
|
||
|
|
assert_eq!(tx.try_send(10), Err(TrySendError::Full(10)));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_try_recv_open() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(1);
|
||
|
|
tx.send(10).unwrap();
|
||
|
|
assert!(rx.recv() == Ok(10));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_try_recv_closed() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
drop(tx);
|
||
|
|
assert!(rx.recv().is_err());
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_try_recv_closed_with_data() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(1);
|
||
|
|
tx.send(10).unwrap();
|
||
|
|
drop(tx);
|
||
|
|
assert_eq!(rx.try_recv(), Ok(10));
|
||
|
|
assert_eq!(rx.try_recv(), Err(TryRecvError::Disconnected));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_peek_data() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(1);
|
||
|
|
assert_eq!(rx.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
tx.send(10).unwrap();
|
||
|
|
assert_eq!(rx.try_recv(), Ok(10));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_peek_close() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
drop(tx);
|
||
|
|
assert_eq!(rx.try_recv(), Err(TryRecvError::Disconnected));
|
||
|
|
assert_eq!(rx.try_recv(), Err(TryRecvError::Disconnected));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_single_thread_peek_open() {
|
||
|
|
let (_tx, rx) = sync_channel::<i32>(0);
|
||
|
|
assert_eq!(rx.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_task_recv_then_send() {
|
||
|
|
let (tx, rx) = sync_channel::<Box<i32>>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
assert!(*rx.recv().unwrap() == 10);
|
||
|
|
});
|
||
|
|
|
||
|
|
tx.send(Box::new(10)).unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_task_recv_then_close() {
|
||
|
|
let (tx, rx) = sync_channel::<Box<i32>>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
drop(tx);
|
||
|
|
});
|
||
|
|
thread::spawn(move || {
|
||
|
|
assert_eq!(rx.recv(), Err(RecvError));
|
||
|
|
})
|
||
|
|
.join()
|
||
|
|
.unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_thread_close_stress() {
|
||
|
|
let stress_factor = stress_factor();
|
||
|
|
let mut ts = Vec::with_capacity(stress_factor);
|
||
|
|
for _ in 0..stress_factor {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
drop(rx);
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
drop(tx);
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_thread_send_close_stress() {
|
||
|
|
let stress_factor = stress_factor();
|
||
|
|
let mut ts = Vec::with_capacity(stress_factor);
|
||
|
|
for _ in 0..stress_factor {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
drop(rx);
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
thread::spawn(move || {
|
||
|
|
let _ = tx.send(1);
|
||
|
|
})
|
||
|
|
.join()
|
||
|
|
.unwrap();
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_thread_recv_close_stress() {
|
||
|
|
let stress_factor = stress_factor();
|
||
|
|
let mut ts = Vec::with_capacity(2 * stress_factor);
|
||
|
|
for _ in 0..stress_factor {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
thread::spawn(move || {
|
||
|
|
assert_eq!(rx.recv(), Err(RecvError));
|
||
|
|
})
|
||
|
|
.join()
|
||
|
|
.unwrap();
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
let t2 = thread::spawn(move || {
|
||
|
|
thread::spawn(move || {
|
||
|
|
drop(tx);
|
||
|
|
});
|
||
|
|
});
|
||
|
|
ts.push(t2);
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_multi_thread_send_recv_stress() {
|
||
|
|
let stress_factor = stress_factor();
|
||
|
|
let mut ts = Vec::with_capacity(stress_factor);
|
||
|
|
for _ in 0..stress_factor {
|
||
|
|
let (tx, rx) = sync_channel::<Box<i32>>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
tx.send(Box::new(10)).unwrap();
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
assert!(*rx.recv().unwrap() == 10);
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn stream_send_recv_stress() {
|
||
|
|
let stress_factor = stress_factor();
|
||
|
|
let mut ts = Vec::with_capacity(2 * stress_factor);
|
||
|
|
for _ in 0..stress_factor {
|
||
|
|
let (tx, rx) = sync_channel::<Box<i32>>(0);
|
||
|
|
|
||
|
|
if let Some(t) = send(tx, 0) {
|
||
|
|
ts.push(t);
|
||
|
|
}
|
||
|
|
if let Some(t) = recv(rx, 0) {
|
||
|
|
ts.push(t);
|
||
|
|
}
|
||
|
|
|
||
|
|
fn send(tx: SyncSender<Box<i32>>, i: i32) -> Option<JoinHandle<()>> {
|
||
|
|
if i == 10 {
|
||
|
|
return None;
|
||
|
|
}
|
||
|
|
|
||
|
|
Some(thread::spawn(move || {
|
||
|
|
tx.send(Box::new(i)).unwrap();
|
||
|
|
send(tx, i + 1);
|
||
|
|
}))
|
||
|
|
}
|
||
|
|
|
||
|
|
fn recv(rx: Receiver<Box<i32>>, i: i32) -> Option<JoinHandle<()>> {
|
||
|
|
if i == 10 {
|
||
|
|
return None;
|
||
|
|
}
|
||
|
|
|
||
|
|
Some(thread::spawn(move || {
|
||
|
|
assert!(*rx.recv().unwrap() == i);
|
||
|
|
recv(rx, i + 1);
|
||
|
|
}))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn recv_a_lot() {
|
||
|
|
// Regression test that we don't run out of stack in scheduler context
|
||
|
|
let (tx, rx) = sync_channel(10000);
|
||
|
|
for _ in 0..10000 {
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
}
|
||
|
|
for _ in 0..10000 {
|
||
|
|
rx.recv().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn shared_chan_stress() {
|
||
|
|
let (tx, rx) = sync_channel(0);
|
||
|
|
let total = stress_factor() + 100;
|
||
|
|
let mut ts = Vec::with_capacity(total);
|
||
|
|
for _ in 0..total {
|
||
|
|
let tx = tx.clone();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
});
|
||
|
|
ts.push(t);
|
||
|
|
}
|
||
|
|
|
||
|
|
for _ in 0..total {
|
||
|
|
rx.recv().unwrap();
|
||
|
|
}
|
||
|
|
for t in ts {
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_nested_recv_iter() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let (total_tx, total_rx) = sync_channel::<i32>(0);
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
let mut acc = 0;
|
||
|
|
for x in rx.iter() {
|
||
|
|
acc += x;
|
||
|
|
}
|
||
|
|
total_tx.send(acc).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
tx.send(3).unwrap();
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
tx.send(2).unwrap();
|
||
|
|
drop(tx);
|
||
|
|
assert_eq!(total_rx.recv().unwrap(), 6);
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_recv_iter_break() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let (count_tx, count_rx) = sync_channel(0);
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
let mut count = 0;
|
||
|
|
for x in rx.iter() {
|
||
|
|
if count >= 3 {
|
||
|
|
break;
|
||
|
|
} else {
|
||
|
|
count += x;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
count_tx.send(count).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
tx.send(2).unwrap();
|
||
|
|
tx.send(2).unwrap();
|
||
|
|
tx.send(2).unwrap();
|
||
|
|
let _ = tx.try_send(2);
|
||
|
|
drop(tx);
|
||
|
|
assert_eq!(count_rx.recv().unwrap(), 4);
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn try_recv_states() {
|
||
|
|
let (tx1, rx1) = sync_channel::<i32>(1);
|
||
|
|
let (tx2, rx2) = sync_channel::<()>(1);
|
||
|
|
let (tx3, rx3) = sync_channel::<()>(1);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
rx2.recv().unwrap();
|
||
|
|
tx1.send(1).unwrap();
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
rx2.recv().unwrap();
|
||
|
|
drop(tx1);
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
assert_eq!(rx1.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
assert_eq!(rx1.try_recv(), Ok(1));
|
||
|
|
assert_eq!(rx1.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
assert_eq!(rx1.try_recv(), Err(TryRecvError::Disconnected));
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
// This bug used to end up in a livelock inside of the Receiver destructor
|
||
|
|
// because the internal state of the Shared packet was corrupted
|
||
|
|
#[test]
|
||
|
|
fn destroy_upgraded_shared_port_when_sender_still_active() {
|
||
|
|
let (tx, rx) = sync_channel::<()>(0);
|
||
|
|
let (tx2, rx2) = sync_channel::<()>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
rx.recv().unwrap(); // wait on a oneshot
|
||
|
|
drop(rx); // destroy a shared
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
});
|
||
|
|
// make sure the other thread has gone to sleep
|
||
|
|
for _ in 0..5000 {
|
||
|
|
thread::yield_now();
|
||
|
|
}
|
||
|
|
|
||
|
|
// upgrade to a shared chan and send a message
|
||
|
|
let tx2 = tx.clone();
|
||
|
|
drop(tx);
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
|
||
|
|
// wait for the child thread to exit before we exit
|
||
|
|
rx2.recv().unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn send1() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
rx.recv().unwrap();
|
||
|
|
});
|
||
|
|
assert_eq!(tx.send(1), Ok(()));
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn send2() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
drop(rx);
|
||
|
|
});
|
||
|
|
assert!(tx.send(1).is_err());
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn send3() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(1);
|
||
|
|
assert_eq!(tx.send(1), Ok(()));
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
drop(rx);
|
||
|
|
});
|
||
|
|
assert!(tx.send(1).is_err());
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn send4() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let tx2 = tx.clone();
|
||
|
|
let (done, donerx) = channel();
|
||
|
|
let done2 = done.clone();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
assert!(tx.send(1).is_err());
|
||
|
|
done.send(()).unwrap();
|
||
|
|
});
|
||
|
|
let t2 = thread::spawn(move || {
|
||
|
|
assert!(tx2.send(2).is_err());
|
||
|
|
done2.send(()).unwrap();
|
||
|
|
});
|
||
|
|
drop(rx);
|
||
|
|
donerx.recv().unwrap();
|
||
|
|
donerx.recv().unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
t2.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn try_send1() {
|
||
|
|
let (tx, _rx) = sync_channel::<i32>(0);
|
||
|
|
assert_eq!(tx.try_send(1), Err(TrySendError::Full(1)));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn try_send2() {
|
||
|
|
let (tx, _rx) = sync_channel::<i32>(1);
|
||
|
|
assert_eq!(tx.try_send(1), Ok(()));
|
||
|
|
assert_eq!(tx.try_send(1), Err(TrySendError::Full(1)));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn try_send3() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(1);
|
||
|
|
assert_eq!(tx.try_send(1), Ok(()));
|
||
|
|
drop(rx);
|
||
|
|
assert_eq!(tx.try_send(1), Err(TrySendError::Disconnected(1)));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn issue_15761() {
|
||
|
|
fn repro() {
|
||
|
|
let (tx1, rx1) = sync_channel::<()>(3);
|
||
|
|
let (tx2, rx2) = sync_channel::<()>(3);
|
||
|
|
|
||
|
|
let _t = thread::spawn(move || {
|
||
|
|
rx1.recv().unwrap();
|
||
|
|
tx2.try_send(()).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
tx1.try_send(()).unwrap();
|
||
|
|
rx2.recv().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
for _ in 0..100 {
|
||
|
|
repro()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Source: https://github.com/rust-lang/rust/blob/master/src/libstd/sync/mpsc/select.rs
|
||
|
|
mod select_tests {
|
||
|
|
use super::*;
|
||
|
|
|
||
|
|
use std::thread;
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn smoke() {
|
||
|
|
let (tx1, rx1) = channel::<i32>();
|
||
|
|
let (tx2, rx2) = channel::<i32>();
|
||
|
|
tx1.send(1).unwrap();
|
||
|
|
select! {
|
||
|
|
foo = rx1.recv() => { assert_eq!(foo.unwrap(), 1); },
|
||
|
|
_bar = rx2.recv() => { panic!() }
|
||
|
|
}
|
||
|
|
tx2.send(2).unwrap();
|
||
|
|
select! {
|
||
|
|
_foo = rx1.recv() => { panic!() },
|
||
|
|
bar = rx2.recv() => { assert_eq!(bar.unwrap(), 2) }
|
||
|
|
}
|
||
|
|
drop(tx1);
|
||
|
|
select! {
|
||
|
|
foo = rx1.recv() => { assert!(foo.is_err()); },
|
||
|
|
_bar = rx2.recv() => { panic!() }
|
||
|
|
}
|
||
|
|
drop(tx2);
|
||
|
|
select! {
|
||
|
|
bar = rx2.recv() => { assert!(bar.is_err()); }
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn smoke2() {
|
||
|
|
let (_tx1, rx1) = channel::<i32>();
|
||
|
|
let (_tx2, rx2) = channel::<i32>();
|
||
|
|
let (_tx3, rx3) = channel::<i32>();
|
||
|
|
let (_tx4, rx4) = channel::<i32>();
|
||
|
|
let (tx5, rx5) = channel::<i32>();
|
||
|
|
tx5.send(4).unwrap();
|
||
|
|
select! {
|
||
|
|
_foo = rx1.recv() => { panic!("1") },
|
||
|
|
_foo = rx2.recv() => { panic!("2") },
|
||
|
|
_foo = rx3.recv() => { panic!("3") },
|
||
|
|
_foo = rx4.recv() => { panic!("4") },
|
||
|
|
foo = rx5.recv() => { assert_eq!(foo.unwrap(), 4); }
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn closed() {
|
||
|
|
let (_tx1, rx1) = channel::<i32>();
|
||
|
|
let (tx2, rx2) = channel::<i32>();
|
||
|
|
drop(tx2);
|
||
|
|
|
||
|
|
select! {
|
||
|
|
_a1 = rx1.recv() => { panic!() },
|
||
|
|
a2 = rx2.recv() => { assert!(a2.is_err()); }
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn unblocks() {
|
||
|
|
let (tx1, rx1) = channel::<i32>();
|
||
|
|
let (_tx2, rx2) = channel::<i32>();
|
||
|
|
let (tx3, rx3) = channel::<i32>();
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for _ in 0..20 {
|
||
|
|
thread::yield_now();
|
||
|
|
}
|
||
|
|
tx1.send(1).unwrap();
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
for _ in 0..20 {
|
||
|
|
thread::yield_now();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
select! {
|
||
|
|
a = rx1.recv() => { assert_eq!(a.unwrap(), 1); },
|
||
|
|
_b = rx2.recv() => { panic!() }
|
||
|
|
}
|
||
|
|
tx3.send(1).unwrap();
|
||
|
|
select! {
|
||
|
|
a = rx1.recv() => { assert!(a.is_err()) },
|
||
|
|
_b = rx2.recv() => { panic!() }
|
||
|
|
}
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn both_ready() {
|
||
|
|
let (tx1, rx1) = channel::<i32>();
|
||
|
|
let (tx2, rx2) = channel::<i32>();
|
||
|
|
let (tx3, rx3) = channel::<()>();
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for _ in 0..20 {
|
||
|
|
thread::yield_now();
|
||
|
|
}
|
||
|
|
tx1.send(1).unwrap();
|
||
|
|
tx2.send(2).unwrap();
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
select! {
|
||
|
|
a = rx1.recv() => { assert_eq!(a.unwrap(), 1); },
|
||
|
|
a = rx2.recv() => { assert_eq!(a.unwrap(), 2); }
|
||
|
|
}
|
||
|
|
select! {
|
||
|
|
a = rx1.recv() => { assert_eq!(a.unwrap(), 1); },
|
||
|
|
a = rx2.recv() => { assert_eq!(a.unwrap(), 2); }
|
||
|
|
}
|
||
|
|
assert_eq!(rx1.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
assert_eq!(rx2.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn stress() {
|
||
|
|
const AMT: i32 = 10000;
|
||
|
|
let (tx1, rx1) = channel::<i32>();
|
||
|
|
let (tx2, rx2) = channel::<i32>();
|
||
|
|
let (tx3, rx3) = channel::<()>();
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for i in 0..AMT {
|
||
|
|
if i % 2 == 0 {
|
||
|
|
tx1.send(i).unwrap();
|
||
|
|
} else {
|
||
|
|
tx2.send(i).unwrap();
|
||
|
|
}
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
for i in 0..AMT {
|
||
|
|
select! {
|
||
|
|
i1 = rx1.recv() => { assert!(i % 2 == 0 && i == i1.unwrap()); },
|
||
|
|
i2 = rx2.recv() => { assert!(i % 2 == 1 && i == i2.unwrap()); }
|
||
|
|
}
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
}
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[allow(unused_must_use)]
|
||
|
|
#[test]
|
||
|
|
fn cloning() {
|
||
|
|
let (tx1, rx1) = channel::<i32>();
|
||
|
|
let (_tx2, rx2) = channel::<i32>();
|
||
|
|
let (tx3, rx3) = channel::<()>();
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
tx1.clone();
|
||
|
|
assert_eq!(rx3.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
tx1.send(2).unwrap();
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
select! {
|
||
|
|
_i1 = rx1.recv() => {},
|
||
|
|
_i2 = rx2.recv() => panic!()
|
||
|
|
}
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[allow(unused_must_use)]
|
||
|
|
#[test]
|
||
|
|
fn cloning2() {
|
||
|
|
let (tx1, rx1) = channel::<i32>();
|
||
|
|
let (_tx2, rx2) = channel::<i32>();
|
||
|
|
let (tx3, rx3) = channel::<()>();
|
||
|
|
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
tx1.clone();
|
||
|
|
assert_eq!(rx3.try_recv(), Err(TryRecvError::Empty));
|
||
|
|
tx1.send(2).unwrap();
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
select! {
|
||
|
|
_i1 = rx1.recv() => {},
|
||
|
|
_i2 = rx2.recv() => panic!()
|
||
|
|
}
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn cloning3() {
|
||
|
|
let (tx1, rx1) = channel::<()>();
|
||
|
|
let (tx2, rx2) = channel::<()>();
|
||
|
|
let (tx3, rx3) = channel::<()>();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
select! {
|
||
|
|
_ = rx1.recv() => panic!(),
|
||
|
|
_ = rx2.recv() => {}
|
||
|
|
}
|
||
|
|
tx3.send(()).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
for _ in 0..1000 {
|
||
|
|
thread::yield_now();
|
||
|
|
}
|
||
|
|
drop(tx1.clone());
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
rx3.recv().unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn preflight1() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
select! {
|
||
|
|
_n = rx.recv() => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn preflight2() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
select! {
|
||
|
|
_n = rx.recv() => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn preflight3() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
drop(tx.clone());
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
select! {
|
||
|
|
_n = rx.recv() => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn preflight4() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
select! {
|
||
|
|
_ = rx.recv() => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn preflight5() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
select! {
|
||
|
|
_ = rx.recv() => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn preflight6() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
drop(tx.clone());
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
select! {
|
||
|
|
_ = rx.recv() => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn preflight7() {
|
||
|
|
let (tx, rx) = channel::<()>();
|
||
|
|
drop(tx);
|
||
|
|
select! {
|
||
|
|
_ = rx.recv() => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn preflight8() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
drop(tx);
|
||
|
|
rx.recv().unwrap();
|
||
|
|
select! {
|
||
|
|
_ = rx.recv() => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn preflight9() {
|
||
|
|
let (tx, rx) = channel();
|
||
|
|
drop(tx.clone());
|
||
|
|
tx.send(()).unwrap();
|
||
|
|
drop(tx);
|
||
|
|
rx.recv().unwrap();
|
||
|
|
select! {
|
||
|
|
_ = rx.recv() => {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn oneshot_data_waiting() {
|
||
|
|
let (tx1, rx1) = channel();
|
||
|
|
let (tx2, rx2) = channel();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
select! {
|
||
|
|
_n = rx1.recv() => {}
|
||
|
|
}
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
for _ in 0..100 {
|
||
|
|
thread::yield_now()
|
||
|
|
}
|
||
|
|
tx1.send(()).unwrap();
|
||
|
|
rx2.recv().unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn stream_data_waiting() {
|
||
|
|
let (tx1, rx1) = channel();
|
||
|
|
let (tx2, rx2) = channel();
|
||
|
|
tx1.send(()).unwrap();
|
||
|
|
tx1.send(()).unwrap();
|
||
|
|
rx1.recv().unwrap();
|
||
|
|
rx1.recv().unwrap();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
select! {
|
||
|
|
_n = rx1.recv() => {}
|
||
|
|
}
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
for _ in 0..100 {
|
||
|
|
thread::yield_now()
|
||
|
|
}
|
||
|
|
tx1.send(()).unwrap();
|
||
|
|
rx2.recv().unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn shared_data_waiting() {
|
||
|
|
let (tx1, rx1) = channel();
|
||
|
|
let (tx2, rx2) = channel();
|
||
|
|
drop(tx1.clone());
|
||
|
|
tx1.send(()).unwrap();
|
||
|
|
rx1.recv().unwrap();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
select! {
|
||
|
|
_n = rx1.recv() => {}
|
||
|
|
}
|
||
|
|
tx2.send(()).unwrap();
|
||
|
|
});
|
||
|
|
|
||
|
|
for _ in 0..100 {
|
||
|
|
thread::yield_now()
|
||
|
|
}
|
||
|
|
tx1.send(()).unwrap();
|
||
|
|
rx2.recv().unwrap();
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn sync1() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(1);
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
select! {
|
||
|
|
n = rx.recv() => { assert_eq!(n.unwrap(), 1); }
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn sync2() {
|
||
|
|
let (tx, rx) = sync_channel::<i32>(0);
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
for _ in 0..100 {
|
||
|
|
thread::yield_now()
|
||
|
|
}
|
||
|
|
tx.send(1).unwrap();
|
||
|
|
});
|
||
|
|
select! {
|
||
|
|
n = rx.recv() => { assert_eq!(n.unwrap(), 1); }
|
||
|
|
}
|
||
|
|
t.join().unwrap();
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn sync3() {
|
||
|
|
let (tx1, rx1) = sync_channel::<i32>(0);
|
||
|
|
let (tx2, rx2): (Sender<i32>, Receiver<i32>) = channel();
|
||
|
|
let t = thread::spawn(move || {
|
||
|
|
tx1.send(1).unwrap();
|
||
|
|
});
|
||
|
|
let t2 = thread::spawn(move || {
|
||
|
|
tx2.send(2).unwrap();
|
||
|
|
});
|
||
|
|
select! {
|
||
|
|
n = rx1.recv() => {
|
||
|
|
let n = n.unwrap();
|
||
|
|
assert_eq!(n, 1);
|
||
|
|
assert_eq!(rx2.recv().unwrap(), 2);
|
||
|
|
},
|
||
|
|
n = rx2.recv() => {
|
||
|
|
let n = n.unwrap();
|
||
|
|
assert_eq!(n, 2);
|
||
|
|
assert_eq!(rx1.recv().unwrap(), 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
t.join().unwrap();
|
||
|
|
t2.join().unwrap();
|
||
|
|
}
|
||
|
|
}
|