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-rw-r--r--vendor/flume/tests/mpsc.rs2095
1 files changed, 0 insertions, 2095 deletions
diff --git a/vendor/flume/tests/mpsc.rs b/vendor/flume/tests/mpsc.rs
deleted file mode 100644
index 213b9d8..0000000
--- a/vendor/flume/tests/mpsc.rs
+++ /dev/null
@@ -1,2095 +0,0 @@
-//! Tests copied from `std::sync::mpsc`.
-//!
-//! This is a copy of tests for the `std::sync::mpsc` channels from the standard library, but
-//! modified to work with `crossbeam-channel` instead.
-//!
-//! Minor tweaks were needed to make the tests compile:
-//!
-//! - Replace `box` syntax with `Box::new`.
-//! - Replace all uses of `Select` with `select!`.
-//! - Change the imports.
-//! - Join all spawned threads.
-//! - Removed assertion from oneshot_multi_thread_send_close_stress tests.
-//!
-//! Source:
-//! - https://github.com/rust-lang/rust/tree/master/src/libstd/sync/mpsc
-//!
-//! Copyright & License:
-//! - Copyright 2013-2014 The Rust Project Developers
-//! - Apache License, Version 2.0 or MIT license, at your option
-//! - https://github.com/rust-lang/rust/blob/master/COPYRIGHT
-//! - https://www.rust-lang.org/en-US/legal.html
-
-#[macro_use]
-extern crate crossbeam_channel as cc;
-
-use std::sync::mpsc::{RecvError, RecvTimeoutError, TryRecvError};
-use std::sync::mpsc::{SendError, TrySendError};
-use std::thread::JoinHandle;
-use std::time::Duration;
-
-pub struct Sender<T> {
- pub inner: cc::Sender<T>,
-}
-
-impl<T> Sender<T> {
- pub fn send(&self, t: T) -> Result<(), SendError<T>> {
- self.inner.send(t).map_err(|cc::SendError(m)| SendError(m))
- }
-}
-
-impl<T> Clone for Sender<T> {
- fn clone(&self) -> Sender<T> {
- Sender {
- inner: self.inner.clone(),
- }
- }
-}
-
-pub struct SyncSender<T> {
- pub inner: cc::Sender<T>,
-}
-
-impl<T> SyncSender<T> {
- pub fn send(&self, t: T) -> Result<(), SendError<T>> {
- self.inner.send(t).map_err(|cc::SendError(m)| SendError(m))
- }
-
- pub fn try_send(&self, t: T) -> Result<(), TrySendError<T>> {
- self.inner.try_send(t).map_err(|err| match err {
- cc::TrySendError::Full(m) => TrySendError::Full(m),
- cc::TrySendError::Disconnected(m) => TrySendError::Disconnected(m),
- })
- }
-}
-
-impl<T> Clone for SyncSender<T> {
- fn clone(&self) -> SyncSender<T> {
- SyncSender {
- inner: self.inner.clone(),
- }
- }
-}
-
-pub struct Receiver<T> {
- pub inner: cc::Receiver<T>,
-}
-
-impl<T> Receiver<T> {
- pub fn try_recv(&self) -> Result<T, TryRecvError> {
- self.inner.try_recv().map_err(|err| match err {
- cc::TryRecvError::Empty => TryRecvError::Empty,
- cc::TryRecvError::Disconnected => TryRecvError::Disconnected,
- })
- }
-
- pub fn recv(&self) -> Result<T, RecvError> {
- self.inner.recv().map_err(|_| RecvError)
- }
-
- pub fn recv_timeout(&self, timeout: Duration) -> Result<T, RecvTimeoutError> {
- self.inner.recv_timeout(timeout).map_err(|err| match err {
- cc::RecvTimeoutError::Timeout => RecvTimeoutError::Timeout,
- cc::RecvTimeoutError::Disconnected => RecvTimeoutError::Disconnected,
- })
- }
-
- pub fn iter(&self) -> Iter<T> {
- Iter { inner: self }
- }
-
- pub fn try_iter(&self) -> TryIter<T> {
- TryIter { inner: self }
- }
-}
-
-impl<'a, T> IntoIterator for &'a Receiver<T> {
- type Item = T;
- type IntoIter = Iter<'a, T>;
-
- fn into_iter(self) -> Iter<'a, T> {
- self.iter()
- }
-}
-
-impl<T> IntoIterator for Receiver<T> {
- type Item = T;
- type IntoIter = IntoIter<T>;
-
- fn into_iter(self) -> IntoIter<T> {
- IntoIter { inner: self }
- }
-}
-
-pub struct TryIter<'a, T: 'a> {
- inner: &'a Receiver<T>,
-}
-
-impl<'a, T> Iterator for TryIter<'a, T> {
- type Item = T;
-
- fn next(&mut self) -> Option<T> {
- self.inner.try_recv().ok()
- }
-}
-
-pub struct Iter<'a, T: 'a> {
- inner: &'a Receiver<T>,
-}
-
-impl<'a, T> Iterator for Iter<'a, T> {
- type Item = T;
-
- fn next(&mut self) -> Option<T> {
- self.inner.recv().ok()
- }
-}
-
-pub struct IntoIter<T> {
- inner: Receiver<T>,
-}
-
-impl<T> Iterator for IntoIter<T> {
- type Item = T;
-
- fn next(&mut self) -> Option<T> {
- self.inner.recv().ok()
- }
-}
-
-pub fn channel<T>() -> (Sender<T>, Receiver<T>) {
- let (s, r) = cc::unbounded();
- let s = Sender { inner: s };
- let r = Receiver { inner: r };
- (s, r)
-}
-
-pub fn sync_channel<T>(bound: usize) -> (SyncSender<T>, Receiver<T>) {
- let (s, r) = cc::bounded(bound);
- let s = SyncSender { inner: s };
- let r = Receiver { inner: r };
- (s, r)
-}
-
-macro_rules! select {
- (
- $($name:pat = $rx:ident.$meth:ident() => $code:expr),+
- ) => ({
- crossbeam_channel_internal! {
- $(
- recv(($rx).inner) -> res => {
- let $name = res.map_err(|_| ::std::sync::mpsc::RecvError);
- $code
- }
- )+
- }
- })
-}
-
-// Source: https://github.com/rust-lang/rust/blob/master/src/libstd/sync/mpsc/mod.rs
-mod channel_tests {
- use super::*;
-
- use std::env;
- use std::thread;
- use std::time::{Duration, Instant};
-
- pub fn stress_factor() -> usize {
- match env::var("RUST_TEST_STRESS") {
- Ok(val) => val.parse().unwrap(),
- Err(..) => 1,
- }
- }
-
- #[test]
- fn smoke() {
- let (tx, rx) = channel::<i32>();
- tx.send(1).unwrap();
- assert_eq!(rx.recv().unwrap(), 1);
- }
-
- #[test]
- fn drop_full() {
- let (tx, _rx) = channel::<Box<isize>>();
- tx.send(Box::new(1)).unwrap();
- }
-
- #[test]
- fn drop_full_shared() {
- let (tx, _rx) = channel::<Box<isize>>();
- drop(tx.clone());
- drop(tx.clone());
- tx.send(Box::new(1)).unwrap();
- }
-
- #[test]
- fn smoke_shared() {
- let (tx, rx) = channel::<i32>();
- 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 smoke_threads() {
- let (tx, rx) = channel::<i32>();
- 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) = channel::<i32>();
- drop(rx);
- assert!(tx.send(1).is_err());
- }
-
- #[test]
- fn smoke_shared_port_gone() {
- let (tx, rx) = channel::<i32>();
- drop(rx);
- assert!(tx.send(1).is_err())
- }
-
- #[test]
- fn smoke_shared_port_gone2() {
- let (tx, rx) = channel::<i32>();
- drop(rx);
- let tx2 = tx.clone();
- drop(tx);
- assert!(tx2.send(1).is_err());
- }
-
- #[test]
- fn port_gone_concurrent() {
- let (tx, rx) = channel::<i32>();
- 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) = channel::<i32>();
- 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) = channel::<i32>();
- drop(tx);
- assert!(rx.recv().is_err());
- }
-
- #[test]
- fn smoke_chan_gone_shared() {
- let (tx, rx) = channel::<()>();
- let tx2 = tx.clone();
- drop(tx);
- drop(tx2);
- assert!(rx.recv().is_err());
- }
-
- #[test]
- fn chan_gone_concurrent() {
- let (tx, rx) = channel::<i32>();
- 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) = channel::<i32>();
- 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().ok().unwrap();
- }
-
- #[test]
- fn stress_shared() {
- const AMT: u32 = 10000;
- const NTHREADS: u32 = 8;
- let (tx, rx) = channel::<i32>();
-
- let t = thread::spawn(move || {
- for _ in 0..AMT * NTHREADS {
- assert_eq!(rx.recv().unwrap(), 1);
- }
- match rx.try_recv() {
- Ok(..) => panic!(),
- _ => {}
- }
- });
-
- 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);
- 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();
- }
-}
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