mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-27 19:16:36 +00:00
889f7cbffa
`stress_recv_timeout_two_threads`, in the mpmc and mpsc testsuites, is a stress test of the `recv_timeout` function. This test processes and ignores timeouts, and just ensures that every sent value gets received. As such, the exact length of the timeouts is not critical, only that the timeout and sleep durations ensure that at least one timeout occurred. The current tests have 100 iterations, half of which sleep for 200ms, causing the test to take 10s. This represents around 2/3rds of the *total* runtime of the `library/std` testsuite. Reduce this to 50 iterations where half of them sleep for 10ms, causing the test to take 0.25s. Add a check that at least one timeout occurred.
728 lines
17 KiB
Rust
728 lines
17 KiB
Rust
use std::sync::mpsc::*;
|
|
use std::time::{Duration, Instant};
|
|
use std::{env, thread};
|
|
|
|
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);
|
|
}
|
|
|
|
#[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() {}
|
|
}
|
|
|
|
#[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() {}
|
|
}
|
|
|
|
#[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() {}
|
|
}
|
|
|
|
#[test]
|
|
fn stress() {
|
|
let count = if cfg!(miri) { 100 } else { 10000 };
|
|
let (tx, rx) = channel::<i32>();
|
|
let t = thread::spawn(move || {
|
|
for _ in 0..count {
|
|
tx.send(1).unwrap();
|
|
}
|
|
});
|
|
for _ in 0..count {
|
|
assert_eq!(rx.recv().unwrap(), 1);
|
|
}
|
|
t.join().ok().expect("thread panicked");
|
|
}
|
|
|
|
#[test]
|
|
fn stress_shared() {
|
|
const AMT: u32 = if cfg!(miri) { 100 } else { 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!(),
|
|
_ => {}
|
|
}
|
|
});
|
|
|
|
for _ in 0..NTHREADS {
|
|
let tx = tx.clone();
|
|
thread::spawn(move || {
|
|
for _ in 0..AMT {
|
|
tx.send(1).unwrap();
|
|
}
|
|
});
|
|
}
|
|
drop(tx);
|
|
t.join().ok().expect("thread panicked");
|
|
}
|
|
|
|
#[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().expect("thread panicked");
|
|
t2.join().ok().expect("thread panicked");
|
|
}
|
|
|
|
#[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().expect("thread panicked");
|
|
}
|
|
|
|
#[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().expect("thread panicked");
|
|
t2.join().ok().expect("thread panicked");
|
|
}
|
|
|
|
#[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() {
|
|
// Receiving on a closed chan will panic
|
|
let res = thread::spawn(move || {
|
|
let (tx, rx) = channel::<i32>();
|
|
drop(tx);
|
|
rx.recv().unwrap();
|
|
})
|
|
.join();
|
|
// What is our res?
|
|
assert!(res.is_err());
|
|
}
|
|
|
|
#[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();
|
|
}
|
|
|
|
#[test]
|
|
fn oneshot_multi_task_recv_then_close() {
|
|
let (tx, rx) = channel::<Box<i32>>();
|
|
let _t = thread::spawn(move || {
|
|
drop(tx);
|
|
});
|
|
let res = thread::spawn(move || {
|
|
assert!(*rx.recv().unwrap() == 10);
|
|
})
|
|
.join();
|
|
assert!(res.is_err());
|
|
}
|
|
|
|
#[test]
|
|
fn oneshot_multi_thread_close_stress() {
|
|
for _ in 0..stress_factor() {
|
|
let (tx, rx) = channel::<i32>();
|
|
let _t = thread::spawn(move || {
|
|
drop(rx);
|
|
});
|
|
drop(tx);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn oneshot_multi_thread_send_close_stress() {
|
|
for _ in 0..stress_factor() {
|
|
let (tx, rx) = channel::<i32>();
|
|
let _t = thread::spawn(move || {
|
|
drop(rx);
|
|
});
|
|
let _ = thread::spawn(move || {
|
|
tx.send(1).unwrap();
|
|
})
|
|
.join();
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn oneshot_multi_thread_recv_close_stress() {
|
|
for _ in 0..stress_factor() {
|
|
let (tx, rx) = channel::<i32>();
|
|
thread::spawn(move || {
|
|
let res = thread::spawn(move || {
|
|
rx.recv().unwrap();
|
|
})
|
|
.join();
|
|
assert!(res.is_err());
|
|
});
|
|
let _t = thread::spawn(move || {
|
|
thread::spawn(move || {
|
|
drop(tx);
|
|
});
|
|
});
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn oneshot_multi_thread_send_recv_stress() {
|
|
for _ in 0..stress_factor() {
|
|
let (tx, rx) = channel::<Box<isize>>();
|
|
let _t = thread::spawn(move || {
|
|
tx.send(Box::new(10)).unwrap();
|
|
});
|
|
assert!(*rx.recv().unwrap() == 10);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn stream_send_recv_stress() {
|
|
for _ in 0..stress_factor() {
|
|
let (tx, rx) = channel();
|
|
|
|
send(tx, 0);
|
|
recv(rx, 0);
|
|
|
|
fn send(tx: Sender<Box<i32>>, i: i32) {
|
|
if i == 10 {
|
|
return;
|
|
}
|
|
|
|
thread::spawn(move || {
|
|
tx.send(Box::new(i)).unwrap();
|
|
send(tx, i + 1);
|
|
});
|
|
}
|
|
|
|
fn recv(rx: Receiver<Box<i32>>, i: i32) {
|
|
if i == 10 {
|
|
return;
|
|
}
|
|
|
|
thread::spawn(move || {
|
|
assert!(*rx.recv().unwrap() == i);
|
|
recv(rx, i + 1);
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
#[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() + 50;
|
|
let timeout = Duration::from_millis(5);
|
|
|
|
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;
|
|
let mut got_timeout = false;
|
|
loop {
|
|
match rx.recv_timeout(timeout) {
|
|
Ok(n) => {
|
|
assert_eq!(n, 1usize);
|
|
recv_count += 1;
|
|
}
|
|
Err(RecvTimeoutError::Timeout) => {
|
|
got_timeout = true;
|
|
continue;
|
|
}
|
|
Err(RecvTimeoutError::Disconnected) => break,
|
|
}
|
|
}
|
|
|
|
assert_eq!(recv_count, stress);
|
|
assert!(got_timeout);
|
|
}
|
|
|
|
#[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;
|
|
|
|
for i in 0..stress {
|
|
let tx = tx.clone();
|
|
thread::spawn(move || {
|
|
thread::sleep(Duration::from_millis(i as u64 * 10));
|
|
tx.send(1usize).unwrap();
|
|
});
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
#[test]
|
|
fn very_long_recv_timeout_wont_panic() {
|
|
let (tx, rx) = channel::<()>();
|
|
let join_handle = thread::spawn(move || rx.recv_timeout(Duration::from_secs(u64::MAX)));
|
|
thread::sleep(Duration::from_secs(1));
|
|
assert!(tx.send(()).is_ok());
|
|
assert_eq!(join_handle.join().unwrap(), Ok(()));
|
|
}
|
|
|
|
#[test]
|
|
fn recv_a_lot() {
|
|
let count = if cfg!(miri) { 1000 } else { 10000 };
|
|
// Regression test that we don't run out of stack in scheduler context
|
|
let (tx, rx) = channel();
|
|
for _ in 0..count {
|
|
tx.send(()).unwrap();
|
|
}
|
|
for _ in 0..count {
|
|
rx.recv().unwrap();
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn shared_recv_timeout() {
|
|
let (tx, rx) = channel();
|
|
let total = 5;
|
|
for _ in 0..total {
|
|
let tx = tx.clone();
|
|
thread::spawn(move || {
|
|
tx.send(()).unwrap();
|
|
});
|
|
}
|
|
|
|
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(()));
|
|
}
|
|
|
|
#[test]
|
|
fn shared_chan_stress() {
|
|
let (tx, rx) = channel();
|
|
let total = stress_factor() + 100;
|
|
for _ in 0..total {
|
|
let tx = tx.clone();
|
|
thread::spawn(move || {
|
|
tx.send(()).unwrap();
|
|
});
|
|
}
|
|
|
|
for _ in 0..total {
|
|
rx.recv().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);
|
|
}
|
|
|
|
#[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);
|
|
}
|
|
|
|
#[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));
|
|
}
|
|
|
|
// 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 t = tx.clone();
|
|
drop(tx);
|
|
t.send(()).unwrap();
|
|
|
|
// wait for the child thread to exit before we exit
|
|
rx2.recv().unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn issue_32114() {
|
|
let (tx, _) = channel();
|
|
let _ = tx.send(123);
|
|
assert_eq!(tx.send(123), Err(SendError(123)));
|
|
}
|
|
|
|
#[test]
|
|
fn issue_39364() {
|
|
let (tx, rx) = channel::<()>();
|
|
let t = thread::spawn(move || {
|
|
thread::sleep(Duration::from_millis(300));
|
|
let _ = tx.clone();
|
|
// Don't drop; hand back to caller.
|
|
tx
|
|
});
|
|
|
|
let _ = rx.recv_timeout(Duration::from_millis(500));
|
|
let _tx = t.join().unwrap(); // delay dropping until end of test
|
|
let _ = rx.recv_timeout(Duration::from_millis(500));
|
|
}
|