Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 837 insertions, 0 deletions

diff --git a/vendor/flume/tests/ready.rs b/vendor/flume/tests/ready.rs
new file mode 100644
index 0000000..2f42d9a
--- /dev/null
+++ b/vendor/flume/tests/ready.rs
@@ -0,0 +1,837 @@
+// //! Tests for channel readiness using the `Select` struct.
+
+// extern crate crossbeam_channel;
+// extern crate crossbeam_utils;
+
+// use std::any::Any;
+// use std::cell::Cell;
+// use std::thread;
+// use std::time::{Duration, Instant};
+
+// use crossbeam_channel::{after, bounded, tick, unbounded};
+// use crossbeam_channel::{Receiver, Select, TryRecvError, TrySendError};
+// use crossbeam_utils::thread::scope;
+
+// fn ms(ms: u64) -> Duration {
+//     Duration::from_millis(ms)
+// }
+
+// #[test]
+// fn smoke1() {
+//     let (s1, r1) = unbounded::<usize>();
+//     let (s2, r2) = unbounded::<usize>();
+
+//     s1.send(1).unwrap();
+
+//     let mut sel = Select::new();
+//     sel.recv(&r1);
+//     sel.recv(&r2);
+//     assert_eq!(sel.ready(), 0);
+//     assert_eq!(r1.try_recv(), Ok(1));
+
+//     s2.send(2).unwrap();
+
+//     let mut sel = Select::new();
+//     sel.recv(&r1);
+//     sel.recv(&r2);
+//     assert_eq!(sel.ready(), 1);
+//     assert_eq!(r2.try_recv(), Ok(2));
+// }
+
+// #[test]
+// fn smoke2() {
+//     let (_s1, r1) = unbounded::<i32>();
+//     let (_s2, r2) = unbounded::<i32>();
+//     let (_s3, r3) = unbounded::<i32>();
+//     let (_s4, r4) = unbounded::<i32>();
+//     let (s5, r5) = unbounded::<i32>();
+
+//     s5.send(5).unwrap();
+
+//     let mut sel = Select::new();
+//     sel.recv(&r1);
+//     sel.recv(&r2);
+//     sel.recv(&r3);
+//     sel.recv(&r4);
+//     sel.recv(&r5);
+//     assert_eq!(sel.ready(), 4);
+//     assert_eq!(r5.try_recv(), Ok(5));
+// }
+
+// #[test]
+// fn disconnected() {
+//     let (s1, r1) = unbounded::<i32>();
+//     let (s2, r2) = unbounded::<i32>();
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             drop(s1);
+//             thread::sleep(ms(500));
+//             s2.send(5).unwrap();
+//         });
+
+//         let mut sel = Select::new();
+//         sel.recv(&r1);
+//         sel.recv(&r2);
+//         match sel.ready_timeout(ms(1000)) {
+//             Ok(0) => assert_eq!(r1.try_recv(), Err(TryRecvError::Disconnected)),
+//             _ => panic!(),
+//         }
+
+//         r2.recv().unwrap();
+//     })
+//     .unwrap();
+
+//     let mut sel = Select::new();
+//     sel.recv(&r1);
+//     sel.recv(&r2);
+//     match sel.ready_timeout(ms(1000)) {
+//         Ok(0) => assert_eq!(r1.try_recv(), Err(TryRecvError::Disconnected)),
+//         _ => panic!(),
+//     }
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             thread::sleep(ms(500));
+//             drop(s2);
+//         });
+
+//         let mut sel = Select::new();
+//         sel.recv(&r2);
+//         match sel.ready_timeout(ms(1000)) {
+//             Ok(0) => assert_eq!(r2.try_recv(), Err(TryRecvError::Disconnected)),
+//             _ => panic!(),
+//         }
+//     })
+//     .unwrap();
+// }
+
+// #[test]
+// fn default() {
+//     let (s1, r1) = unbounded::<i32>();
+//     let (s2, r2) = unbounded::<i32>();
+
+//     let mut sel = Select::new();
+//     sel.recv(&r1);
+//     sel.recv(&r2);
+//     assert!(sel.try_ready().is_err());
+
+//     drop(s1);
+
+//     let mut sel = Select::new();
+//     sel.recv(&r1);
+//     sel.recv(&r2);
+//     match sel.try_ready() {
+//         Ok(0) => assert!(r1.try_recv().is_err()),
+//         _ => panic!(),
+//     }
+
+//     s2.send(2).unwrap();
+
+//     let mut sel = Select::new();
+//     sel.recv(&r2);
+//     match sel.try_ready() {
+//         Ok(0) => assert_eq!(r2.try_recv(), Ok(2)),
+//         _ => panic!(),
+//     }
+
+//     let mut sel = Select::new();
+//     sel.recv(&r2);
+//     assert!(sel.try_ready().is_err());
+
+//     let mut sel = Select::new();
+//     assert!(sel.try_ready().is_err());
+// }
+
+// #[test]
+// fn timeout() {
+//     let (_s1, r1) = unbounded::<i32>();
+//     let (s2, r2) = unbounded::<i32>();
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             thread::sleep(ms(1500));
+//             s2.send(2).unwrap();
+//         });
+
+//         let mut sel = Select::new();
+//         sel.recv(&r1);
+//         sel.recv(&r2);
+//         assert!(sel.ready_timeout(ms(1000)).is_err());
+
+//         let mut sel = Select::new();
+//         sel.recv(&r1);
+//         sel.recv(&r2);
+//         match sel.ready_timeout(ms(1000)) {
+//             Ok(1) => assert_eq!(r2.try_recv(), Ok(2)),
+//             _ => panic!(),
+//         }
+//     })
+//     .unwrap();
+
+//     scope(|scope| {
+//         let (s, r) = unbounded::<i32>();
+
+//         scope.spawn(move |_| {
+//             thread::sleep(ms(500));
+//             drop(s);
+//         });
+
+//         let mut sel = Select::new();
+//         assert!(sel.ready_timeout(ms(1000)).is_err());
+
+//         let mut sel = Select::new();
+//         sel.recv(&r);
+//         match sel.try_ready() {
+//             Ok(0) => assert_eq!(r.try_recv(), Err(TryRecvError::Disconnected)),
+//             _ => panic!(),
+//         }
+//     })
+//     .unwrap();
+// }
+
+// #[test]
+// fn default_when_disconnected() {
+//     let (_, r) = unbounded::<i32>();
+
+//     let mut sel = Select::new();
+//     sel.recv(&r);
+//     match sel.try_ready() {
+//         Ok(0) => assert_eq!(r.try_recv(), Err(TryRecvError::Disconnected)),
+//         _ => panic!(),
+//     }
+
+//     let (_, r) = unbounded::<i32>();
+
+//     let mut sel = Select::new();
+//     sel.recv(&r);
+//     match sel.ready_timeout(ms(1000)) {
+//         Ok(0) => assert_eq!(r.try_recv(), Err(TryRecvError::Disconnected)),
+//         _ => panic!(),
+//     }
+
+//     let (s, _) = bounded::<i32>(0);
+
+//     let mut sel = Select::new();
+//     sel.send(&s);
+//     match sel.try_ready() {
+//         Ok(0) => assert_eq!(s.try_send(0), Err(TrySendError::Disconnected(0))),
+//         _ => panic!(),
+//     }
+
+//     let (s, _) = bounded::<i32>(0);
+
+//     let mut sel = Select::new();
+//     sel.send(&s);
+//     match sel.ready_timeout(ms(1000)) {
+//         Ok(0) => assert_eq!(s.try_send(0), Err(TrySendError::Disconnected(0))),
+//         _ => panic!(),
+//     }
+// }
+
+// #[test]
+// fn default_only() {
+//     let start = Instant::now();
+
+//     let mut sel = Select::new();
+//     assert!(sel.try_ready().is_err());
+//     let now = Instant::now();
+//     assert!(now - start <= ms(50));
+
+//     let start = Instant::now();
+//     let mut sel = Select::new();
+//     assert!(sel.ready_timeout(ms(500)).is_err());
+//     let now = Instant::now();
+//     assert!(now - start >= ms(450));
+//     assert!(now - start <= ms(550));
+// }
+
+// #[test]
+// fn unblocks() {
+//     let (s1, r1) = bounded::<i32>(0);
+//     let (s2, r2) = bounded::<i32>(0);
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             thread::sleep(ms(500));
+//             s2.send(2).unwrap();
+//         });
+
+//         let mut sel = Select::new();
+//         sel.recv(&r1);
+//         sel.recv(&r2);
+//         match sel.ready_timeout(ms(1000)) {
+//             Ok(1) => assert_eq!(r2.try_recv(), Ok(2)),
+//             _ => panic!(),
+//         }
+//     })
+//     .unwrap();
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             thread::sleep(ms(500));
+//             assert_eq!(r1.recv().unwrap(), 1);
+//         });
+
+//         let mut sel = Select::new();
+//         let oper1 = sel.send(&s1);
+//         let oper2 = sel.send(&s2);
+//         let oper = sel.select_timeout(ms(1000));
+//         match oper {
+//             Err(_) => panic!(),
+//             Ok(oper) => match oper.index() {
+//                 i if i == oper1 => oper.send(&s1, 1).unwrap(),
+//                 i if i == oper2 => panic!(),
+//                 _ => unreachable!(),
+//             },
+//         }
+//     })
+//     .unwrap();
+// }
+
+// #[test]
+// fn both_ready() {
+//     let (s1, r1) = bounded(0);
+//     let (s2, r2) = bounded(0);
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             thread::sleep(ms(500));
+//             s1.send(1).unwrap();
+//             assert_eq!(r2.recv().unwrap(), 2);
+//         });
+
+//         for _ in 0..2 {
+//             let mut sel = Select::new();
+//             sel.recv(&r1);
+//             sel.send(&s2);
+//             match sel.ready() {
+//                 0 => assert_eq!(r1.try_recv(), Ok(1)),
+//                 1 => s2.try_send(2).unwrap(),
+//                 _ => panic!(),
+//             }
+//         }
+//     })
+//     .unwrap();
+// }
+
+// #[test]
+// fn cloning1() {
+//     scope(|scope| {
+//         let (s1, r1) = unbounded::<i32>();
+//         let (_s2, r2) = unbounded::<i32>();
+//         let (s3, r3) = unbounded::<()>();
+
+//         scope.spawn(move |_| {
+//             r3.recv().unwrap();
+//             drop(s1.clone());
+//             assert!(r3.try_recv().is_err());
+//             s1.send(1).unwrap();
+//             r3.recv().unwrap();
+//         });
+
+//         s3.send(()).unwrap();
+
+//         let mut sel = Select::new();
+//         sel.recv(&r1);
+//         sel.recv(&r2);
+//         match sel.ready() {
+//             0 => drop(r1.try_recv()),
+//             1 => drop(r2.try_recv()),
+//             _ => panic!(),
+//         }
+
+//         s3.send(()).unwrap();
+//     })
+//     .unwrap();
+// }
+
+// #[test]
+// fn cloning2() {
+//     let (s1, r1) = unbounded::<()>();
+//     let (s2, r2) = unbounded::<()>();
+//     let (_s3, _r3) = unbounded::<()>();
+
+//     scope(|scope| {
+//         scope.spawn(move |_| {
+//             let mut sel = Select::new();
+//             sel.recv(&r1);
+//             sel.recv(&r2);
+//             match sel.ready() {
+//                 0 => panic!(),
+//                 1 => drop(r2.try_recv()),
+//                 _ => panic!(),
+//             }
+//         });
+
+//         thread::sleep(ms(500));
+//         drop(s1.clone());
+//         s2.send(()).unwrap();
+//     })
+//     .unwrap();
+// }
+
+// #[test]
+// fn preflight1() {
+//     let (s, r) = unbounded();
+//     s.send(()).unwrap();
+
+//     let mut sel = Select::new();
+//     sel.recv(&r);
+//     match sel.ready() {
+//         0 => drop(r.try_recv()),
+//         _ => panic!(),
+//     }
+// }
+
+// #[test]
+// fn preflight2() {
+//     let (s, r) = unbounded();
+//     drop(s.clone());
+//     s.send(()).unwrap();
+//     drop(s);
+
+//     let mut sel = Select::new();
+//     sel.recv(&r);
+//     match sel.ready() {
+//         0 => assert_eq!(r.try_recv(), Ok(())),
+//         _ => panic!(),
+//     }
+
+//     assert_eq!(r.try_recv(), Err(TryRecvError::Disconnected));
+// }
+
+// #[test]
+// fn preflight3() {
+//     let (s, r) = unbounded();
+//     drop(s.clone());
+//     s.send(()).unwrap();
+//     drop(s);
+//     r.recv().unwrap();
+
+//     let mut sel = Select::new();
+//     sel.recv(&r);
+//     match sel.ready() {
+//         0 => assert_eq!(r.try_recv(), Err(TryRecvError::Disconnected)),
+//         _ => panic!(),
+//     }
+// }
+
+// #[test]
+// fn duplicate_operations() {
+//     let (s, r) = unbounded::<i32>();
+//     let hit = vec![Cell::new(false); 4];
+
+//     while hit.iter().map(|h| h.get()).any(|hit| !hit) {
+//         let mut sel = Select::new();
+//         sel.recv(&r);
+//         sel.recv(&r);
+//         sel.send(&s);
+//         sel.send(&s);
+//         match sel.ready() {
+//             0 => {
+//                 assert!(r.try_recv().is_ok());
+//                 hit[0].set(true);
+//             }
+//             1 => {
+//                 assert!(r.try_recv().is_ok());
+//                 hit[1].set(true);
+//             }
+//             2 => {
+//                 assert!(s.try_send(0).is_ok());
+//                 hit[2].set(true);
+//             }
+//             3 => {
+//                 assert!(s.try_send(0).is_ok());
+//                 hit[3].set(true);
+//             }
+//             _ => panic!(),
+//         }
+//     }
+// }
+
+// #[test]
+// fn nesting() {
+//     let (s, r) = unbounded::<i32>();
+
+//     let mut sel = Select::new();
+//     sel.send(&s);
+//     match sel.ready() {
+//         0 => {
+//             assert!(s.try_send(0).is_ok());
+
+//             let mut sel = Select::new();
+//             sel.recv(&r);
+//             match sel.ready() {
+//                 0 => {
+//                     assert_eq!(r.try_recv(), Ok(0));
+
+//                     let mut sel = Select::new();
+//                     sel.send(&s);
+//                     match sel.ready() {
+//                         0 => {
+//                             assert!(s.try_send(1).is_ok());
+
+//                             let mut sel = Select::new();
+//                             sel.recv(&r);
+//                             match sel.ready() {
+//                                 0 => {
+//                                     assert_eq!(r.try_recv(), Ok(1));
+//                                 }
+//                                 _ => panic!(),
+//                             }
+//                         }
+//                         _ => panic!(),
+//                     }
+//                 }
+//                 _ => panic!(),
+//             }
+//         }
+//         _ => panic!(),
+//     }
+// }
+
+// #[test]
+// fn stress_recv() {
+//     const COUNT: usize = 10_000;
+
+//     let (s1, r1) = unbounded();
+//     let (s2, r2) = bounded(5);
+//     let (s3, r3) = bounded(0);
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             for i in 0..COUNT {
+//                 s1.send(i).unwrap();
+//                 r3.recv().unwrap();
+
+//                 s2.send(i).unwrap();
+//                 r3.recv().unwrap();
+//             }
+//         });
+
+//         for i in 0..COUNT {
+//             for _ in 0..2 {
+//                 let mut sel = Select::new();
+//                 sel.recv(&r1);
+//                 sel.recv(&r2);
+//                 match sel.ready() {
+//                     0 => assert_eq!(r1.try_recv(), Ok(i)),
+//                     1 => assert_eq!(r2.try_recv(), Ok(i)),
+//                     _ => panic!(),
+//                 }
+
+//                 s3.send(()).unwrap();
+//             }
+//         }
+//     })
+//     .unwrap();
+// }
+
+// #[test]
+// fn stress_send() {
+//     const COUNT: usize = 10_000;
+
+//     let (s1, r1) = bounded(0);
+//     let (s2, r2) = bounded(0);
+//     let (s3, r3) = bounded(100);
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             for i in 0..COUNT {
+//                 assert_eq!(r1.recv().unwrap(), i);
+//                 assert_eq!(r2.recv().unwrap(), i);
+//                 r3.recv().unwrap();
+//             }
+//         });
+
+//         for i in 0..COUNT {
+//             for _ in 0..2 {
+//                 let mut sel = Select::new();
+//                 sel.send(&s1);
+//                 sel.send(&s2);
+//                 match sel.ready() {
+//                     0 => assert!(s1.try_send(i).is_ok()),
+//                     1 => assert!(s2.try_send(i).is_ok()),
+//                     _ => panic!(),
+//                 }
+//             }
+//             s3.send(()).unwrap();
+//         }
+//     })
+//     .unwrap();
+// }
+
+// #[test]
+// fn stress_mixed() {
+//     const COUNT: usize = 10_000;
+
+//     let (s1, r1) = bounded(0);
+//     let (s2, r2) = bounded(0);
+//     let (s3, r3) = bounded(100);
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             for i in 0..COUNT {
+//                 s1.send(i).unwrap();
+//                 assert_eq!(r2.recv().unwrap(), i);
+//                 r3.recv().unwrap();
+//             }
+//         });
+
+//         for i in 0..COUNT {
+//             for _ in 0..2 {
+//                 let mut sel = Select::new();
+//                 sel.recv(&r1);
+//                 sel.send(&s2);
+//                 match sel.ready() {
+//                     0 => assert_eq!(r1.try_recv(), Ok(i)),
+//                     1 => assert!(s2.try_send(i).is_ok()),
+//                     _ => panic!(),
+//                 }
+//             }
+//             s3.send(()).unwrap();
+//         }
+//     })
+//     .unwrap();
+// }
+
+// #[test]
+// fn stress_timeout_two_threads() {
+//     const COUNT: usize = 20;
+
+//     let (s, r) = bounded(2);
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             for i in 0..COUNT {
+//                 if i % 2 == 0 {
+//                     thread::sleep(ms(500));
+//                 }
+
+//                 let done = false;
+//                 while !done {
+//                     let mut sel = Select::new();
+//                     sel.send(&s);
+//                     match sel.ready_timeout(ms(100)) {
+//                         Err(_) => {}
+//                         Ok(0) => {
+//                             assert!(s.try_send(i).is_ok());
+//                             break;
+//                         }
+//                         Ok(_) => panic!(),
+//                     }
+//                 }
+//             }
+//         });
+
+//         scope.spawn(|_| {
+//             for i in 0..COUNT {
+//                 if i % 2 == 0 {
+//                     thread::sleep(ms(500));
+//                 }
+
+//                 let mut done = false;
+//                 while !done {
+//                     let mut sel = Select::new();
+//                     sel.recv(&r);
+//                     match sel.ready_timeout(ms(100)) {
+//                         Err(_) => {}
+//                         Ok(0) => {
+//                             assert_eq!(r.try_recv(), Ok(i));
+//                             done = true;
+//                         }
+//                         Ok(_) => panic!(),
+//                     }
+//                 }
+//             }
+//         });
+//     })
+//     .unwrap();
+// }
+
+// #[test]
+// fn send_recv_same_channel() {
+//     let (s, r) = bounded::<i32>(0);
+//     let mut sel = Select::new();
+//     sel.send(&s);
+//     sel.recv(&r);
+//     assert!(sel.ready_timeout(ms(100)).is_err());
+
+//     let (s, r) = unbounded::<i32>();
+//     let mut sel = Select::new();
+//     sel.send(&s);
+//     sel.recv(&r);
+//     match sel.ready_timeout(ms(100)) {
+//         Err(_) => panic!(),
+//         Ok(0) => assert!(s.try_send(0).is_ok()),
+//         Ok(_) => panic!(),
+//     }
+// }
+
+// #[test]
+// fn channel_through_channel() {
+//     const COUNT: usize = 1000;
+
+//     type T = Box<dyn Any + Send>;
+
+//     for cap in 1..4 {
+//         let (s, r) = bounded::<T>(cap);
+
+//         scope(|scope| {
+//             scope.spawn(move |_| {
+//                 let mut s = s;
+
+//                 for _ in 0..COUNT {
+//                     let (new_s, new_r) = bounded(cap);
+//                     let new_r: T = Box::new(Some(new_r));
+
+//                     {
+//                         let mut sel = Select::new();
+//                         sel.send(&s);
+//                         match sel.ready() {
+//                             0 => assert!(s.try_send(new_r).is_ok()),
+//                             _ => panic!(),
+//                         }
+//                     }
+
+//                     s = new_s;
+//                 }
+//             });
+
+//             scope.spawn(move |_| {
+//                 let mut r = r;
+
+//                 for _ in 0..COUNT {
+//                     let new = {
+//                         let mut sel = Select::new();
+//                         sel.recv(&r);
+//                         match sel.ready() {
+//                             0 => r
+//                                 .try_recv()
+//                                 .unwrap()
+//                                 .downcast_mut::<Option<Receiver<T>>>()
+//                                 .unwrap()
+//                                 .take()
+//                                 .unwrap(),
+//                             _ => panic!(),
+//                         }
+//                     };
+//                     r = new;
+//                 }
+//             });
+//         })
+//         .unwrap();
+//     }
+// }
+
+// #[test]
+// fn fairness1() {
+//     const COUNT: usize = 10_000;
+
+//     let (s1, r1) = bounded::<()>(COUNT);
+//     let (s2, r2) = unbounded::<()>();
+
+//     for _ in 0..COUNT {
+//         s1.send(()).unwrap();
+//         s2.send(()).unwrap();
+//     }
+
+//     let hits = vec![Cell::new(0usize); 4];
+//     for _ in 0..COUNT {
+//         let after = after(ms(0));
+//         let tick = tick(ms(0));
+
+//         let mut sel = Select::new();
+//         sel.recv(&r1);
+//         sel.recv(&r2);
+//         sel.recv(&after);
+//         sel.recv(&tick);
+//         match sel.ready() {
+//             0 => {
+//                 r1.try_recv().unwrap();
+//                 hits[0].set(hits[0].get() + 1);
+//             }
+//             1 => {
+//                 r2.try_recv().unwrap();
+//                 hits[1].set(hits[1].get() + 1);
+//             }
+//             2 => {
+//                 after.try_recv().unwrap();
+//                 hits[2].set(hits[2].get() + 1);
+//             }
+//             3 => {
+//                 tick.try_recv().unwrap();
+//                 hits[3].set(hits[3].get() + 1);
+//             }
+//             _ => panic!(),
+//         }
+//     }
+//     assert!(hits.iter().all(|x| x.get() >= COUNT / hits.len() / 2));
+// }
+
+// #[test]
+// fn fairness2() {
+//     const COUNT: usize = 10_000;
+
+//     let (s1, r1) = unbounded::<()>();
+//     let (s2, r2) = bounded::<()>(1);
+//     let (s3, r3) = bounded::<()>(0);
+
+//     scope(|scope| {
+//         scope.spawn(|_| {
+//             for _ in 0..COUNT {
+//                 let mut sel = Select::new();
+//                 let mut oper1 = None;
+//                 let mut oper2 = None;
+//                 if s1.is_empty() {
+//                     oper1 = Some(sel.send(&s1));
+//                 }
+//                 if s2.is_empty() {
+//                     oper2 = Some(sel.send(&s2));
+//                 }
+//                 let oper3 = sel.send(&s3);
+//                 let oper = sel.select();
+//                 match oper.index() {
+//                     i if Some(i) == oper1 => assert!(oper.send(&s1, ()).is_ok()),
+//                     i if Some(i) == oper2 => assert!(oper.send(&s2, ()).is_ok()),
+//                     i if i == oper3 => assert!(oper.send(&s3, ()).is_ok()),
+//                     _ => unreachable!(),
+//                 }
+//             }
+//         });
+
+//         let hits = vec![Cell::new(0usize); 3];
+//         for _ in 0..COUNT {
+//             let mut sel = Select::new();
+//             sel.recv(&r1);
+//             sel.recv(&r2);
+//             sel.recv(&r3);
+//             loop {
+//                 match sel.ready() {
+//                     0 => {
+//                         if r1.try_recv().is_ok() {
+//                             hits[0].set(hits[0].get() + 1);
+//                             break;
+//                         }
+//                     }
+//                     1 => {
+//                         if r2.try_recv().is_ok() {
+//                             hits[1].set(hits[1].get() + 1);
+//                             break;
+//                         }
+//                     }
+//                     2 => {
+//                         if r3.try_recv().is_ok() {
+//                             hits[2].set(hits[2].get() + 1);
+//                             break;
+//                         }
+//                     }
+//                     _ => unreachable!(),
+//                 }
+//             }
+//         }
+//         assert!(hits.iter().all(|x| x.get() >= COUNT / hits.len() / 10));
+//     })
+//     .unwrap();
+// }