Vendor things

third-party/vendor/crossbeam-utils/tests/thread.rs

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+use std::any::Any;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::thread::sleep;
+use std::time::Duration;
+
+use crossbeam_utils::thread;
+
+const THREADS: usize = 10;
+const SMALL_STACK_SIZE: usize = 20;
+
+#[test]
+fn join() {
+    let counter = AtomicUsize::new(0);
+    thread::scope(|scope| {
+        let handle = scope.spawn(|_| {
+            counter.store(1, Ordering::Relaxed);
+        });
+        assert!(handle.join().is_ok());
+
+        let panic_handle = scope.spawn(|_| {
+            panic!("\"My honey is running out!\", said Pooh.");
+        });
+        assert!(panic_handle.join().is_err());
+    })
+    .unwrap();
+
+    // There should be sufficient synchronization.
+    assert_eq!(1, counter.load(Ordering::Relaxed));
+}
+
+#[test]
+fn counter() {
+    let counter = AtomicUsize::new(0);
+    thread::scope(|scope| {
+        for _ in 0..THREADS {
+            scope.spawn(|_| {
+                counter.fetch_add(1, Ordering::Relaxed);
+            });
+        }
+    })
+    .unwrap();
+
+    assert_eq!(THREADS, counter.load(Ordering::Relaxed));
+}
+
+#[test]
+fn counter_builder() {
+    let counter = AtomicUsize::new(0);
+    thread::scope(|scope| {
+        for i in 0..THREADS {
+            scope
+                .builder()
+                .name(format!("child-{}", i))
+                .stack_size(SMALL_STACK_SIZE)
+                .spawn(|_| {
+                    counter.fetch_add(1, Ordering::Relaxed);
+                })
+                .unwrap();
+        }
+    })
+    .unwrap();
+
+    assert_eq!(THREADS, counter.load(Ordering::Relaxed));
+}
+
+#[test]
+fn counter_panic() {
+    let counter = AtomicUsize::new(0);
+    let result = thread::scope(|scope| {
+        scope.spawn(|_| {
+            panic!("\"My honey is running out!\", said Pooh.");
+        });
+        sleep(Duration::from_millis(100));
+
+        for _ in 0..THREADS {
+            scope.spawn(|_| {
+                counter.fetch_add(1, Ordering::Relaxed);
+            });
+        }
+    });
+
+    assert_eq!(THREADS, counter.load(Ordering::Relaxed));
+    assert!(result.is_err());
+}
+
+#[test]
+fn panic_twice() {
+    let result = thread::scope(|scope| {
+        scope.spawn(|_| {
+            sleep(Duration::from_millis(500));
+            panic!("thread #1");
+        });
+        scope.spawn(|_| {
+            panic!("thread #2");
+        });
+    });
+
+    let err = result.unwrap_err();
+    let vec = err
+        .downcast_ref::<Vec<Box<dyn Any + Send + 'static>>>()
+        .unwrap();
+    assert_eq!(2, vec.len());
+
+    let first = vec[0].downcast_ref::<&str>().unwrap();
+    let second = vec[1].downcast_ref::<&str>().unwrap();
+    assert_eq!("thread #1", *first);
+    assert_eq!("thread #2", *second)
+}
+
+#[test]
+fn panic_many() {
+    let result = thread::scope(|scope| {
+        scope.spawn(|_| panic!("deliberate panic #1"));
+        scope.spawn(|_| panic!("deliberate panic #2"));
+        scope.spawn(|_| panic!("deliberate panic #3"));
+    });
+
+    let err = result.unwrap_err();
+    let vec = err
+        .downcast_ref::<Vec<Box<dyn Any + Send + 'static>>>()
+        .unwrap();
+    assert_eq!(3, vec.len());
+
+    for panic in vec.iter() {
+        let panic = panic.downcast_ref::<&str>().unwrap();
+        assert!(
+            *panic == "deliberate panic #1"
+                || *panic == "deliberate panic #2"
+                || *panic == "deliberate panic #3"
+        );
+    }
+}
+
+#[test]
+fn nesting() {
+    let var = "foo".to_string();
+
+    struct Wrapper<'a> {
+        var: &'a String,
+    }
+
+    impl<'a> Wrapper<'a> {
+        fn recurse(&'a self, scope: &thread::Scope<'a>, depth: usize) {
+            assert_eq!(self.var, "foo");
+
+            if depth > 0 {
+                scope.spawn(move |scope| {
+                    self.recurse(scope, depth - 1);
+                });
+            }
+        }
+    }
+
+    let wrapper = Wrapper { var: &var };
+
+    thread::scope(|scope| {
+        scope.spawn(|scope| {
+            scope.spawn(|scope| {
+                wrapper.recurse(scope, 5);
+            });
+        });
+    })
+    .unwrap();
+}
+
+#[test]
+fn join_nested() {
+    thread::scope(|scope| {
+        scope.spawn(|scope| {
+            let handle = scope.spawn(|_| 7);
+
+            sleep(Duration::from_millis(200));
+            handle.join().unwrap();
+        });
+
+        sleep(Duration::from_millis(100));
+    })
+    .unwrap();
+}
+
+#[test]
+fn scope_returns_ok() {
+    let result = thread::scope(|scope| scope.spawn(|_| 1234).join().unwrap()).unwrap();
+    assert_eq!(result, 1234);
+}
+
+#[cfg(unix)]
+#[test]
+fn as_pthread_t() {
+    use std::os::unix::thread::JoinHandleExt;
+    thread::scope(|scope| {
+        let handle = scope.spawn(|_scope| {
+            sleep(Duration::from_millis(100));
+            42
+        });
+        let _pthread_t = handle.as_pthread_t();
+        handle.join().unwrap();
+    })
+    .unwrap();
+}
+
+#[cfg(windows)]
+#[test]
+fn as_raw_handle() {
+    use std::os::windows::io::AsRawHandle;
+    thread::scope(|scope| {
+        let handle = scope.spawn(|_scope| {
+            sleep(Duration::from_millis(100));
+            42
+        });
+        let _raw_handle = handle.as_raw_handle();
+        handle.join().unwrap();
+    })
+    .unwrap();
+}