Vendor dependencies for 0.3.0 release

vendor/crossbeam-utils/tests/parker.rs

@@ -0,0 +1,41 @@
+use std::thread::sleep;
+use std::time::Duration;
+use std::u32;
+
+use crossbeam_utils::sync::Parker;
+use crossbeam_utils::thread;
+
+#[test]
+fn park_timeout_unpark_before() {
+    let p = Parker::new();
+    for _ in 0..10 {
+        p.unparker().unpark();
+        p.park_timeout(Duration::from_millis(u32::MAX as u64));
+    }
+}
+
+#[test]
+fn park_timeout_unpark_not_called() {
+    let p = Parker::new();
+    for _ in 0..10 {
+        p.park_timeout(Duration::from_millis(10))
+    }
+}
+
+#[test]
+fn park_timeout_unpark_called_other_thread() {
+    for _ in 0..10 {
+        let p = Parker::new();
+        let u = p.unparker().clone();
+
+        thread::scope(|scope| {
+            scope.spawn(move |_| {
+                sleep(Duration::from_millis(50));
+                u.unpark();
+            });
+
+            p.park_timeout(Duration::from_millis(u32::MAX as u64))
+        })
+        .unwrap();
+    }
+}