+// ignore-windows: Concurrency on Windows is not supported yet.
use std::thread::spawn;
+// ignore-windows: Concurrency on Windows is not supported yet.
use std::thread::spawn;
use std::sync::atomic::{AtomicUsize, Ordering};
+// ignore-windows: Concurrency on Windows is not supported yet.
// compile-flags: -Zmiri-disable-isolation
use std::thread::{spawn, sleep};
+// ignore-windows: Concurrency on Windows is not supported yet.
use std::thread::spawn;
use std::sync::atomic::{AtomicUsize, Ordering};
+// ignore-windows: Concurrency on Windows is not supported yet.
use std::thread::spawn;
+// ignore-windows: Concurrency on Windows is not supported yet.
+
+
use std::sync::atomic::{AtomicUsize, fence, Ordering};
use std::thread::spawn;