rust/tests/run-pass/sync.rs

// Just instantiate some data structures to make sure we got all their foreign items covered.
// Requires full MIR on Windows.

use std::sync;

fn main() {
    let m = sync::Mutex::new(0);
    drop(m.lock());
    drop(m);

    #[cfg(not(target_os = "windows"))] // TODO: implement RwLock on Windows
    {
        let rw = sync::RwLock::new(0);
        drop(rw.read());
        drop(rw.write());
        drop(rw);
    }
}