rust/tests/run-pass-fullmir/threads.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);

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