Function scope_lock::lock_scope

source ยท 
pub fn lock_scope<'env, F, T>(scope: F)
where
    F: for<'scope> FnOnce(&'scope Extender<'scope, 'env>) -> T,
Examples found in repository?
examples/references.rs (lines 19-29)
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fn main() {
    let mut a = vec![1, 2, 3];
    let mut x = 0;

    let f1 = &|()| {
        println!("hello from the first scoped thread");
        // We can borrow `a` here.
        dbg!(&a);
    };
    let f2 = &mut |()| {
        println!("hello from the second scoped thread");
        // We can even mutably borrow `x` here,
        // because no other threads are using it.
        x += a[0] + a[2];
    };

    scope_lock::lock_scope(|e| {
        thread::spawn({
            let f = e.extend_fn(f1);
            move || f.call(())
        });
        thread::spawn({
            let mut f = e.extend_fn_mut(f2);
            move || f.call(())
        });
        println!("hello from the main thread");
    });

    // After the scope, we can modify and access our variables again:
    a.push(4);
    assert_eq!(x, a.len());
}
More examples
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examples/boxed.rs (lines 7-26)
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fn main() {
    let mut a = vec![1, 2, 3];
    let mut x = 0;

    scope_lock::lock_scope(|e| {
        thread::spawn({
            let f = e.extend_fn_once_box(|()| {
                println!("hello from the first scoped thread");
                // We can borrow `a` here.
                dbg!(&a);
            });
            move || f(())
        });
        thread::spawn({
            let f = e.extend_fn_once_box(|()| {
                println!("hello from the second scoped thread");
                // We can even mutably borrow `x` here,
                // because no other threads are using it.
                x += a[0] + a[2];
            });
            move || f(())
        });
        println!("hello from the main thread");
    });

    // After the scope, we can modify and access our variables again:
    a.push(4);
    assert_eq!(x, a.len());
}