shared_mut_closure.rs

use std::sync::{Arc, Mutex};

#[derive(Clone)]
struct Obj {
    pub c: u32,
}

fn main() {
    let obj = Arc::new(Mutex::new(Obj{c:0}));

    let local = obj.clone();
    let mut test = move || {
        let mut o = local.lock().unwrap();
        o.c += 1;
        println!("{}", o.c);
    };

    obj.lock().unwrap().c = 12;
    test();
}