use std::cell::{Ref, RefCell, RefMut};
use std::rc::Rc;

#[derive(Clone)]
struct Servizio {
    inner: Rc<RefCell<ServizioInner>>,
}

struct ServizioInner {
    x: u32,
}

impl Servizio {
    fn new() -> Self {
        Self {
            inner: Rc::new(RefCell::new(ServizioInner { x: 0 })),
        }
    }
    fn state(&self) -> Ref<ServizioInner> {
        self.inner.borrow()
    }
    fn state_mut(&self) -> RefMut<ServizioInner> {
        self.inner.borrow_mut()
    }

    fn inc_x(&self) {
        let mut s = self.state_mut();
        s.x += 1;
    }

    fn get_x(&self) -> u32 {
        let s = self.state();
        s.x
    }
}

fn main() {
    let servizio = Servizio::new();
    let servizio2 = servizio.clone();
    servizio.inc_x();
    println!("{}", servizio2.get_x());
}