unsafe.rs

extern crate crossbeam;
extern crate fringe;
use fringe::generator::*;
use fringe::OsStack;
use std::ptr;
use std::thread;

fn do_stuff(x: &mut i32) {
    loop {
        unsafe {
            ptr::write_volatile(x, 1);
        }
    }
}

fn gen(yielder: &mut Yielder<(), ()>, input: ()) {
    let mut var = 0;
    crossbeam::scope(|scope| {
        scope.spawn(|| do_stuff(&mut var));
        thread::sleep_ms(100);
        yielder.suspend(());
    });
}

fn main() {
    let stack = OsStack::new(1<<16).unwrap();
    let mut g = Generator::new(stack, gen);
    g.resume(());
    drop(g);
    thread::sleep_ms(1000);
    // Drop g here while another thread is still accessing var
}