| // Copyright 2016 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| #![allow(stable_features)] |
| #![feature(volatile)] |
| use std::ptr::{read_volatile, write_volatile}; |
| |
| fn main() { |
| let mut x: &'static str = "test"; |
| unsafe { |
| let a = read_volatile(&x); |
| assert_eq!(a, "test"); |
| write_volatile(&mut x, "foo"); |
| assert_eq!(x, "foo"); |
| } |
| } |
