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    extern crate emergency_stop;

    use self::emergency_stop::EmergencyStop;

    use std::mem::transmute;
    use std::ptr::null_mut;
    use std::sync::atomic::Ordering;

    /// Constructs a new `EmergencyStop` on heap and returns pointer.
    #[no_mangle]
    pub extern "C" fn emergency_stop_init(stop: u8) -> *mut EmergencyStop {
        match EmergencyStop::new(stop) {
            Err(_) => null_mut(),
            Ok(emergency_stop) => unsafe { transmute(Box::new(emergency_stop)) },
        }
    }

    /// Drops a `EmergencyStop` pointer on heap.
    #[no_mangle]
    pub extern "C" fn emergency_stop_clean(emergency_stop: *mut EmergencyStop) {
        let _emergency_stop: Box<EmergencyStop> = unsafe { transmute(emergency_stop) };
    }

    /// Returns `EmergencyStop` pointer state.
    #[no_mangle]
    pub extern "C" fn emergency_stop_get_state(emergency_stop: *mut EmergencyStop) -> bool {
        let emergency_stop = unsafe { &mut *emergency_stop };

        emergency_stop.state.load(Ordering::Relaxed)
    }

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