MSP430 Sample Atomic Impl

lib.rs

#![no_std]
#![feature(const_fn)]
#![feature(asm)]

use core::cell::UnsafeCell;


pub struct MspAtomicBool {
    data: UnsafeCell<u8>,
}

impl MspAtomicBool {
    pub const fn new(v: bool) -> MspAtomicBool {
        MspAtomicBool { data: UnsafeCell::new(v) }
    }

    pub fn store(&self, v: bool) -> () {
        let my_bool_ptr = self.data.get();
        let bool_as_int = if v {
            1
        } else {
            0
        };
        unsafe {
            asm!("mov $0, $1" : : "r"(v), "m"(my_bool_ptr) : "memory" :);
        }
    }

    pub fn load(&self) -> bool {
        let v: u8;
        let my_bool_ptr = self.data.get();
        unsafe {
            asm!("mov $1, $0" : "=r"(v): "m"(my_bool_ptr) : "memory" :);
        }

        if v == 0 {
            false
        } else {
            true
        }
    }
}

unsafe impl Sync for MspAtomicBool {}

#[cfg(test)]
mod tests {

    #[test]
    fn it_works() {
    }
}