Visic

use core::cell::UnsafeCell;
use core::marker::PhantomData;
use core::ops::{Deref, DerefMut};
use core::ptr::NonNull;
use core::sync::atomic::{spin_loop_hint as cpu_relax, AtomicUsize, Ordering};

pub struct RwLock<T: ?Sized> {
    lock: AtomicUsize,
    data: UnsafeCell<T>,
}