[PATCH 2/3] rust: maple_tree: add MapleTree::lock() and load()

[Boqun Feng]

On Sat, Jul 26, 2025 at 01:23:23PM +0000, Alice Ryhl wrote:
[...]
> +/// A reference to a [`MapleTree`] that owns the inner lock.
> +///
> +/// # Invariants
> +///
> +/// This guard owns the inner spinlock.
> +pub struct MapleLock<'tree, T: ForeignOwnable>(&'tree MapleTree<T>);

So it's a guard, how about we name it `MapleGuard`, or `MapleLockGuard`,
or just `Guard`?

Regards,
Boqun

> +
> +impl<'tree, T: ForeignOwnable> Drop for MapleLock<'tree, T> {
> +    #[inline]
> +    fn drop(&mut self) {
> +        // SAFETY: By the type invariants, we hold this spinlock.
> +        unsafe { bindings::spin_unlock(self.0.ma_lock()) };
> +    }
> +}
> +
[...]