Function scope_empty

src/scope.rs:998–1005

()

    /// a count.
    unsafe fn wake_by_ref(this: *const ()) {
        // We use manually drop here to prevent us from consuming the arc on
        // drop. This functions like an `&Arc<Self>` rather than an `Arc<Self>`.
        //
        // SAFETY: `this` came from `Arc::into_raw` and the caller keeps a strong
        // reference alive (per the contract). Wrapping in `ManuallyDrop` borrows
        // that count rather than consuming it.
        let this =
            unsafe { ManuallyDrop::new(Arc::from_raw(this.cast::<Self>())) };

        // As in `wake`, this publishes no data of its own; it only needs the
        // READY -> WOKEN transition to be atomic. Hence, again, the `Relaxed`