Function scope_two

src/scope.rs:1024–1042

()

    /// `this` must be a pointer produced by `Arc::into_raw` on an `Arc<Self>`.
    ///
    /// This call takes ownership of exactly one strong reference count for that
    /// allocation, releasing it via `Arc::decrement_strong_count` internally.
    /// The caller must hold "ownership" of one such strong reference.
    unsafe fn drop_as_waker(this: *const ()) {
        // Rather than converting back into an arc, we can just decrement the
        // counter here.
        //
        // SAFETY: `this` came from `Arc::into_raw` and the caller transfers
        // ownership of one strong count (per the contract), so decrementing it
        // is sound.
        unsafe { Arc::decrement_strong_count(this.cast::<Self>()) };
    }
}

// -----------------------------------------------------------------------------
// Scope pointer

mod scope_ptr {
    //! Defines a "lifetime-erased" reference-counting pointer to a scope.

    use alloc::boxed::Box;
    use core::any::Any;