Tracking Issue for `arc_raw_get_strong`

Feature gate: #![feature(arc_raw_get_strong)]

This is a tracking issue for adding strong_count_from_raw to Arc and Rc for getting their strong count from a raw pointer.

Public API

impl<T: ?Sized, A: Allocator> Arc<T, A> {
    pub unsafe fn strong_count_from_raw(ptr: *const T) -> usize {
        ...
    }
}

impl<T: ?Sized, A: Allocator> Rc<T, A> {
    pub unsafe fn strong_count_from_raw(ptr: *const T) -> usize {
        ...
    }
}

Steps / History

(Remember to update the S-tracking-* label when checking boxes.)

• ACP: rust-lang/libs-team#792
• Implementation: #...
• Final comment period (FCP)^1
• Stabilization PR

Unresolved Questions

• None yet.

Start by reviewing the proposed public API for Arc and Rc and the linked ACP, rust-lang/libs-team#792. The issue does not name implementation files or tests; completion requires the implementation, final comment period, and stabilization PR steps to be addressed.