Interface RefCountable

rust/src/rc.rs:38–41

RefCountable provides an abstraction over the various core-allocated refcounted resources. It is important that consumers don't acquire ownership of a `RefCountable` object directly -- they should only ever get their hands on a `Ref ` or `&T`, otherwise it would be possible for the allocation in the core to be trivially leaked, as `T` does not have the `Drop` impl `T` does not have the `Drop`

// efficient handling of core owned objects we receive pointers
// to in callbacks
pub(crate) unsafe trait RefCountable: ToOwned<Owned = Ref<Self>> + Sized {
    unsafe fn inc_ref(handle: &Self) -> Ref<Self>;
    unsafe fn dec_ref(handle: &Self);
}

// Represents an 'owned' reference tracked by the core
// that we are responsible for cleaning up once we're