No. nextaccountic's comment and the cuongle.dev article are both talking about Rust. The Rust `parking_lot` implementation only uses two bits within a byte, but it doesn't provide a way for anything else to use the remaining six.

pizlonator's comments mention both the (C++) WTF::ParkingLot and the Rust `parking_lot`, and they don't answer nextaccountic's question about the latter.

> nextaccountic is confused.

nextaccountic asked how this idea could be applied to this Rust implementation. That's a perfectly reasonable question. pizlonator didn't know the anwer. That's perfectly reasonable too. Conscat suggested the article would be helpful; that was wrong.