From version 0.2 of xpsupport, there no longer need this crate.
I just use this repo to test libstd/sync for xpsupport (latest: 2019 Nov 1).
Build with command: cargo test.
test result: ok. 148 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Only mpsc::stress_recv_timeout_shared seems deadlock, other 148 are all passed!
You may consider parking_lot crate as the sync library or spin, they both support XP.