Or, even better, you could just use a language that works well with concurrent programming without having to shoehorn in abstractions that break 2% of the time.

Or, even better, you could just use a language that works well with concurrent programming without having to shoehorn in abstractions that break 2% of the time. Go, Haskell, Erlang, take your pick; any of them will work correctly out of the box, even if some library does blocking FFI calls.