:: Ord a => [a] -> [a] -package:containers -is:exact -package:witherable -package:mono-traversable -package:safe -package:basement -package:hedgehog is:exact package:lifted-base

Generalized version of runInBoundThread.
Generalized version of runInUnboundThread.
Generalized version of mask_.
Generalized version of uninterruptibleMask_.