:: Ord a => [a] -> [a] -package:witherable -package:extra -package:ghc is:exact -package:safe -package:basement -package:hxt -package:vector -package:errors package:lifted-base

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