:: Ord a => [a] -> [a] -package:statistics -package:errors -is:exact -package:witherable -package:base -package:safe -is:exact -package:ghc package:lifted-base is:exact

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