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

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