:: Ord a => [a] -> [a] -package:statistics -package:errors -package:extra -package:imports -package:witherable -package:safe -package:containers -package:hedgehog package:lifted-base is:exact

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