Control.Concurrent.WVar
data WVar a
newWVar
takeWVar
tryTakeWVar
putWVar
readWVar
readFreshWVar
tryReadFreshWVar
data WCached a
type WTicket a
cacheWVar
recacheWCached
readWTicket
takeWCached
tryTakeWCached
putWCached
tryPutWCached
readWCached
readFreshWCached
tryReadFreshWCached