Control.Concurrent.Classy.STM.TMVar
TMVar
data TMVar stm a
newTMVar
newTMVarN
newEmptyTMVar
newEmptyTMVarN
takeTMVar
putTMVar
readTMVar
tryTakeTMVar
tryPutTMVar
tryReadTMVar
isEmptyTMVar
swapTMVar