Events.Toggle

A toggle is a switch initially True, which can only be made false (when some action is performed, say). This module implements toggles, allowing atomic switching to false of 1 toggle, or 2 toggles together. To avoid deadlock we use a supply of unique integers.

Documentation

data Toggle

newToggle :: IO Toggle

toggle1 :: Toggle -> IO Bool

toggle2 :: Toggle -> Toggle -> IO (Maybe (Bool, Bool))

ifToggle :: Toggle -> IO () -> IO ()

peekToggle :: Toggle -> IO Bool

data SimpleToggle

newSimpleToggle :: IO SimpleToggle

simpleToggle :: SimpleToggle -> IO Bool

ifSimpleToggle :: SimpleToggle -> IO () -> IO ()