happstack-util-0.3.1: Web framework Source code Contents Index

Happstack.Util.Concurrent

Synopsis

forkEverSt :: (t -> IO t) -> t -> IO ThreadId foreverSt :: Monad m => (t -> m t) -> t -> m b forkEver :: IO a -> IO ThreadId writeChanRight :: Chan (Either a b) -> b -> IO () writeChanLeft :: Chan (Either a b) -> a -> IO () fork_ :: IO a -> IO () fork :: IO a -> IO ThreadId registerResetAction :: IO () -> IO () reset :: IO () forever :: IO a -> IO a sleep :: Int -> IO ()

Documentation

forkEverSt :: (t -> IO t) -> t -> IO ThreadId Source

Equivalent to a composition of fork and foreverSt

foreverSt :: Monad m => (t -> m t) -> t -> m b Source

Similar to forever but with an explicit state parameter threaded through the computation.

forkEver :: IO a -> IO ThreadId Source

Equivalent to a composition of fork and forever

writeChanRight :: Chan (Either a b) -> b -> IO () Source

Lifts the argument with Right before writing it into the chan

writeChanLeft :: Chan (Either a b) -> a -> IO () Source

Lifts the argument with Left before writing it into the chan

fork_ :: IO a -> IO () Source

Fork that throws away the ThreadId

fork :: IO a -> IO ThreadId Source

Fork a new thread.

registerResetAction :: IO () -> IO () Source

Register an action to be run when ghci is restarted.

reset :: IO () Source

Reset state

forever :: IO a -> IO a Source

A version of forever that will gracefully catch IO exceptions and continue executing the provided action.

sleep :: Int -> IO () Source

Sleep N seconds

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