lambdabot-utils-4.1: Utility libraries for the advanced IRC bot, Lambdabot Source code Contents Index

Lambdabot.Signals

Description

The signal story. Posix signals are external events that invoke signal handlers in Haskell. The signal handlers in turn throw dynamic exceptions. Our instance of MonadError for LB maps the dynamic exceptions to SignalCaughts, which can then be caught by a normal catchIrc or handleIrc

Synopsis

newtype SignalException = SignalException Signal withHandler :: (MonadIO m, MonadError e m) => Signal -> Handler -> m () -> m () withHandlerList :: (MonadError e m, MonadIO m) => [Signal] -> (Signal -> Handler) -> m () -> m () ircSignalsToCatch :: [Signal] ircSignalMessage :: Signal -> [Char] ircSignalHandler :: ThreadId -> Signal -> Handler releaseSignals :: IO () catchLock :: MVar () withIrcSignalCatch :: (MonadError e m, MonadIO m) => m () -> m ()

Documentation

newtype SignalException Source

Constructors SignalException Signal Instances Typeable SignalException

withHandler :: (MonadIO m, MonadError e m) => Signal -> Handler -> m () -> m () Source

withHandlerList :: (MonadError e m, MonadIO m) => [Signal] -> (Signal -> Handler) -> m () -> m () Source

ircSignalsToCatch :: [Signal] Source

ircSignalMessage :: Signal -> [Char] Source

ircSignalHandler :: ThreadId -> Signal -> Handler Source

releaseSignals :: IO () Source

Release all signal handlers

catchLock :: MVar () Source

withIrcSignalCatch :: (MonadError e m, MonadIO m) => m () -> m () Source

Register signal handlers to catch external signals

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