On Tue, Nov 16, 2010 at 2:18 AM, Amy de Buitléir
I've written a very simple daemon, and it's working just fine. But I'd appreciate it if someone could take a look at it and tell me if any of the code I've written is... stupid. (I'm trying to get more comfortable with this monad stuff.) Thank you in advance.
Daemon.hs --------- module Daemon where
import System.Exit import System.IO.Unsafe import System.Posix.Signals import Control.Concurrent
class DaemonState a where initialise :: IO a work :: a -> IO a finalise :: a -> IO ()
To use a typeclass there is pretty strange and doesn't have much advantage, it would be much easier and nicer to just write start to take some functions as parameters (why would there be only one instance for each type...). In other words it works but is only a perversion of the idea of typeclass without any practical advantages. On the other hand if you had some strange pedagogical requirements, feel free to ignore this ! -- Jedaï