On 26 October 2011 21:17, Brent Yorgey
I am pleased to announce that Issue 19 of The Monad.Reader, a special issue on parallelism and concurrency, is now available:
Thanks, I always really enjoy The Monad.Reader.
Issue 19 consists of the following three articles:
* Mighttpd – a High Performance Web Server in Haskell by Kazu Yamamoto
Kazu, really interesting article! I have one question regarding your use of atomicModifyIORef: x <- atomicModifyIORef ref (\_ -> (tmstr, ())) x `seq` return () Can't you write that as just: writeIORef ref tmstr? If you're not using the previous value of the IORef there's no chance of inconsistency. I looked in the git repository of mighttpd2 and it seems that in the FileCache module we can make a similar change by rewriting: remover :: IORef Cache -> IO () remover ref = do threadDelay 10000000 _ <- atomicModifyIORef ref (\_ -> (M.empty, ())) remover ref to: remover :: IORef Cache -> IO () remover ref = forever $ do threadDelay 10000000 writeIORef ref M.empty Regards, Bas