Created
July 25, 2015 08:37
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| do | |
| balanceA <- newTVarIO (400 :: Int) | |
| balanceB <- newTVarIO (900 :: Int) | |
| replicateM_ 100 . forkIO $ do | |
| atomically $ do | |
| modifyTVar balanceA (\x -> x + 2) | |
| modifyTVar balanceB (\x -> x - 2) | |
| readTVarIO balanceA >>= print | |
| readTVarIO balanceB >>= print |
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