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51 lines
1008 B
Idris
51 lines
1008 B
Idris
module Main
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import System
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import System.Concurrency
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import System.Info
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-- Taken from tests/chez/futures001
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-- Issue in MacOS brew chez related to clock ( https://github.com/Homebrew/homebrew-core/pull/10159 )
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-- Windows seems to be really flaky with usleep
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extraSleep : (us : Int) -> So (us >= 0) => IO ()
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extraSleep us =
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if (os == "darwin" || isWindows)
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then sleep (us `div` 10000)
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else usleep us
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producer : Channel Nat -> IO ()
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producer ch =
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do send 1
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send 2
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send 3
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send 4
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where
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send : Nat -> IO ()
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send i =
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do putStrLn $ "> " ++ show i
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channelPut ch i
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extraSleep 10000
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consumer : Channel Nat -> IO ()
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consumer ch =
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do recv
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recv
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recv
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recv
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where
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recv : IO ()
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recv =
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do extraSleep 20000
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v <- channelGet ch
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putStrLn $ "< " ++ show v
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main : IO ()
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main =
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do ch <- makeChannel
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p <- fork $ producer ch
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c <- fork $ consumer ch
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threadWait c
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threadWait p
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putStrLn "done"
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