blob: 938aa653836dc5c2e2f998ea03d19a6e9e06138f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
|
import Control.Exception
import Control.Concurrent
import GHC.Conc
import Control.Monad
nfib n = if n < 2 then 1 else nfib (n-2) + nfib (n-1)
main = do
t <- mask_ $ forkIO $ forM_ [1..] $ \n -> nfib n `seq` allowInterrupt
killThread t
let loop = do r <- threadStatus t
when (r /= ThreadFinished) $ do yield; loop
loop
|
