1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
import Prelude hiding ( lookup )
import Control.Monad
import Control.Concurrent
import Data.IORef
import Data.Cache.LRU.IO.Internal
main :: IO ()
main = do
v1 <- newAtomicLRU $ Just 10 -- for endless inserts
v2 <- newAtomicLRU $ Just 10 -- for endless lookups (miss)
v3 <- newAtomicLRU $ Just 10 -- for endless lookups (hit)
counter <- newIORef (0 :: Int)
insert 1 "bar" v3
forever $ do
c <- readIORef counter
writeIORef counter $ c + 1
insert c (show c) v1
lookup (1 :: Int) v2
lookup (1 :: Int) v3
|
