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Fix instance mutex deadlock, accidentally initialized the MVar empty

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This commit is contained in:
fr33domlover 2019-03-09 15:43:30 +00:00
parent 37216d9045
commit 468202cf45
1 changed files with 2 additions and 2 deletions
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4
src/Vervis/RemoteActorStore.hs
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@ -28,7 +28,7 @@ where
import Prelude
import Control.Concurrent.MVar (MVar, newEmptyMVar)
import Control.Concurrent.MVar (MVar, newMVar)
import Control.Concurrent.STM.TVar
import Control.Monad
import Control.Monad.STM
@ -93,7 +93,7 @@ withHostLock host action = do
case existing of
Just v -> return v
Nothing -> do
v <- newEmptyMVar
v <- newMVar ()
atomically $ stateTVar tvar $ \ m ->
case M.lookup host m of
Just v' -> (v', m)