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Use an IORef rather than a MVar.

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The job of a manager is to synchronize threads, so it is not necessary to block.
This commit is contained in:
Timo von Holtz 2015-03-05 09:49:15 +11:00
parent 1af0d7b5ab
commit aeb1136658
1 changed files with 4 additions and 6 deletions
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10
src/Servant/Common/Req.hs
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@ -3,13 +3,13 @@
module Servant.Common.Req where
import Control.Applicative
import Control.Concurrent
import Control.Exception
import Control.Monad
import Control.Monad.Catch (MonadThrow)
import Control.Monad.IO.Class
import Control.Monad.Trans.Either
import Data.ByteString.Lazy hiding (pack, filter, map, null)
import Data.IORef
import Data.String
import Data.String.Conversions
import Data.Proxy
@ -98,13 +98,11 @@ reqToRequest req (BaseUrl reqScheme reqHost reqPort) =
-- * performing requests
{-# NOINLINE __manager #-}
__manager :: MVar Manager
__manager = unsafePerformIO (newManager tlsManagerSettings >>= newMVar)
__manager :: IORef Manager
__manager = unsafePerformIO (newManager tlsManagerSettings >>= newIORef)
__withGlobalManager :: (Manager -> IO a) -> IO a
__withGlobalManager action = modifyMVar __manager $ \ manager -> do
result <- action manager
return (manager, result)
__withGlobalManager action = readIORef __manager >>= action
displayHttpRequest :: Method -> String