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{-# LANGUAGE OverloadedStrings #-}
module Hsm.Core.Zmq
( withSocket
) where
import Data.Text (Text)
import Effectful (Eff, IOE, (:>))
import Effectful.Log (Log, LogLevel(LogTrace))
import Effectful.Resource (Resource, allocate)
import Hsm.Core.Log (withLogIO)
import System.ZMQ4 qualified as Z
withSocket ::
forall t es. (Z.SocketType t, IOE :> es, Log :> es, Resource :> es)
=> t
-> Eff es (Z.Socket t)
withSocket stype = withLogIO >>= bracket
where
bracket :: (LogLevel -> Text -> IO ()) -> Eff es (Z.Socket t)
bracket logIO = snd . snd <$> allocate acquire release
where
acquire :: IO (Z.Context, Z.Socket t)
acquire = do
logIO LogTrace "Acquiring ZMQ context"
cont <- Z.context
sock <- Z.socket cont stype
return (cont, sock)
--
release :: (Z.Context, Z.Socket t) -> IO ()
release (cont, sock) = do
logIO LogTrace "Releasing ZMQ context"
Z.close sock
Z.shutdown cont
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