diff options
Diffstat (limited to 'P2P/IO.hs')
| -rw-r--r-- | P2P/IO.hs | 10 |
1 files changed, 8 insertions, 2 deletions
@@ -32,6 +32,7 @@ import Control.Concurrent.Async import qualified Data.ByteString as B import qualified Data.ByteString.Lazy as L +-- Type of interpreters of the Proto free monad. type RunProto = forall a m. (MonadIO m, MonadMask m) => Proto a -> m (Maybe a) data RunEnv = RunEnv @@ -41,8 +42,10 @@ data RunEnv = RunEnv , runOhdl :: Handle } --- Implementation of the protocol, communicating with a peer --- over a Handle. No Local actions will be run. +-- Interpreter of Proto that communicates with a peer over a Handle. +-- +-- No Local actions will be run; if the interpreter reaches any, +-- it returns Nothing. runNetProtoHandle :: (MonadIO m, MonadMask m) => RunEnv -> Proto a -> m (Maybe a) runNetProtoHandle runenv = go where @@ -51,6 +54,9 @@ runNetProtoHandle runenv = go go (Free (Net n)) = runNetHandle runenv go n go (Free (Local _)) = return Nothing +-- Interprater of Net that communicates with a peer over a Handle. +-- +-- An interpreter for Proto has to be provided. runNetHandle :: (MonadIO m, MonadMask m) => RunEnv -> RunProto -> NetF (Proto a) -> m (Maybe a) runNetHandle runenv runner f = case f of SendMessage m next -> do |