This commit is contained in:
Joey Hess 2012-06-17 14:02:40 -04:00
parent 9356f11c60
commit e84b78f40c
2 changed files with 15 additions and 16 deletions

View file

@ -7,11 +7,7 @@
module Utility.ThreadLock where
import Common
import System.Posix.Terminal
import Control.Concurrent.MVar
import System.Posix.Signals
type Lock = MVar ()
@ -21,15 +17,3 @@ newLock = newMVar ()
{- Runs an action with a lock held, so only one thread at a time can run it. -}
withLock :: Lock -> IO a -> IO a
withLock lock = withMVar lock . const
{- Pauses the main thread, letting children run until program termination. -}
waitForTermination :: IO ()
waitForTermination = do
lock <- newEmptyMVar
check softwareTermination lock
whenM (queryTerminal stdInput) $
check keyboardSignal lock
takeMVar lock
where
check sig lock = void $
installHandler sig (CatchOnce $ putMVar lock ()) Nothing