remove all files that aren't used in GF-3.0

src-3.0/GF/System/UseSignal.hs

@@ -1,58 +0,0 @@
-----------------------------------------------------------------------
--- |
--- Module      : GF.System.UseSignal
--- Maintainer  : Bjorn Bringert
--- Stability   : (stability)
--- Portability : (portability)
---
--- > CVS $Date: 2005/11/11 11:12:50 $ 
--- > CVS $Author: bringert $
--- > CVS $Revision: 1.1 $
---
--- Allows SIGINT (Ctrl-C) to interrupt computations.
------------------------------------------------------------------------------
-
-module GF.System.UseSignal where
-
-import Control.Concurrent (myThreadId, killThread)
-import Control.Exception (Exception,catch)
-import Prelude hiding (catch)
-import System.IO
-import System.Posix.Signals
-
-{-# NOINLINE runInterruptibly #-}
-
--- | Run an IO action, and allow it to be interrupted
---   by a SIGINT to the current process. Returns
---   an exception if the process did not complete 
---   normally.
---   NOTES: 
---   * This will replace any existing SIGINT
---     handler during the action. After the computation 
---     has completed the existing handler will be restored.
---   * If the IO action is lazy (e.g. using readFile,
---     unsafeInterleaveIO etc.) the lazy computation will
---     not be interruptible, as it will be performed
---     after the signal handler has been removed.
-runInterruptibly :: IO a -> IO (Either Exception a)
-runInterruptibly a = 
-    do t <- myThreadId
-       oldH <- installHandler sigINT (Catch (killThread t)) Nothing
-       x <- p `catch` h
-       installHandler sigINT oldH Nothing
-       return x
-  where p = a >>= \x -> return $! Right $! x
-        h e = return $ Left e
-
--- | Like 'runInterruptibly', but always returns (), whether
---   the computation fails or not.
-runInterruptibly_ :: IO () -> IO ()
-runInterruptibly_ = fmap (either (const ()) id) . runInterruptibly
-
--- | Run an action with SIGINT blocked.
-blockInterrupt :: IO a -> IO a
-blockInterrupt a = 
-    do oldH <- installHandler sigINT Ignore Nothing
-       x <- a
-       installHandler sigINT oldH Nothing
-       return x