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authorJoey Hess2015-11-08 14:50:21 -0400
committerJoey Hess2015-11-08 14:50:21 -0400
commitd7e140aeae8a8ea47976ca1f3e29c4d0b00eacee (patch)
tree31aa4bbf775879dddb307f9d1c99ac84287ca909 /src/System/Process/Concurrent.hs
parentf85b7d1bdc9019fd63c5037094f514a7c7ace8d2 (diff)
parentd50aa85052b1f35021072ea95bc51b5c46c797b0 (diff)
Merge branch 'joeyconfig'
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+-- |
+-- Copyright: 2015 Joey Hess <id@joeyh.name>
+-- License: BSD-2-clause
+--
+-- The functions exported by this module are intended to be drop-in
+-- replacements for those from System.Process, when converting a whole
+-- program to use System.Console.Concurrent.
+
+module System.Process.Concurrent where
+
+import System.Console.Concurrent
+import System.Console.Concurrent.Internal (ConcurrentProcessHandle(..))
+import System.Process hiding (createProcess, waitForProcess)
+import System.IO
+import System.Exit
+
+-- | Calls `createProcessConcurrent`
+--
+-- You should use the waitForProcess in this module on the resulting
+-- ProcessHandle. Using System.Process.waitForProcess instead can have
+-- mildly unexpected results.
+createProcess :: CreateProcess -> IO (Maybe Handle, Maybe Handle, Maybe Handle, ProcessHandle)
+createProcess p = do
+ (i, o, e, ConcurrentProcessHandle h) <- createProcessConcurrent p
+ return (i, o, e, h)
+
+-- | Calls `waitForProcessConcurrent`
+--
+-- You should only use this on a ProcessHandle obtained by calling
+-- createProcess from this module. Using this with a ProcessHandle
+-- obtained from System.Process.createProcess etc will have extremely
+-- unexpected results; it can wait a very long time before returning.
+waitForProcess :: ProcessHandle -> IO ExitCode
+waitForProcess = waitForProcessConcurrent . ConcurrentProcessHandle