1 files changed, 35 insertions, 0 deletions
diff --git a/testsuite/tests/concurrent/should_run/conc036.hs b/testsuite/tests/concurrent/should_run/conc036.hs
new file mode 100644
index 0000000000..ead85a530d
--- /dev/null
+++ b/testsuite/tests/concurrent/should_run/conc036.hs
@@ -0,0 +1,35 @@
+{-# LANGUAGE ForeignFunctionInterface #-}
+{-# OPTIONS -cpp #-}
+module Main where
+
+import Control.Concurrent
+import Control.Exception
+import Prelude hiding (catch)
+import Foreign
+import System.IO
+
+#ifdef mingw32_HOST_OS
+sleep n = sleepBlock (n*1000)
+foreign import stdcall unsafe "Sleep" sleepBlock :: Int -> IO ()
+#else
+sleep n = sleepBlock n
+foreign import ccall unsafe "sleep" sleepBlock :: Int -> IO ()
+#endif
+
+main :: IO ()
+main = do
+  newStablePtr stdout -- prevent stdout being finalized, sigh
+  th <- newEmptyMVar
+  forkIO $ do
+     putStrLn "newThread started"
+     sleep 1
+     putMVar th "child"
+  threadDelay 500000
+  yield -- another hack, just in case child yields right after "sleep 1"
+  putMVar th "main" `catch` (\BlockedIndefinitelyOnMVar -> return ())
+	-- tests that the other thread doing an unsafe call to 
+	-- sleep(3) has blocked this thread.  Not sure if this
+	-- is a useful test.
+  x <- takeMVar th
+  putStrLn x
+  putStrLn "\nshutting down"