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| author | David Terei <davidterei@gmail.com> | 2011-07-20 11:09:03 -0700 |
|---|---|---|
| committer | David Terei <davidterei@gmail.com> | 2011-07-20 11:26:35 -0700 |
| commit | 16514f272fb42af6e9c7674a9bd6c9dce369231f (patch) | |
| tree | e4f332b45fe65e2a7a2451be5674f887b42bf199 /testsuite/tests/ffi/should_run/ffi014.hs | |
| parent | ebd422aed41048476aa61dd4c520d43becd78682 (diff) | |
| download | haskell-16514f272fb42af6e9c7674a9bd6c9dce369231f.tar.gz | |
Move tests from tests/ghc-regress/* to just tests/*
Diffstat (limited to 'testsuite/tests/ffi/should_run/ffi014.hs')
| -rw-r--r-- | testsuite/tests/ffi/should_run/ffi014.hs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/testsuite/tests/ffi/should_run/ffi014.hs b/testsuite/tests/ffi/should_run/ffi014.hs new file mode 100644 index 0000000000..4434bef21a --- /dev/null +++ b/testsuite/tests/ffi/should_run/ffi014.hs @@ -0,0 +1,29 @@ +-- exposed a bug in GHC 6.4 threaded RTS, fixed in Schedule.c rev. 1.232
+
+module Main where
+
+import Control.Concurrent
+import Control.Monad
+import Foreign.Ptr
+import Data.IORef
+
+main = do
+ ms <- replicateM 100 $ do putStrLn "."
+ m <- newEmptyMVar
+ forkOS (thread >> putMVar m ())
+ thread
+ return m
+ mapM takeMVar ms
+
+thread = do var <- newIORef 0
+ let f = modifyIORef var (1+)
+ callC =<< mkFunc f
+
+type FUNC = IO ()
+
+foreign import ccall unsafe "wrapper"
+ mkFunc :: FUNC -> IO (FunPtr FUNC)
+
+foreign import ccall safe "ffi014_cbits.h callC"
+ callC:: FunPtr FUNC -> IO ()
+
|