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Diffstat (limited to 'libraries/base/tests/T10149.hs')
| -rw-r--r-- | libraries/base/tests/T10149.hs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/libraries/base/tests/T10149.hs b/libraries/base/tests/T10149.hs new file mode 100644 index 0000000000..d15b0d766a --- /dev/null +++ b/libraries/base/tests/T10149.hs @@ -0,0 +1,19 @@ +import Control.Concurrent +import Control.Exception + +main :: IO () +main = do + mask $ \unmask -> mask $ \restore -> + unmask $ restore $ getMaskingState >>= print + uninterruptibleMask $ \unmask -> uninterruptibleMask $ \restore -> + unmask $ restore $ getMaskingState >>= print + + mv <- newEmptyMVar + mask_ $ -- start with exceptions masked + mask $ \restore -> forkIOWithUnmask $ \unmask -> unmask $ + restore $ getMaskingState >>= print >> putMVar mv () + takeMVar mv + uninterruptibleMask_ $ -- start with exceptions uninterruptibly masked + uninterruptibleMask $ \restore -> forkIOWithUnmask $ \unmask -> unmask $ + restore $ getMaskingState >>= print >> putMVar mv () + takeMVar mv |