#5797: readRawBufferPtr cannot be interrupted by exception on Windows with
-threaded
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Reporter: joeyadams | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: libraries/base | Version: 7.2.2
Keywords: | Os: Windows
Architecture: x86 | Failure: Incorrect result at runtime
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by simonmar):
No, `threadWaitRead` is not implemented on Windows with `-threaded`.
You can use a simple Async wrapper:
{{{
data Async a = Async (MVar a)
async :: IO a -> IO (Async a)
async action = do
var <- newEmptyMVar
forkIO (action >>= putMVar var)
return (Async var)
wait :: Async a -> IO a
wait (Async var) = readMVar var
}}}
the problem here is that cancelling the `wait` call will not cancel the
actual IO operation. That might not matter, depending on the details of
your particular situation. FWIW, this is what happens in the non-threaded
RTS, except that the behaviour is built into the RTS.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5797#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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