[Haskell-cafe] Medical Instruments -> Jason
jason.dusek at gmail.com
Wed Nov 11 20:26:13 EST 2009
First of all, I find it striking that you are using the
foreign import ccall unsafe "rs232.h closecport" c_closecport ::
CInt -> CInt
and that it actually works. I would think the only workable
declaration would be:
foreign import stdcall unsafe "rs232.h closecport" closecport :: IO ()
You've tried the signature with `stdcall` and `IO ()` and it
doesn't work at all?
Likewise, your signature for `c_sendmsg` strikes me as
perilous. It should result in a value in `IO`.
However, let's ignore all that for now. I wonder, does the
Haskell always call `closecport`? Maybe you could put in a
print statement in the C to find out?
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