Re: [wxhaskell-devel] Application hangs when using processExecAsyncTimed

[shelarcy <she...@gm...>]

Hi,
I'm sorry about my reply is late.

On Thu, 15 May 2008 17:15:54 +0900, Eric Y. Kow <eri...@gm...> wrote:
> Shelarcy: any ideas?

I found Mad's previous patch left an problem for Windows platform.

http://article.gmane.org/gmane.comp.lang.haskell.wxhaskell.general/423

Windows' stdout, stdin and stdout requires console. But we can build
wxHaskell GUI program without console by -optl-mwindows option. So,
withCharResult's "hPutStrLn stderr" causes problem. I fixed this problem
by using Debug.Trace.putTraceMsg instedad of hPutStrLn stderr.

http://www.haskell.org/ghc/docs/6.8.2/html/users_guide/terminal-interaction.html
http://www.haskell.org/ghc/docs/6.8.2/html/libraries/base/Debug-Trace.html#v%3AputTraceMsg

I will send patch soonly (with a few extention). But I don't know this
problem is a Brend's problem.

Best Regards,

> On Thu, May 08, 2008 at 13:10:12 +0200, Bernd Holzmüller wrote:
>> I use wxHaskell 0.10.3 on Windows (XP) for writing a GUI to manage and
>> execute test cases. Sadly, when using processExecAsyncTimed, the whole
>> application sometimes hangs because process termination seems not to be
>> recognized reliably. This happens about every 4th or so try. I used
>> processExecAsync before which works but is deprecated and slow (because
>> we have a byte-wise stdout stream). Any idea whether this is a wxWidgets
>> problem or is wxHaskell specific?

-- 
shelarcy <shelarcy    hotmail.co.jp>
http://page.freett.com/shelarcy/