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Date: Fri, 24 Jul 2009 11:12:36 +0200
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Subject: Re: strange behavior with threads...
From: jean-luc malet <jeanluc DOT malet AT gmail DOT com>
To: cygwin AT cygwin DOT com
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On Thu, Jul 23, 2009 at 4:11 PM, Corinna
Vinschen<corinna-cygwin AT cygwin DOT com> wrote:
> On Jul 23 15:50, jean-luc malet wrote:
>> Hi!
>> I've the following code :
>> void _Window::Start(void* arg)
>> {
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 ThreadArgs args;
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 args.TheWindow=3Dthis;
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 args.args=3Darg;
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 int err =3D pthread_create(&main_thread,NULL=
,_Start, (void*)&args);
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 if (err)
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 {
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 throw new =C2=A0=
Exception(err, "window thread creation error");
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 }
>> }
>> void* _Window::_Start(void* arg)
>> {
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 ThreadArgs* args =3D (ThreadArgs*) arg;
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 pthread_exit((void*)args->TheWindow->start_r=
outine(args->args));
>> }
>>
>> _Window::_Start is static
>>
>> for some reason that I can't determine it happens that args in
>> _Window::_Start have strange value (args->TheWindow don't contain a
>> valid pointer, ie a pointer on a _Window object)
>
> Maybe you shouldn't let the arg to the thread point to a local
> stack-based variable in the other method which, as you code implies,
> returns after having started the thread...
>
>
> Corinna
>
> --
> Corinna Vinschen =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0Please, send mails regarding Cygwin to
> Cygwin Project Co-Leader =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0cygwin AT cygw=
in DOT com
> Red Hat
>
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imple
>
>

Yes, sorry for such lame question :( I should have seen this issue
the code has been modified and has been tested under linux and is now
working as expected under linux, thanks
however I have a X server connection issue

freeglut (./tests/GENERATED/GlutWindowTest): Unable to create direct
context rendering for window ' '
This may hurt performance.
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0.=
0"
      after 34 requests (32 known processed) with 5 events remaining.

think I will have to post on Cygwin/X ML

thanks for help
JLM

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(garde le simple, imb=C3=A9cile!)
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-----------------------------
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essayez donc de dormir avec un moustique dans votre chambre." Betty
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