Re: Timer start registration breaks the gtk_main()

[ikorot earthlink net]

Nicola,


-----Original Message-----
>From: Nicola Fontana <ntd entidi it>
>Sent: Mar 26, 2011 1:10 PM
>To: ikorot earthlink net
>Cc: Robert Pearce <rob bdt-home demon co uk>, gtk-list gnome org
>Subject: Re: Timer start registration breaks the gtk_main()
>
>Il giorno Sat, 26 Mar 2011 11:38:27 -0700 (GMT-07:00)
>ikorot earthlink net ha scritto:
>
>> Hi, Robert,
>> 
>> 
>> -----Original Message-----
>> >From: Robert Pearce <rob bdt-home demon co uk>
>> >Sent: Mar 26, 2011 2:19 AM
>> >To: gtk-list gnome org
>> >Cc: ikorot earthlink net
>> >Subject: Re: Timer start registration breaks the gtk_main()
>> >
>> >Hi ikorot earthlink net,
>> >
>> >On Sat, 26 Mar 2011 01:54:31 -0700 (GMT-07:00) you wrote:
>> >> Hi, ALL,
>> >> Is it possible for the timer to cause gtk_main() to crash?
>> >>
>> >It's possible for anything to become the point where your program
>> >crashes if you are sufficiently badly abusing it. Why do you pick on
>> >"the timer" as your suspect? 
>> 
>> If I comment out the call to g_timer_add_seconds() it does not crash.
>> 
>> Here is what I do:
>> 
>> int main()
>> {
>>       CFrame *frame = new CFrame();
>>       result = frame->OpenPort();
>>       if( !result )
>>           return 1;
>>       else
>>       {
>>            g_timer_add_seconds( 1, (GSourceFunc) frame->ReadData(), NULL );
>>            gtk_widget_show( window );
>>            frame->ReadData();
>>            gtk_main();
>>       }
>> }
>> 
>> in frame.h:
>> 
>> class CFrame
>> {
>>      void ReadData();
>> }
>> 
>> Do you see any problems with that?
>> Basically followed example from http://zetcode.com/tutorials/gtktutorial/gtkevents/.
>
>ReadData() is not a good old C function, but a C++ method, carrying
>around a pointer to the CFrame instance. You should make ReadData() static
>or use more advanced tecniques, such as libsigc++ [1].

So all I need is to do:

class CFrame
{
     static void ReadData();
}

?

Thank you.
>
>Ciao.
>-- 
>Nicola
>
>
>[1] http://libsigc.sourceforge.net/
>
>> 
>> >
>> >> How do I debug/fix it?
>> >> 
>> >
>> >There are many answers to this, all outside the scope of this mailing
>> >list. How do you normally approach debugging?
>> 
>> Just run the program under gdb and get the point of crash.
>> Check all the variables at runtime under gdb.
>> Then study the code and see what the problem is.
>> 
>> Thank you.
>> 
>> >
>> >Cheers,
>> >Rob
>> 
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