Re: [ctypes-users] callbacks called from threads

[Leonard \paniq\ R. <pa...@gm...>]

heh. you are right!

i changed

sdl_mixer.Mix_SetPostMix(mixmusic_callback_type(self.mixmusic_callback),0)		

to 

self.cbtype = mixmusic_callback_type(self.mixmusic_callback)
sdl_mixer.Mix_SetPostMix(self.cbtype, 0)		

and now it works :D

i was searching the tutorial for threading information but there was no
single "thread" word found in the tut. it could at least be mentioned
that threading is supported :)

On Tue, 2005-10-25 at 10:00 +0900, Guillaume Proux wrote:
> From http://starship.python.net/crew/theller/ctypes/tutorial.html  :
> could this be your problem?
> 
> 
> 
> 
> A warning for callback functions
> Important Note: 
> 
> Make sure you keep references to CFUNCTYPE objects as long as they are
> used from C code. ctypes doesn't, and if you don't, they may be
> garbage collected, crashing your program when a callback is made.
> 
> 
> Rgds,
> 
> Guillaume
> 
> On 10/25/05, Leonard paniq Ritter <pa...@gm...> wrote:
>         is it possible to pass a callback function to a library that
>         is going to
>         call this function from a different thread?
>         
>         if, how?
>         
>         if not, why?
>         
>         i am doing this with SDL_mixer and Mix_SetPostMix, and i get a
>         segfault 
>         when i am doing something else in the main thread meanwhile.
>         
>         --
>         -- leonard "paniq" ritter
>         -- http://www.mjoo.org
>         -- http://www.paniq.org
>         
>         
>         
>         
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