[Pyrex] Re: callback

[Bryan Weingarten]

i'm not sure if it helps, but here is the declarations from the header i'm
using.

cdef extern from "../playif.h":
    ctypedef int (*status)(void *, long, long)
    void set_status_callback(int, status, void*)

> class Play
>     def status_callback(self, callback, user_data):
>         data = (callback, user_data)
>         set_status_callback(self.ctx, _callback_wrapper, <void*>data)
>
> cdef int _callback_wrapper(void *data, long sec, long msec):
>     callback, user_data = <object>data # this is line 56
>     return callback(data, sec, msec)
>
> when i compile this i get the following error
> C:\src>mpgedit.pyx:56:20: Cannot convert 'void (*)' to Python object
>
> when i use the global variable technique as pedro suggested i get an
> additional error
> C:\src>mpgedit.pyx:49:8: '%s' redeclared
> C:\src>mpgedit.pyx:55:20: Cannot convert 'void (*)' to Python object
>
> line 49 is the "global data" line
>
>
> john,
>
> i would prefer to use your Py_INCREF and Py_DECREF since i'm used to using
> that when i write extesions manually.  but i don't see how use it in my
> case.  in my example, i don't see where to Py_INCREF or Py_DECREF.
>
>
> bryan
>
>
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