[PyOpenGL-Users] threading porblem leads to segfaults (with wxpython)

[Alexander G. <Ale...@tu...>]

Hi list!

I've got a little problem with following code. (extra for you stripped
down to the minimum)

<snip>

#!/usr/bin/env python
from OpenGL.GL import *
import threading
from time import sleep
from wx import wx
from wx import glcanvas


class foo(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
        self.canvas = glcanvas.GLCanvas(frame, pos =(0,0), size= (100,100))
        self.canvas.SetCurrent()


    def run(self):
        while True:
            glFlush()         # dies here
            sleep(1)



app = wx.PySimpleApp()
frame = wx.Frame(None, -1, "blafasel",(100,100))
t = foo()
frame.Show(True)
t.start()      #dies
# glFlush()    #lives
app.MainLoop()




</snip>

which gives following error message


<snip>

imtrey% ./test2.py
zsh: segmentation fault (core dumped)  ./test2.py
imtrey%

</snip>


Which does not happen, if I don't start the foo thread but call glFlush
alone.

Can someone please point me to my mistake?

Best wishes,
alex