[GtkGLExt] driving rendering with signals

[Wesley Smith <wesley hoke gmail com>]

As I'm trying to integrate gtkgl into my app, I'm running into
problems with deadlock in pthreads.  From the looks of it, these libs
aren't reentrant as I'm getting lots of stalls with backtraces that
look like: http://www.mat.ucsb.edu/whsmith/temp/gdb.txt .  Ideally,
I'd like to drive everything from my own timer, but sometimes it
overtakes GtkGL's rendering/querying.  Is there any way around this or
am I forced to use glib timers?

thanks,
wes