Kazmath's GL stack doesn't allow for multiple GL contexts/multithreading

[starbugs]

Unfortunately, the current GL stack implementation crashes when calling it from different threads using multiple OpenGL contexts. As I required this specific functionality, I forked kazmath and implemented a TLS based context switch for the stack module (see http://github.com/starbugs/kazmath).

With my modifications, the only thing people have to do when they switch GL contexts is to call kmGLSetCurrentContext(void *) providing a reference to some external context representation that is constant for the lifecycle of a given real GL context. kazmath will then provide a stack for each context automatically (without any changes to the stack interface). My modifications merely require linking to libpthread.

Some background info: I am authoring a GL-based UI framework for iOS/Mac OS X which uses kazmath for most of the math and vector stuff (http://github.com/starbugs/icedcoffee). My modifications have been tested by a very small group of people currently experimenting with my framework -- no issues so far.

Anyway, I thought I just give you a ping and ask whether you're interested in pulling these changes? Maybe they are beneficial to others...

Big thanks for the great library!

Tobias

[Kazade]

Awesome work. I'll pull those two commits into master if that's OK with you?

[starbugs]

Thank you, that's great!

[Kazade]

Merged!