View Full Version : mutual exclusion issues

04-25-2003, 08:52 AM

I have two threads (or processes) that access two different rendering contexts, respectively. One of them never calls buffer swapping, SwapBuffer(). I just use it to do some matrices transformation. Do they interfere each other? In Win32, do I have to use CCriticalSection to protect some interfered code to ensure mutual exclusion? Please advise. Thanks.


04-25-2003, 09:05 AM
Two contexts don't interfere with each other, except the same context can only be current in a single thread at a time, and the same thread can only have one context current at a time.

However, using a GL context for matrix transformations is not the right thing to do. Download a good matrix or geometry package instead. Using GL for convenience matrix functions is just astoundingly inefficient. Switching contexts to do that sounds even worse.