In a multi-threaded C++ app, do I need a mutex to protect a simple boolean?

Question

I have a multi-threaded C++ app which does 3D rendering with the OpenSceneGraph library. I\'m planning to kick off OSG\'s render loop as a separate thread using boost::threa

Answer 1

This thread has a little more info and discussion on thread-safety, especially for simple data types:

How can I create a thread-safe singleton pattern in Windows?