Does one need to call srand() C function per thread or per process to seed the randomizer?

Question

The caption pretty much says it.

PS. This is for C++ Windows program.

Answer 1

Be aware that the state is fiber-local (which is more fine-grained than thread-local). Thus, srand has to be called for each fiber. (Of course, when you don't use fibers it's equivalent to thread-local.)