Basic mutex template, using SDL's threading systems.

gistfile1.cpp

int thread(void*) {
  SDL_mutexP(lock); //remember: p for pause
  if (/* not ready */) {
    SDL_CondWait(cond, lock);
  }
  //do something
  SDL_mutexV(lock);
  SDL_CondSignal(otherCond);
}