SDL_CondWait man page

#include "SDL.h" #include "SDL_thread.h"

int SDL_CondWait(SDL_cond *cond, SDL_mutex *mut);

Wait on the condition variable cond and unlock the provided mutex. The mutex must the locked before entering this function. Returns 0 when it is signalled, or -1 on an error.

SDL_CondWaitTimeout, SDL_CondSignal, SDL_mutexP