SDL_GetTicks - Gets the number of milliseconds since the SDL library initialization.

SDL_Delay - Waits a specified number of milliseconds before returning.

SDL_AddTimer - Adds a timer which will call a callback after the specified number of milliseconds has elapsed.

SDL_RemoveTimer - Removes a timer which was added with SDL_AddTimer.

SDL_SetTimer - Sets a callback to run after the specified number of milliseconds has elapsed (deprecated)