시간 - SDL

#define TICK_INTERVAL    30

Uint32 TimeLeft(void)
{
    static Uint32 next_time = 0;
    Uint32 now;

    now = SDL_GetTicks();
    if ( next_time <= now ) {
        next_time = now+TICK_INTERVAL;
        return(0);
    }

    return(next_time-now);
}
...
SDL_Delay(TimeLeft());
...