void
ev_sleep (double delay)
{
    if (delay > 0.)
    {    
#if EV_USE_NANOSLEEP
        struct timespec ts;

        //EV_TS_SET (ts, delay);
        ts.tv_sec = (long)t; 
        ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9);
        nanosleep (&ts, 0);
#elif defined _WIN32
        Sleep ((unsigned long)(delay * 1e3));
#else
        struct timeval tv;

        /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
        /* something not guaranteed by newer posix versions, but guaranteed */
        /* by older ones */
        //EV_TV_SET (tv, delay);
        tv.tv_sec = (long)t; 
        tv.tv_usec = (long)((t - tv.tv_sec) * 1e6);
        select (0, 0, 0, 0, &tv);
#endif
    }    
}