/* If the performance counter delta drifts more than 0.5 seconds from the
 * system time then we recalibrate to the system time.  This means we may
 * move *backwards* in time! */

#define MAX_DIFF Const64(5000000)

static int
_gettimeofday(pTHX_ struct timeval *tp, void *not_used)
{
    dMY_CXT;

    unsigned __int64 ticks;
    FT_t ft;

    if (MY_CXT.run_count++) {
__int64 diff;
FT_t filtim;
GetSystemTimeAsFileTime(&filtim.ft_val);
        QueryPerformanceCounter((LARGE_INTEGER*)&ticks);
        ticks -= MY_CXT.base_ticks;
        ft.ft_i64 = MY_CXT.base_systime_as_filetime.ft_i64
                    + Const64(10000000) * (ticks / MY_CXT.tick_frequency)
                    +(Const64(10000000) * (ticks % MY_CXT.tick_frequency)) / MY_CXT.tick_frequency;
diff = ft.ft_i64 - MY_CXT.base_systime_as_filetime.ft_i64;
if (diff < -MAX_DIFF || diff > MAX_DIFF) {
     MY_CXT.base_ticks = ticks;
     ft.ft_i64 = filtim.ft_i64;
}
    }
    else {
        QueryPerformanceFrequency((LARGE_INTEGER*)&MY_CXT.tick_frequency);
        QueryPerformanceCounter((LARGE_INTEGER*)&MY_CXT.base_ticks);
        GetSystemTimeAsFileTime(&MY_CXT.base_systime_as_filetime.ft_val);
        ft.ft_i64 = MY_CXT.base_systime_as_filetime.ft_i64;
    }

    /* seconds since epoch */
    tp->tv_sec = (long)((ft.ft_i64 - EPOCH_BIAS) / Const64(10000000));

    /* microseconds remaining */
    tp->tv_usec = (long)((ft.ft_i64 / Const64(10)) % Const64(1000000));

    return 0;
}

##</code><code>##

    if (MY_CXT.run_count++) {