Re: [PATCH v2 5/8] kernel32: Implement GetSystemTimeAsFileTime() directly.

[Alexandre Julliard]

Huw Davies  writes:
> @@ -764,7 +768,38 @@ void WINAPI GetSystemTimeAsFileTime( FILETIME *time )
>  {
>      LARGE_INTEGER t;
> - NtQuerySystemTime( &t );
>
> +#ifdef HAVE_CLOCK_GETTIME
> - struct timespec ts;
> - static clockid_t clock_id = CLOCK_MONOTONIC; /* placeholder */
> -
> - if (clock_id == CLOCK_MONOTONIC)
> - {
>
> +#ifdef CLOCK_REALTIME_COARSE
> -
>    struct timespec res;
> -
> -
>    /* Use CLOCK_REALTIME_COARSE if it has 1 ms or better resolution */
> -
>    if (!clock_getres( CLOCK_REALTIME_COARSE, &res ) && res.tv_sec == 0 && res.tv_nsec <= 1000000)
> -
>        clock_id = CLOCK_REALTIME_COARSE;
> -
>    else
>
> +#endif /* CLOCK_REALTIME_COARSE */
> -
>        clock_id = CLOCK_REALTIME;
> - }
> -
> - if (!clock_gettime( clock_id, &ts ))
> - {
> -
>    t.QuadPart = ts.tv_sec * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
> -
>    t.QuadPart += (ts.tv_nsec + 50) / 100;
> - }
> - else
>
> +#endif /* HAVE_CLOCK_GETTIME */
> - {
> -
>    struct timeval now;
> -
> -
>    gettimeofday( &now, 0 );
> -
>    t.QuadPart = now.tv_sec * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
> -
>    t.QuadPart += now.tv_usec * 10;
> - }
> -

Do we really need to duplicate the entire thing?

If the extra call to ntdll is really that expensive, you could probably
forward to it instead.