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Message-ID: <4D7CF828.6050608@mail.berlios.de>
Date: Sun, 13 Mar 2011 18:00:24 +0100
From: Stefan Weil <weil@mail.berlios.de>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] [PATCH] win32: implement missing timersub
References: <AANLkTinEWYoC41sjAGwZ7oCLdu1=Tk-XkP9UJgieZBoi@mail.gmail.com>
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To: Blue Swirl <blauwirbel@gmail.com>
Cc: qemu-devel <qemu-devel@nongnu.org>

Am 13.03.2011 15:49, schrieb Blue Swirl:
> Implement and wrap timersub() for Win32.
>
> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
> ---
> osdep.h | 19 +++++++++++++++++--
> ui/vnc.c | 6 +++---
> 2 files changed, 20 insertions(+), 5 deletions(-)
>
> diff --git a/osdep.h b/osdep.h
> index 27eedcf..8c45000 100644
> --- a/osdep.h
> +++ b/osdep.h
> @@ -8,9 +8,7 @@
> #include <sys/signal.h>
> #endif
>
> -#ifndef _WIN32
> #include <sys/time.h>
> -#endif
>
> #ifndef glue
> #define xglue(x, y) x ## y
> @@ -131,4 +129,21 @@ int qemu_madvise(void *addr, size_t len, int advice);
>
> int qemu_create_pidfile(const char *filename);
>
> +#ifdef _WIN32
> +static inline void qemu_timersub(const struct timeval *val1,
> + const struct timeval *val2,
> + struct timeval *res)
> +{
> + res->tv_sec = val1->tv_sec - val2->tv_sec;
> + if (val1->tv_usec - val2->tv_usec < 0) {

shorter: if (val1->tv_usec < val2->tv_usec) {

> + res->tv_sec--;
> + res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
> + } else {
> + res->tv_usec = val1->tv_usec - val2->tv_usec;
> + }
> +}
> +#else
> +#define qemu_timersub timersub
> +#endif
> +
> #endif
> diff --git a/ui/vnc.c b/ui/vnc.c
> index 34dc0cd..1b68965 100644
> --- a/ui/vnc.c
> +++ b/ui/vnc.c
> @@ -2302,7 +2302,7 @@ static int vnc_update_stats(VncDisplay *vd,
> struct timeval * tv)
> }
> }
>
> - timersub(tv, &VNC_REFRESH_STATS, &res);
> + qemu_timersub(tv, &VNC_REFRESH_STATS, &res);
>
> if (timercmp(&vd->guest.last_freq_check, &res, >)) {
> return has_dirty;
> @@ -2320,7 +2320,7 @@ static int vnc_update_stats(VncDisplay *vd,
> struct timeval * tv)
> }
>
> max = rect->times[(rect->idx + count - 1) % count];
> - timersub(tv, &max, &res);
> + qemu_timersub(tv, &max, &res);
>
> if (timercmp(&res, &VNC_REFRESH_LOSSY, >)) {
> rect->freq = 0;
> @@ -2331,7 +2331,7 @@ static int vnc_update_stats(VncDisplay *vd,
> struct timeval * tv)
>
> min = rect->times[rect->idx];
> max = rect->times[(rect->idx + count - 1) % count];
> - timersub(&max, &min, &res);
> + qemu_timersub(&max, &min, &res);
>
> rect->freq = res.tv_sec + res.tv_usec / 1000000.;
> rect->freq /= count;

Acked-by: Stefan Weil <weil@mail.berlios.de>