[Ndiswrapper-general] NdisGetSystemUpTime

[Steve Tooke <steve@bl...>]

Hi,

I've implemented NdisGetSystemUpTime. This returns the uptime in 
milliseconds.

You'll need to

#inlcude <linux/param.h>

for HZ, which gives the number of clock ticks generated per second, and

#include <linux/sched.h>

for jiffies, which is the system uptime in clock ticks.

/*
  * returns number of milliseconds since system was restarted
  */
STDCALL void NdisGetSystemUpTime (unsigned long *time)
{
#define TICKS_PER_MS             (HZ/1000)
         unsigned long uptime = jiffies/TICKS_PER_MS; /* uptime in ms */
         *time = uptime;
}

Cheers,
Steve

[Ndiswrapper-general] NdisGetSystemUpTime

[Steve Tooke <steve@bl...>]

Hi,

I've implemented NdisGetSystemUpTime. This returns the uptime in 
milliseconds.

You'll need to

#inlcude <linux/param.h>

for HZ, which gives the number of clock ticks generated per second, and

#include <linux/sched.h>

for jiffies, which is the system uptime in clock ticks.

/*
  * returns number of milliseconds since system was restarted
  */
STDCALL void NdisGetSystemUpTime (unsigned long *time)
{
#define TICKS_PER_MS             (HZ/1000)
         unsigned long uptime = jiffies/TICKS_PER_MS; /* uptime in ms */
         *time = uptime;
}

Cheers,
Steve

Re: [Ndiswrapper-general] NdisGetSystemUpTime

[Matthew D Truch <matt@tr...>]

This probably doesn't matter, but if you're really concerned with how
accurate the uptime is, you need to worry about jiffie wrap, as well as
the fact that in new kernels (at least since 2.6.0-test7), jiffies are
set to a *nonzero* value upon boot (currently 5 minutes before
jiffie-wrap).  See <linux/time.h> for INITIAL_JIFFIES

On Thu, Dec 04, 2003 at 09:43:41PM +0000, Steve Tooke wrote:
> Hi,
>=20
> I've implemented NdisGetSystemUpTime. This returns the uptime in=20
> milliseconds.
>=20
> You'll need to
>=20
> #inlcude <linux/param.h>
>=20
> for HZ, which gives the number of clock ticks generated per second, and
>=20
> #include <linux/sched.h>
>=20
> for jiffies, which is the system uptime in clock ticks.
>=20
> /*
>  * returns number of milliseconds since system was restarted
>  */
> STDCALL void NdisGetSystemUpTime (unsigned long *time)
> {
> #define TICKS_PER_MS             (HZ/1000)
>         unsigned long uptime =3D jiffies/TICKS_PER_MS; /* uptime in ms */
>         *time =3D uptime;
> }
>=20
> Cheers,
> Steve
>=20
>=20
>=20
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--=20
"Duct Tape is like the Force.  It has a dark side, a light side, and holds =
the universe together."
--------------------------
Matthew Truch
Department of Physics
Brown University
matt@...
http://matt.truch.net/