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Re: [gpsd-dev] SHM refclock improvements
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-dev] SHM refclock improvements |
Date: |
Wed, 29 Aug 2012 15:29:28 -0700 |
Yo Miroslav!
On Wed, 29 Aug 2012 11:03:22 +0200
Miroslav Lichvar <address@hidden> wrote:
> Allocate two ints from the dummy array for clockTimeStampNSec and
> receiveTimeStampNSec, the client fills all usecs and nsecs fields, and
> the server uses the nsec fields only if nsec / 1000 == usec. That's
> it. If they match by accident, it's noise below microsecond.
I checked gpsd and the entire shmTime structure is first zeroed before
use. So that should work and be forward/back compatible. I could add
that to gpsd git in a few minutes.
As long as we know an 'int' will be at least 4 bytes. Do we know that?
> For the other issues with SHM, if they really cause some problems,
> it's probably better to make a new protocol from scratch instead of
> trying to extend SHM.
Yes, long term getting off of SHM is a good idea. Short term we
can patch SHM.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
address@hidden Tel:+1(541)382-8588
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- Re: [gpsd-dev] SHM refclock improvements, (continued)
- Re: [gpsd-dev] SHM refclock improvements, Hal Murray, 2012/08/28
- Re: [gpsd-dev] SHM refclock improvements, Gary E. Miller, 2012/08/28
- Re: [gpsd-dev] SHM refclock improvements, Harlan Stenn, 2012/08/28
- Re: [gpsd-dev] SHM refclock improvements, Gary E. Miller, 2012/08/28
- Re: [gpsd-dev] SHM refclock improvements, Dave Platt, 2012/08/28
- Re: [gpsd-dev] SHM refclock improvements, Harlan Stenn, 2012/08/28
- Re: [gpsd-dev] SHM refclock improvements, Eric S. Raymond, 2012/08/28
- Re: [gpsd-dev] SHM refclock improvements, Hal Murray, 2012/08/28
- Re: [gpsd-dev] SHM refclock improvements, Eric S. Raymond, 2012/08/28
Re: [gpsd-dev] SHM refclock improvements, Miroslav Lichvar, 2012/08/29
- Re: [gpsd-dev] SHM refclock improvements,
Gary E. Miller <=