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Re: [gpsd-dev] SHM code

From: Harlan Stenn
Subject: Re: [gpsd-dev] SHM code
Date: Sun, 15 Feb 2015 09:38:04 +0000

"Eric S. Raymond" writes:
> Harlan Stenn <address@hidden>:
> > Folks have chatted about things they'd like to see in an improved SHM
> > interface.
> > 
> > Please add ideas and comments at:
> > 
> >
> Registration requirements are annoying.

Spam is way more annoying.

> Please include a version number as first field so future report
> sources can be written with forward portability.

Yeah, I always wanted that.  The problem with doing it now is it's
backward incompatible.

> Please use ISO/POSIX fixed-sized types for the fields to address the data
> interchange problem.


> Please publish the header layout as a .h file containing
> clockTimeStampSec and other required types, called something like
> ntpshm.h, and ship it for inclusion with compilers and libraries.

Makes sense.

> The dummy field is useful; a segment-in-use flag can live there (though
> the GPSD implementation does not currently do this).  Some field 
> space reserved for use as client flags would be nice.

How does one decide who is using which areas for client flags?  The
answer to this may become more apparent after I wake up.


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