Re: [gpsd-users] Flush unconsumed GPS reports in Python

[Gary E. Miller]

Yo Alex!

On Wed, 20 Dec 2017 10:16:11 +0000
Alex <address@hidden> wrote:

> I understand the logic of what you say and it was my intention to
> implement something like that. However, given that this is probably a
> common scenario

Nope, never heard of anyone trying the same.

> - I was wondering if I wouldn't be reinventing the bicycle, and if
> there are existing solutions to this problem.

Nope.  None that I know of.  gpsd users are concerned about latency.
Waiting around for the next GPS input, which could take quite a while,
just drives latency way up and annoys the end users.

> I am guessing there are none, so I wrote this, with the intention of
> calling this function every time I need a fresh report. It clears the
> queue, then I can call my regular read function:

Or, instead of clearing the Queue that you yourself created.  Just
close the port 2947, then open it when you want the next readings.

> 1. Is it possible that the speed at which new reports are received is
> much higher than the speed at which they are consumed?  (even without
> any `sleep` calls inside the loop??!)

Nah, it would be rare to see even 10 gpsd reports a second.  Unless
you are using an expensive high rate GPS.

> This is somewhat puzzling, because as you said - it shouldn't be a
> complicated matter.

Yup, you are just making it commpicated.

RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
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