Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Fri, 13 Sep 2013 16:47:09 +0200

On 13.09.2013 01:56, Zelazny, Michael Stanley wrote:

If the db library hard codes the time field, it is reasonable for autosave to similarly hard code the time field?

Not really.
Well, maybe.

Pointing TSEL to other fields (like .VAL) is valid. The obtained value

is interpreted as an event number, and the timestamp of the last

occurence of that event is being used. (Requires an event system driver.)

The only way autoSaveRestore could find out if that link to .VAL was put

there intentionally or if it was converted from a link to .TIME would be

looking at the internal flag of the pv_link. (ppv_link->pvlMask &

pvlOptTSELisTime)

I don't know ... that looks a lot like working around a dirty hack with

another dirty hack.

Maybe using a new magic number for TSE would be a cleaner solution: "-3"

= use timestamp of record that TSEL points to.

That would make things a lot more obvious and autoSaveRestore would just

work.

~Ralph

________________________________________
From: [email protected] [[email protected]] On Behalf Of Ralph Lange [[email protected]]
Sent: Wednesday, September 11, 2013 7:30 AM
To: EPICS Tech-Talk
Subject: Re: TSEL question

[snip]

I.e., the link in the database is set up pointing to the VAL field, the
db library hard-codes the time field in recGblGetTimeStamp().

Cheers,
~Ralph

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System