Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Tue, 15 Aug 2017 13:17:47 -0500

Hi Michael,

On 08/15/2017 12:52 PM, Dunning, Michael wrote:
> Thanks for the background info.  In my case, I think it's the latter:
> working around limitations of subRecord.  But we're hesitant to
> completely rewrite the code because it's very old and very extensive.
> 
> Is there any reason to suspect that defining the macro as I have would
> not work presently, or break in the future?

Defining the macro should continue to work for 3.15.x, 3.16.x and at
least for the first release of EPICS 7; we aren't planning to change the
basic database link implementation for the time-being, but I can't
promise how long that will last. If you can rewrite this code to use the
aSub record type I would recommend that you add that work to your plans
for the medium-term.

BTW since it's being run within the context of a subRecord subroutine
there is no need for your code snippet to be calling dbScanLock() and
dbScanUnlock() on the linked-to record; in 3.14 and above all records
linked together using DB links are placed in the same lock-set. This
might not have been the case when the code was originally written though.

- Andrew

-- 
Arguing for surveillance because you have nothing to hide is no
different than making the claim, "I don't care about freedom of
speech because I have nothing to say." -- Edward Snowdon

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System