Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 1 Jun 2011 14:27:10 -0500

Hi Matt,

On 2011-06-01 [email protected] wrote:
> I've noticed that the NUSE field in the compress record isn't posted as an
>  event. Is there a reason for this? Can we modify the record to post
>  changes to NUSE?

I don't see why not, although I it might not be the only field we want to post 
changes for.  I see updates happening to the OFF, INPN, INX and CVB fields as 
well during processing, but I'm not too sure what they're all used for.

> I attempted a patch on our local copy of base 3.14.11... But for some
>  reason it didn't work. Have I missed something?

Yup, an & before the second parameter to db_post_events() which is a pointer 
to the field that has just changed.  BPTR contains a pointer to the data in 
VAL, so the existing call to db_post_events() is actually notifying RSRV about 
a change to the VAL field.  Try this instead:

--- src/rec/compressRecord.c    (revision 62483)
+++ src/rec/compressRecord.c    (working copy)
@@ -92,7 +92,10 @@
 
         monitor_mask = recGblResetAlarms(prec);
	monitor_mask |= (DBE_LOG|DBE_VALUE);
-	if(monitor_mask) db_post_events(prec,prec->bptr,monitor_mask);
+        if (monitor_mask) {
+            db_post_events(prec, &prec->nuse, monitor_mask);
+            db_post_events(prec, prec->bptr, monitor_mask);
+        }
 	return;
 }
 

- Andrew
-- 
Optimization is the process of taking something that works and
replacing it with something that almost works, but costs less.
-- Roger Needham


Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System