Experimental Physics and
Industrial Control System

Michael Ritzert <[email protected]> · Wed, 21 Sep 2016 15:38:38 +0200

Hi all,

I have a (EPICS 3.14) CAS application that provides a variable-sized array of
UInt8.  Unfortunately, I fail to tell the CA client that the array size has
changed. All clients are stuck with the array size they receive when they
first connect.

On the server side, I have:
casEventMask select(getCAS()->valueEventMask() | getCAS()->logEventMask());
select |= getCAS()->propertyEventMask();
m_value->dump();
postEvent(select, *m_value);

The dump correctly reflects the new size:
----------dump This=0x89d3b8---------
 dimension=1 app-type=16 Atomic
 prim-type=aitUint8(aitEnumUint8)
 20 values=<
0x76 0x45 0x65 0x52 0x78 0x50 0x4c 0x39 0x33 0x31 0x74 0x71 0x37 0x37 0x59 0x34 0x65 0x55 0x71 0x58 >
 ref-count=2
 total-bytes=336, data-size=256, element-count=256
 destructor=NULL
 (0) 0x8a0b90 first=0 count=256
 LocalDataFormat NetworkDataFormat
-------------------------------------
----------dump This=0x89d400---------
 dimension=1 app-type=16 Atomic
 prim-type=aitUint8(aitEnumUint8)
 20 values=<
0x47 0x49 0x46 0x38 0x39 0x61 0x29 0x00 0x19 0x00 0xf7 0x00 0x00 0x00 0x00 0x00 0x00 0xe7 0x00 0x42 >
 ref-count=2
 total-bytes=1280, data-size=1199, element-count=1199
 destructor=NULL
 (0) 0x8a0b98 first=0 count=1199
 LocalDataFormat NetworkDataFormat
-------------------------------------

and clients always receive the correct length for their initial values.

From debug outputs I know that PV::maxBound(unsigned) is not called when
the length changes.

Is it possible to post an event to have a client (I tried camonitor and CSS)
update the stored length information?

Thanks,
Michael
-- 
Dr. Michael Ritzert                   Tel: +49 621 181 2883
Schaltungstechnik und Simulation      Fax: +49 621 181 2734
Technische Informatik, Uni Heidelberg [email protected]
68131 Mannheim, Germany               http://sus.ziti.uni-heidelberg.de

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System