Experimental Physics and Industrial Control System
Subject: |
What is void* puser in ca_create_channel |
From: |
Florian Feldbauer <[email protected]> |
To: |
EPICS tech talk <[email protected]> |
Date: |
Thu, 29 Mar 2012 12:01:06 +0200 |
Dear all,
I currently write a CA Client that should monitor all measured
temperatures in my experiment
to regulate the chillers.
This is my first try to program a CA Client, and I have a question
concerning this:
The ca_create_channel and the ca_create_subscription methods both have
a parameter void* puser. How does this parameter have to look like?
Can I use a C-Struct with any member I want to have (even members which
are not
for the CA, but for another part of my program)? Are there any members
which are mandatory? (like value or chid)
In the camonitor.c example generated with makeBaseApp.pl this puser is
just a pointer to a C-Struct containing
a c-string value, the chid and evid of the channel.
Best regards,
Florian
--
-------------------------------------
| Florian Feldbauer |
| Ph.D. student |
| |
| Institut für Experimentalphysik I |
| Ruhr-Universität Bochum |
| Universitätsstr. 150 |
| D-44780 Bochum |
| |
| Office: NB 2/173 |
| Phone: (+49)234 / 32-23538 |
| Fax: (+49)234 / 32-14170 |
| Web: http://www.ep1.rub.de |
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