Experimental Physics and
Industrial Control System

l7a <[email protected]> · Wed, 21 May 2003 17:43:29 -0500

Jeff,

Thanks you for answer about Multithread client. But I have some
questions again.

1. I don't feel difference between ca_pend_io() and ca_pend_event()
functions. In first moment I believe ca_pend_event() is used for
functions with callback. But ca_create_channel() uses callback but I
must 
use ca_pend_io() from documentation.

The documentation has only this mention for ca_pend_event()
=================
When ca_pend_event is invoked the send buffer is flushed and CA
background activity is processed for TIMEOUT seconds.
=================
All another ca_pend_event mentions in documentation are combained with
ca_pend_io, ca_flush_io.
Could you please drop some hints for newcoming?

2. I try to test clients in Windows. I saw when I started the simplest
program for few times I have problem. The program contains 
- init CA
- open channel
- close channel
- destroy CA
It works OK at once. But if I make loop I receive problem after ~10
circles in destroy function. I attach c file and bmp with screen. Could
you please glance to its? I use Epics 3.14.1 version.

3. Epics uses some strings. I can find MAX length for
#define MAX_UNITS_SIZE		8	- for engeniring unit label
#define MAX_STRING_SIZE 40 		- for string PV type
I don't see MAX length for Host, PV name strings. Are its dynamical? No
restriction?

Andrei.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System