Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 20 Apr 2016 11:18:50 -0500

Hi Mike,

On 04/20/2016 09:05 AM, Michael Westfall wrote:
> Is there a tutorial or example somewhere that could help me understand
> how to convert a driver to use the EPICS registry in place of the
> vxWorks symLib?

Can you give a bit more information about what symbols this driver is
looking up?

The EPICS registry isn't really a general-purpose symbol table, any
symbol that needs to be found using it must first have been registered,
usually in a C++ static constructor. It is possible to add your own
symbol types if you need that (see registry.h; a registryID is just any
pointer which must be the same for both registration and lookup).

You might want to take a look at the epicsFindSymbol.h API in libCom
which provides a generic API to any underlying OS symbol table; this
might be sufficient for your purposes, although some OSs might not be
able to support it (implementations are provided for VxWorks, Linux,
solaris, Darwin and Windows).

HTH,

- Andrew

-- 
There are only two hard problems in distributed systems:
  2. Exactly-once delivery
  1. Guaranteed order of messages
  2. Exactly-once delivery
 -- Mathias Verraes

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System