Experimental Physics and
Industrial Control System

"Dmitry Yu. Bolkhovityanov via Tech-talk" <tech-talk at aps.anl.gov> · Fri, 25 Mar 2022 12:53:17 +0700 (+07)

Dear EPICS experts,

I'm trying to add Portable Channel Access Server (libcas) to an existing

application. The main part of work is straightforward, thanks to "Channel

Access Portable Server Application Interface (API) Tutorial" at

https://epics.anl.gov/extensions/cas/CAS_Tutorial.pdf

and "Channel Access Portable Server: Reference Guide" at
https://epics.anl.gov/extensions/cas/CAS_Reference.pdf

However, I can't find a way to integrate libcas file descriptor

management (which is implemented by fdManager) with application's native

main loop (which is select()-based). The only recipe I found is to call

fileDescriptorManager.process() periodically.

The question is: do fdManager/libcas include a functionality similar to

CA's ca_add_fd_registration(), for it to be able to register its file

descriptors directly with application's main loop?

(And, probably, a similar API for timeouts?)

Or is periodic calling fileDescriptorManager.process(0) the only way?

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System