Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov> · Fri, 10 Jun 2022 07:53:19 -0700

On 6/9/22 10:43, Madden, Timothy J. via Tech-talk wrote:

In pvData, we have PVStructures which I guess define data structures, and Structures which have something to do with introspection.

What exactly is the difference? In the docs, there is no real explanation of why we need both types, and what the difference is. Can one convert one to the other? Can someone explain this in a sentence or two?

In the PVXS library, the equivalents of Structure and PVStructure are named TypeDef and Value.

Does this help?

I have been writing pvData code that works, but only by following examples, and not really understanding the point of Structure vs PVStructure.

You are not alone.  I would advise starting with PVXS.  From the feedback I've had so far,
it is easier to pick up.

https://mdavidsaver.github.io/pvxs/example.html#shortest-server

https://mdavidsaver.github.io/pvxs/overview.html#comparison-with-pvaccesscpp

https://mdavidsaver.github.io/pvxs/value.html

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System