Experimental Physics and
Industrial Control System

Ben Franksen <[email protected]> · Mon, 15 Nov 2010 22:58:17 +0100

Hi Jeff

thanks, this all confirms what I thought to be true.

One remark:

> One reason why the sequencer might have preserved the ca_poll
> (ca_pend_event) polling might have been to make one code base support
> both R3.14 and R3.13, but one could easily add an ifdef to enable
> spawning a polling thread only if its R3.13; they will of course need
> to compile two different object code versions if they will have
> support for both R3.13 and R3.14 at the same site.

The current code unconditionally initializes CA with

  ca_context_create(ca_enable_preemptive_callback)

and I don't believe this call has been available in 3.13. Anyway, the 
code cannot be compiled with 3.13 as all the Makefiles use the 3.14 
build system, and even if they were not I would readily drop support 
for 3.13 in the new release. No one (especially no one who still uses 
3.13) is in any way forced to upgrade to the new sequencer version.

Cheers
Ben

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System