Experimental Physics and Industrial Control System
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Hi all,
I have an application which needs to read or write EPICS data whenever
something interesting happens with other EPICS data. The naive way would
be to do ca_get and/or ca_put inside a monitor callback function. But as
far as I remember, this is forbidden.
Is this (still) true? I cannot find anything about this in the Channel
Access Reference Manual.
If it is not (yet) possible, can this be implemented in a future release
of the channel access library? I think it is a common use case to "do
something when something else happened".
What is the best practice to do monitor triggered channel access at the
moment?
One way I can imagine is to setup a different thread blocking on an
event semaphore and release that semaphore from within the monitor
callback. But this involves thread save programming with all its
complications.
Dirk
- Replies:
- Re: ca_get and ca_put triggered by monitors? J. Lewis Muir
- RE: ca_get and ca_put triggered by monitors? Hill, Jeff
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ANJ, 20 Apr 2015 |
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