Experimental Physics and
Industrial Control System

<[email protected]> · Mon, 18 Jul 2011 14:11:45 +0000

From: Mark Rivers [mailto:[email protected]]
> Is one simple way to do it to have your function
> 
> void wait_for_epics_ready(void);
> 
> just poll waiting for interruptAccept=1?

Essentially, yes, I think so -- the entire purpose of wait_for_epics_ready() is to ensure I can generate I/O Intr events without losing them.  I wonder whether I should use initHookAfterInterruptAccept instead ... don't suppose it makes much difference.

On the other hand, I do have two problems with this:

1. Polling?  Eww.  In my particular example I guess it doesn't hugely matter, but it makes me queasy in general.

2. There's a more general interesting issue behind my question regarding OSI and events.

Hmm.  Well, I've written the code I've given, so I'll probably use it, but yes, polling during startup sounds perfectly sensible.

I see that there's a scanPause() function which can reset interruptAccept -- when does this get called?  I hope this isn't called normally!  (Scrabbling through the code suggests this is only called by iocPause(), which is just a command line debug hack, not for normal use, I hope...)

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System