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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Changing record fields while PACT=1 |
| From: | Klemen Vodopivec via Tech-talk <[email protected]> |
| To: | [email protected] |
| Date: | Mon, 4 Feb 2019 10:03:22 -0500 |
Hi,for a new device support implementing IPMI bridge I'm exploring some design options. The easiest would be to kick-off asynchronous fetch when record starts processing and set PACT=1. When done, set PACT=0. In the mean time the asynchronous function would populate fields in the record. Because IPMI sensors have lots of metadata attached, fields like rec->hihi, rec->prec etc. would get populated as part of async operation.
Question is, is PACT=1 enough to ensure exclusive access to record fields? I know record won't process again but is there any EPICS db internals that will poke record while it's being processed?
Thanks, Klemen