Experimental Physics and
Industrial Control System

Ben Franksen via Core-talk <core-talk at aps.anl.gov> · Wed, 10 Mar 2021 17:35:39 -0000

I am not sure I understand what you mean with "borrowed". IIUC there is nothing like that going on. You can have the value as a copy (dbfl_type_val) or as a reference (dbfl_type_ref). As I see it, the reference can be

1. owned by the record
2. owned the db_field_log

Originally I thought that 2 coincides with db_field_log having made a copy and thus having a dtor. For normal fields this is true. But info items are immutable, so there is no need to make a copy. There is also no need to to lock the record. And there is no need to query teh record for things like the current number of elements.

If there were guaranteed immutable record fields, the same would hold.
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System