Re: [HACKERS] Autovacuum launcher occurs error when cancelled bySIGINT

Thomas Munro wrote:

> I thought about this when designing the DSA API.  I couldn't think of
> any good reason to provide an 'am-I-already-attached?' function
> equivalent to dsm_find_mapping.  It seemed to me that the client code
> shouldn't ever be in any doubt about whether it's attached, and that
> wilfully or absent-mindedly throwing away dsa_area pointers and having
> to ask for them again doesn't seem like a very good design.  I suspect
> the same applies to dsm_find_mapping, and I don't see any callers in
> the source tree or indeed anywhere on the internet (based on a quick
> Google search).  But I could be missing something.

I think such an API call is potentially useful for things like assertion
checks, if nothing else.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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