| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Melanie Plageman <melanieplageman(at)gmail(dot)com> |
| Cc: | Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
| Subject: | Re: Asynchronous and "direct" IO support for PostgreSQL. |
| Date: | 2021-07-30 19:52:31 |
| Message-ID: | 20210730195231.uaalr7f6lcxchmm4@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2021-07-30 15:35:30 -0400, Melanie Plageman wrote:
> * I think that having TBMIterateResult inside of TBMIterator is not
> well-defined C language behavior. In [1], it says
>
> "Structures with flexible array members (or unions who have a
> recursive-possibly structure member with flexible array member) cannot
> appear as array elements or as members of other structures."
> [1] https://en.cppreference.com/w/c/language/struct
I think it is ok as long as the struct with the flexible array member is
at the end of the struct it is embedded in. I think even by the letter
of the standard, but it's as always hard to parse...
Greetings,
Andres Freund
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