Re: Avoid use deprecated Windows Memory API
От | Ranier Vilela |
---|---|
Тема | Re: Avoid use deprecated Windows Memory API |
Дата | |
Msg-id | CAEudQAp57HtShUY3wiw-k3DROx9Ncm4JbbHJAUEpWQydAQB1+w@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Avoid use deprecated Windows Memory API (Aleksander Alekseev <aleksander@timescale.com>) |
Список | pgsql-hackers |
Em qui., 15 de set. de 2022 às 09:58, Aleksander Alekseev <aleksander@timescale.com> escreveu:
Hi Ranier,
> use HeapAlloc instead, once LocalAlloc is an overhead wrapper to HeapAlloc.
Thanks for the patch.
Although MSDN doesn't explicitly say that LocalAlloc is _depricated_
+1 for replacing it.
The MSDN says:
" New applications should use the heap functions".
IMO Postgres 16, fits here.
I agree with Alvaro that it is unlikely to be
ever removed, but this is a trivial change, so let's keep the code a
bit cleaner. Also I agree that no benchmarking is required for this
patch since the code is not performance-sensitive.
In no time, the patch claims performance.
So much so that the open CF is in refactoring.
> These calls are not equal, the LocalAlloc calls zeroes out the allocated memory
I took a look. The memory is initialized below by InitializeAcl() /
GetTokenInformation() [1][2] so it seems we are fine here.
The patch didn't have a proper commit message and had some issues with
the formating. I fixed this. The new code checks the return value of
GetProcessHeap() which is unlikely to fail, so I figured unlikely() is
appropriate:
+ hDefaultProcessHeap = GetProcessHeap();
+ if (unlikely(hDefaultProcessHeap == NULL))
The corrected patch is attached.
Thanks for the review and fixes.
regards,
Ranier Vilela
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