Re: Avoid use deprecated Windows Memory API

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От Daniel Gustafsson
Тема Re: Avoid use deprecated Windows Memory API
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Msg-id AC3BDF40-9C88-4FB4-AAC0-FA99C266B3AD@yesql.se
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Ответ на Re: Avoid use deprecated Windows Memory API  (Alvaro Herrera <alvherre@alvh.no-ip.org>)
Ответы Re: Avoid use deprecated Windows Memory API  (Ranier Vilela <ranier.vf@gmail.com>)
Список pgsql-hackers
> On 15 Sep 2022, at 15:13, Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
>
> On 2022-Sep-15, Ranier Vilela wrote:
>
>> Em qui., 15 de set. de 2022 às 09:50, Alvaro Herrera <
>> alvherre@alvh.no-ip.org> escreveu:
>
>>> These functions you are patching are not in performance-sensitive code,
>>> so I doubt this makes any difference performance wise.  I doubt
>>> Microsoft will ever remove these deprecated functions, given its history
>>> of backwards compatibility, so from that perspective this change does
>>> not achieve anything either.
>>
>> If users don't adapt to the new API, the old one will never really expire.
>
> If you are claiming that Microsoft will remove the old API because
> Postgres stopped using it, ... sorry, no.

Also, worth noting is that these functions aren't actually deprecated.  The
note in the docs state:

    The local functions have greater overhead and provide fewer features
    than other memory management functions.  New applications should use
    the heap functions unless documentation states that a local function
    should be used.

And following the bouncing ball into the documentation they refer to [0] I read
this:

    As a result, the global and local families of functions are equivalent
    and choosing between them is a matter of personal preference.

--
Daniel Gustafsson        https://vmware.com/

[0]: https://docs.microsoft.com/en-us/windows/win32/memory/global-and-local-functions


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