Re: [PATCH] Use CC atomic builtins if available [was: Re: TAS patch for building on armel/armhf thumb]

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От Martin Pitt
Тема Re: [PATCH] Use CC atomic builtins if available [was: Re: TAS patch for building on armel/armhf thumb]
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Msg-id 20111219154108.GL2972@piware.de
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Ответ на Re: [PATCH] Use CC atomic builtins if available [was: Re: TAS patch for building on armel/armhf thumb]  (Tom Lane <tgl@sss.pgh.pa.us>)
Список pgsql-bugs
Tom Lane [2011-12-19 10:25 -0500]:
> Heikki Linnakangas <heikki.linnakangas@enterprisedb.com> writes:
> > On 19.12.2011 16:31, Robert Haas wrote:
> >> On Sun, Dec 18, 2011 at 5:42 PM, Martin Pitt<mpitt@debian.org>  wrote:
> >>> I agree. How about a patch like this? It uses builtin atomics if
> >>> available, and falls back to the custom implementations if not.
>
> >> -1.  Absent some evidence that gcc's implementations are superior to
> >> ours, I think we should not change stuff that works now.  That's
> >> likely to lead to subtle bugs that are hard to find and perhaps
> >> dependent on the exact compiler version used.
>
> > Ok, we're in disagreement on that then. I don't feel very strongly about
> > it, let's see what others think.
>
> I agree with Robert.  There is no evidence whatsoever that this would
> be an improvement, and unless somebody cares to provide such evidence,
> we shouldn't risk changing code that's so full of portability hazards.

OK, with you and Robert preferring this as a fallback instead of a
preferred way, and with Heikki's "I don't care much", I'll rework the
patch.

Thanks,

Martin
--
Martin Pitt                        | http://www.piware.de
Ubuntu Developer (www.ubuntu.com)  | Debian Developer  (www.debian.org)

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