[fpc-devel] "Maybe Gareth can be convinced to spend his energy on this ... "

[Sven Barth]

George Bakhtadze <armorcavalry at yandex.com> schrieb am Sa., 29. Juni 2019,
09:32:

>
>
> This assumption is *not* incorrect. Only on the LLVM based Delphi NewGen
> and FPC's LLVM backend the assumption is incorrect which can be seen by
> them having added "volatile" mechanisms.
>
>
> I believe this assumption incorrect because it's not stated in
> documentation as correct.
> If FPC somehow guarantees that a global field (even only of simple types)
> can be atomically read and written from any thread for ANY platform that is
> a very strong guarantee and worth mention in documentation.
>

It does not guarantee atomicity and it's not mentioned in the
documentation, but the non-LLVM backends *always* reaccess global variables
- and there is enough code out there, both FPC and Delphi/TP that (ab)use
this so that it can be considered pseudo documented.

Regards,
Sven

>
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