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Re: svn commit: r1841078 - in /apr/apr/trunk: CHANGES apr.dsp atomic/unix/builtins64.c atomic/unix/mutex64.c atomic/win32/apr_atomic64.c include/apr_atomic.h include/arch/unix/apr_arch_atomic.h test/testatomic.c


On 17 Sep 2018, at 20:54, Yann Ylavic <ylavic.dev@xxxxxxxxx> wrote:

> How about 128bit? :p
> 
> There are __int128 (gcc) and _m128 (MSVC) and most 64bit intel/amd
> CPUs support cmpxchg16b.
> Intrinsics work on gcc, and (eg.) _InterlockedCompareExchange128 on Windows.
> 
> This can be very useful to avoid the ABA problem when doing atomics
> with 64bit pointers.
> For instance, MPM event could benefit from that (see PR 62141)...

While we’re here we should do this, +1.

Regards,
Graham
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