RFR: 8367013: Add Atomic<T> to package/replace idiom of volatile var plus AtomicAccess:: operations [v5]

[Stefan Karlsson]

On Wed, 22 Oct 2025 20:06:42 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> I don't know if I've said it here or only offline, so I post it here. I would have preferred if this patch retained the names from `AtomicAccess`. I don't think it would be problematic to understand that `var.xchg()` requires you to understand what `var` is. And if you know that `var` is an `Atomic` then you know what `var` is then this is no more confusing than a call to `AtomicAccess::xchg`. The same for `inc` and `dec`.
>
> Obviously, I disagree. I think using those names would be strictly (and
> noticeably) worse that what is currently proposed, and have explained why I
> think that.

Of course. I brought this up to show that one person has so far said that xchg is a bad name and two has said that they prefer to keep it.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27539#discussion_r2453941344