RFR: 8201327: Make Sensor deeply immutably thread safe

[Martin Buchholz]

On Mon, Apr 9, 2018 at 1:25 PM, Chris Hegarty <chris.hegarty at oracle.com>
wrote:

>
> > On 9 Apr 2018, at 20:31, Alan Bateman <Alan.Bateman at oracle.com> wrote:
> >
> >> On 09/04/2018 18:54, Martin Buchholz wrote:
> >> Another little cleanup to make Google's race detector happy.
> >>
> >> 8201327: Make Sensor deeply immutably thread safe
> >> http://cr.openjdk.java.net/~martin/webrevs/jdk/Sensor-init/ <
> http://cr.openjdk.java.net/%7Emartin/webrevs/jdk/Sensor-init/>
> >> https://bugs.openjdk.java.net/browse/JDK-8201327
> >>
> > This looks okay to me,
>
> +1
>
> > except maybe the "initially false" and "initially 0" comments as they
> are just documenting the default values and don't add anything.
>
> Yeah, I’ve done this before too, especially when removing default values (
> as if to prevent them from inadvertently creeping back in ).
>

If only there was standard concise wording for "intentionally using the
field's default value, which is slightly more efficient and slightly more
theoretically thread-safe, even though slightly less readable" ...

// VM-initialized to false
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