RFR: 8281626: NonblockingQueue should use nullptr

Fri Feb 11 09:09:10 UTC 2022

On Fri, 11 Feb 2022 06:42:40 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Please review this change to use nullptr instead of NULL throughout the NonblockingQueue class.
>> 
>> Testing:
>> mach5 tier1
>
> Looks fine!

Thanks @shipilev and @dholmes-ora for reviews.  I waffled about suggesting it's trivial; I'll take your suggestion, and go ahead and push now.

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PR: https://git.openjdk.java.net/jdk/pull/7438