RFR: 8266637: CHT: Add insert_and_get method

Tue May 11 10:08:21 UTC 2021

On Mon, 10 May 2021 09:08:36 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Hi all,
>> 
>> Please review this change to add an `insert_get` method to the CHT.  The method combines `insert()` and `get()` methods to decrease the amount of global synchronization needed for `get()` calls after an `insert` call. 
>> 
>> Testing: tier1-3
>
> Lgtm, but wait for a runtime team reviewer.

Thanks @tschatzl

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PR: https://git.openjdk.java.net/jdk/pull/3915