RFR: 8296024: Usage of DIrectBuffer::address should be guarded [v13]

[Per Minborg]

On Thu, 24 Nov 2022 11:58:12 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> Separately, also (optional) stylistic: the indenting on this and following class is a bit odd. There is a certain tendency to compress lines - e.g. to reach for one-liners, when in reality the body is not that trivial. If I were to write the code I'd insert a newline after the `{` and I'd also break apart initialization (e.g. no two statements separated by `;` in the same line).
>> 
>> Also, I noted that you start the body of the record (e.g. `{`) on a new line, which I also find odd.
>
> (to be clear, some of the above comments refer to the code that was already there before your changes)

I also found the above as a bit odd but tried to stick with the existing implementation and style as much as possible.

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PR: https://git.openjdk.org/jdk/pull/11260