RFR: 8264502: (fc) FileDispatcherImpl.setDirect0 might return uninitialized variable on some platforms [v2]

[Christoph Göttschkes]

On Thu, 1 Apr 2021 10:00:05 GMT, Michael McMahon <michaelm at openjdk.org> wrote:

>> Christoph Göttschkes has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Updated copyright dates.
>
> Strange there isn't a compiler warning to catch that.

Thanks for the reviews.

There is a compiler warning about this. But the code path is never exercised by a compiler for any of the supported target platforms. Only on systems, which neither define O_DIRECT, F_NOCACHE, nor DIRECTIO_ON, this code path is actually compiled.
I found this while playing around with a new internal port.

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PR: https://git.openjdk.java.net/jdk/pull/3284