RFR: 8369306: Implement invokeAndWait and finishTerminating on headless platform [v3]

[Johan Vos]

On Mon, 13 Oct 2025 16:32:48 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> generally speaking, when two threads modify a single boolean variable, there might be scenarios, depending on the exact hardware, when the other thread does not see the modified value right away.
>> 
>> some of the comments in 
>> 
>> https://stackoverflow.com/questions/65037547/the-volatile-keyword-and-cpu-cache-coherence-protocol
>> https://stackoverflow.com/questions/106591/what-is-the-volatile-keyword-useful-for
>> 
>> might explain it better.
>
> Can this variable be accessed by two threads where one of them doesn't synchronize some other way? If so, then Andy has a point.

I'm aware of the purpose of volatile :)
However, I'm also aware of the cost of volatile, hence I prefer not to do it unless I know there is a possible scenario where it is needed.
That is why I'm asking the same question as the one asked by Kevin.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1934#discussion_r2426851714