RFR: 7902982: jcstress: Add samples for some mutex algorithms [v3]

[Aleksey Shipilev]

On Tue, 29 Jun 2021 14:32:50 GMT, Michael Mirwaldt <github.com+6693355+mmirwaldt at openjdk.org> wrote:

>> That's an interesting idea. If I get you right, you use here the fact that incrementing v is not an atomic operation. I guess it works because if both actors enter the critical section at the same time, they will both read 0 for v and increment it to 1 for their results.
>
> I will replace the taken1 and taken2 by this solution here.

Yes, that's basically something that https://github.com/openjdk/jcstress/blob/master/jcstress-samples/src/main/java/org/openjdk/jcstress/samples/api/API_01_Simple.java tests. It is known to show concurrent conflicts well.

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PR: https://git.openjdk.java.net/jcstress/pull/85