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

[Michael Mirwaldt]

On Tue, 29 Jun 2021 13:08:47 GMT, Vladimir Sitnikov <vsitnikov at openjdk.org> wrote:

>> mmirwaldt for openjdk has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   removed ids for forbidden outcomes
>
> jcstress-samples/src/main/java/org/openjdk/jcstress/samples/concurreny/mutex/Mutex_02_PetersonAlgorithm.java line 65:
> 
>> 63:         taken1 = true;
>> 64:         r.r1 = taken2;
>> 65:         taken1 = false;
> 
> What do you think of adding comments that show where the critical section starts and where it ends?
> It looks like 3 or 8 lines are inside the critical section, so adding begin-end comments would help.

That's funny because I had comments like "critical section starts" and "critical section ends" but I removed them because I thought you and Aleksey would consider them "noise". I will put them into the code again.

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