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

[Michael Mirwaldt]

On Tue, 29 Jun 2021 13:17:19 GMT, Michael Mirwaldt <github.com+6693355+mmirwaldt at openjdk.org> wrote:

>> jcstress-samples/src/main/java/org/openjdk/jcstress/samples/concurreny/mutex/Mutex_01_NoAlgorithm.java line 50:
>> 
>>> 48: @Outcome(expect = ACCEPTABLE, desc = "Both actors have entered the critical section whenever they wanted")
>>> 49: @State
>>> 50: public class Mutex_01_NoAlgorithm {
>> 
>> I think it would be great to add `SynchronizedAlgorithm` as well.
>> It would be the relevant middle-ground between `NoAltorithm` and `highly-sophisticated` Dekker/Peterson :)
>
> Yes, that's a good idea. I will do it.

I added a sample with an atomic boolean. However, all samples use busy waiting so far.
Do you wish to add samples which get blocked instead of  busy waiting?

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