RFR: 8252324: Signal related code should be shared among POSIX platforms

[Gerard Ziemski]

On Thu, 24 Sep 2020 15:07:43 GMT, Gerard Ziemski <gziemski at openjdk.org> wrote:

>> I believe the reason for not using POSIX semaphores was that it is not supported on as400 PASE which we don't support
>> in OpenJDK. I'm not aware of any problems when using this common POSIX code on AIX 7.2. Is SA supported on AIX? That
>> would be new to me. But I'm not an expert for these topics. I hope that Thomas can find some time to take a look.
>
> Reverted the last commit. Thank you for taking a look and testing - please let me know how it goes.
> 
> I have already tested this change here at Oracle a while ago, but I will do so once again...

Mach5 hs-tier1,2,3,4,5,6,7 testing looks good.

-------------

PR: https://git.openjdk.java.net/jdk/pull/157