RFR: 8234796: Refactor Handshake::execute to take a HandshakeOperation

[Robbin Ehn]

Hi all, please review.

Here is the result after Per's suggestion:
http://cr.openjdk.java.net/~rehn/8234796/v2/full/webrev/index.html
(incremental made no sense)

Due to circular dependency between thread.hpp and handshake.hpp, I moved the
ThreadClosure to iterator.hpp, as was suggested offline.

Passes t1-3

Thanks, Robbin

On 11/26/19 2:07 PM, Robbin Ehn wrote:
> Hi all, please review.
> 
> Issue:
> https://bugs.openjdk.java.net/browse/JDK-8234796
> Code:
> http://cr.openjdk.java.net/~rehn/8234796/full/webrev/
> 
> The handshake code needs more information about the handshake operation.
> We change type from ThreadClosure to HandshakeOperation in Handshake::execute.
> This enables us to add more details to the HandshakeOperation as needed going 
> forward.
> 
> Tested t1 and t1-3 together with the logging improvements in 8234742.
> 
> It was requested that "HandshakeOperation()" would take the name instead having 
> "virtual const char* name();". Which is in this patch.
> 
> Thanks, Robbin