RFR: 8080879: Remove AbstractGangTask::set_for_termination

[Kim Barrett]

On May 22, 2015, at 10:19 AM, Stefan Karlsson <stefan.karlsson at oracle.com> wrote:
> 
> Hi all,
> 
> AbstractGangTask::set_for_termination(uint active_workers) is a virtual function that sub-classes can override to run setup code before the task is started. The active_workers parameter tells the task how many workers are going to execute the task.
> 
> Only a few tasks use this infrastructure and most tasks run the setup code in the constructor or before the task is constructed. There is no place where we construct a FlexibleGangTask task, change the number of active workers, and then start the task. The tasks are always started near the construction site. So, I propose that we get rid of AbstractGangTask::set_for_termination to shrink the AbstractGangTask API.
> 
> I didn't want to change how the CMS worker threads are started, so I moved AbstractGangTask::set_for_termination to YieldingFlexibleGangTask.
> 
> http://cr.openjdk.java.net/~stefank/8080879/webrev.00/
> https://bugs.openjdk.java.net/browse/JDK-8080879
> 
> Thanks,
> StefanK

Looks good.