RFR: 8220240: Refactor shared dirty card queue

[Thomas Schatzl]

Hi Kim,

On Tue, 2019-03-12 at 15:06 -0400, Kim Barrett wrote:
> > On Mar 12, 2019, at 9:30 AM, Thomas Schatzl <
> > thomas.schatzl at oracle.com> wrote:
> > 
> > On Fri, 2019-03-08 at 19:20 -0500, Kim Barrett wrote:
> > > 
> > > CR:
> > > https://bugs.openjdk.java.net/browse/JDK-8220240
> > > 
> > > Webrev:
> > > http://cr.openjdk.java.net/~kbarrett/8220240/open.00/
> > > 
> > > I'll update copyrights before pushing.
> > 
> > Some very minor issues:
> > 
> > - g1DirtyCardQueue.hpp:70:71: superfluous linebreaks
> > 
> > - please add a sentence/comment what G1SharedDirtyCardQueue is at
> > the declaration.
> > 
> > Looks good otherwise. Do not need to re-review these changes.
> > 
> > Thanks,
> >  Thomas
> 
> Thanks.
> 
> I added the following comments:
> 
> +// A dirty card queue providing thread-safe enqueue.  A shared 
> +// global instance can be used for cases where a thread-local dirty
> +// card can't be used.
>  class G1SharedDirtyCardQueue {
> 
> and
> 
> +  // Thread-safe addition to shared logging buffer.
>    void enqueue(void* card_ptr);
> 

Thanks! Looks good.

Thomas