Using C++11+ in hotspot

[John Rose]

On Aug 6, 2018, at 9:54 PM, Martin Buchholz <martinrb at google.com> wrote:
> 
> I don't know what is actually being copied here, but can't the underlying
> type be atomic<address*> ?

Yes, if we are allowed to cast some random sequence of metadata
words to atomic<address*>[].  If that's the magic incantation to get
to the hardware's atomicity primitives, OK.  I suspect a more direct
technique may be needed, such as assembly code stubs.

— John
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