RFR (S): 8228857: Refactor PlatformMonitor into PlatformMutex and PlatformMonitor

[David Holmes]

Hi Per,

Are you okay with the latest version of this change?

Thanks,
David

On 9/08/2019 4:25 pm, David Holmes wrote:
> Okay here is v2 with Kim's non-copyable adjustments and an alternate 
> approach to the "impl" class so that the PlatformMutex doesn't have to 
> pay for the unused pthread_cond_t. Trade-off in this scheme is that 
> PlatformMonitor now has two "impl" pointers so consumes more space.
> 
> Also made comment changes suggested by Dan.
> 
> http://cr.openjdk.java.net/~dholmes/8228857/webrev.v2/
> 
> Thanks,
> David
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