RFR (S) 8183229: Implement WindowsSemaphore::trywait

[Claes Redestad]

Hi,

On 06/29/2017 02:50 PM, Mikael Gerdin wrote:
> Hi all,
>
> To help with some upcoming patches I'd like to add the trywait 
> operation to the platform-independent Semaphore class. It's currently 
> lacking a Windows-implementation.
>
> Testing: JPRT testing on Windows platforms
> Webrev: http://cr.openjdk.java.net/~mgerdin/8183229/webrev.0/

looks good!

/Claes