RFR (S) 8183229: Implement WindowsSemaphore::trywait

[Kim Barrett]

> On Jul 3, 2017, at 3:53 AM, Mikael Gerdin <mikael.gerdin at oracle.com> wrote:
> 
> Just realized I didn't send this to the list!
> /m

Looks good.

> 
> On 2017-06-30 10:56, Mikael Gerdin wrote:
>> Hi Kim
>> On 2017-06-30 02:01, Kim Barrett wrote:
>>>> On Jun 29, 2017, at 8:50 AM, Mikael Gerdin <mikael.gerdin at oracle.com> 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/
>>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8183229
>>>> 
>>>> Thanks
>>>> /Mikael
>>> 
>>> Code looks good, but needs a test for the new function in hotspot/test/native/runtime/test_semaphore.cpp.
>> Oh! Of course!
>> How about:
>> http://cr.openjdk.java.net/~mgerdin/8183229/webrev.0_to_1/
>> http://cr.openjdk.java.net/~mgerdin/8183229/webrev.1/
>> I've run the unit test on all JRPT platforms.
>> /Mikael