RFR(M): 8048521 - Remove obsolete code from os_windows.cpp/hpp

[Coleen Phillimore]

Nice cleanup!  Looks good.

Coleen

On 12/21/15 7:18 AM, Christian Tornqvist wrote:
> Hi everyone,
>
>   
>
> Please review this change that removes a lot of obsolete code from
> os_windows.cpp/hpp and related files. Changes include:
>
>   
>
> *         Remove is_nt() check and dead code related to it
>
> *         Remove win32::__has_performance_count() and related dead code
> since the MSDN page for QueryPerformanceFrequency says: "On systems that run
> Windows XP or later, the function will always succeed and will thus never
> return zero."
>
> *         Remove the check for API's that are always present in all our
> supported Windows versions
>
>   
>
> Webrev:
>
> http://cr.openjdk.java.net/~ctornqvi/webrev/8048521/webrev.00/
>
>   
>
> Bug:
>
> https://bugs.openjdk.java.net/browse/JDK-8048521
>
>   
>
> Change was tested on Windows 32/64-bit using
> hotspot/test/:hotspot_all,jdk/test/:tier1,jdk/test/:tier2
>
>   
>
> Thanks,
>
> Christian
>