[libcxx] r185451 - Windows support in thread::hardware_concurrency.

[Nico Rieck]

On 02.07.2013 19:53, Howard Hinnant wrote:
> +#elif defined(_WIN32)
> +    SYSTEM_INFO info;
> +    GetSystemInfo(&info);
> +    return info.dwNumberOfProcessors;
>   #else  // defined(CTL_HW) && defined(HW_NCPU)

I'm not that familiar with the implementation for the other platforms, 
but this snippet returns the number of logical processors. In my local 
Windows port I use the number of cores, as I think that's more 
appropriate. This is also what MSVCRT does on Windows.

-Nico