Hi Collin,
> Does the get_windows_boot_time () not work on Native Windows? The
> Mingw and MSVC actions fail it.
There's apparently a difference between a full installation of
Windows 10 and the image that they use in the Microsoft Azure cloud.
> I'm thinking that it could be implemented using GetTickCount64 ().
Good point. You can see in lib/boot-time-aux.h that we have
implementations that are stable across suspend/resume and
fallback implementations that don't have this guarantee. Since a CI
machine is never suspended/resumed, this fallback would be useful.
> The Windows documentation says [1]:
>
> Retrieves the number of milliseconds that have elapsed since the
> system was started.
>
> So I'm thinking that should fix the issue.
Yes, it should be usable for the fallback.
> What Windows versions does Gnulib care about? Apparently this one only
> exists on Vista and later. [1]
The longer the API is available, the better. Gnulib supports
Windows XP as the minimum. For modules used by Emacs ('boot-time' in
particular) it should run even on Windows 2000.
Which means that the code needs to fetch a pointer to the particular
Windows API function at runtime, through GetProcAddress. See lib/isatty.c
as an example.
Would you like to give it a try?
Bruno
> [1]
> https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-gettickcount64
