[threadpool] Add new port

[jesseschalken]

Adds a port for the threadpool library.

Fixes #9735

[msftclas]

All CLA requirements met.

[jesseschalken]

What is the actual failure from CI? The only information it says is:

|x86-windows|result|features|notes
|-----------|----|--------|-----
|threadpool |Fail|core|Test passes in baseline but fails in current run. If expected update ci.baseline.txt with 'threadpool:x86-windows=fail'

The following build failures were ignored: openmama x264 3fd

Uncompressing archives\fail\3d\3d131b502c7b4949811c898bbc27864ce567f359.zip to C:\agent\_work\1\a\failureLogs\x86-windows\
##[error]REGRESSION: threadpool:x86-windows. If expected, add threadpool:x86-windows=fail to C:\agent\_work\1\s\scripts\ci.baseline.txt.
##[section]Finishing: Analyze results and prepare test logs

But what is the actual failure? It doesn't say.

I've tried using this library on the x86-windows triplet and it works fine.

[Neumann-A]

-- Downloading https://downloads.sourceforge.net/project/threadpool/threadpool/0.2.5%20%28Stable%29/threadpool-0_2_5-src.zip...
-- Downloading https://downloads.sourceforge.net/project/threadpool/threadpool/0.2.5%20%28Stable%29/threadpool-0_2_5-src.zip... Failed. Status: 7;"Couldn't connect to server"
CMake Error at scripts/cmake/vcpkg_download_distfile.cmake:175 (message):
      
      Failed to download file.
      If you use a proxy, please set the HTTPS_PROXY and HTTP_PROXY environment
      variables to "https://user:password@your-proxy-ip-address:port/".
      Otherwise, please submit an issue at https://github.com/Microsoft/vcpkg/issues

Call Stack (most recent call first):
  ports/threadpool/portfile.cmake:2 (vcpkg_download_distfile)
  scripts/ports.cmake:90 (include)

[Neumann-A]

Probably should print a warning that the this implementation is not NUMA aware ;) and will only support <64 logical cores on windows

[jesseschalken]

@Neumann-A Thanks. I force pushed an identical commit to retrigger the CI because I thought it might be an intermittent network failure.

And still, the file downloads fine for all the triplets except x86-windows. It's literally the same URL. I don't understand how that's possible.

The file downloads fine here via the browser and via vcpkg install threadpool --triplet x86-windows.

How do I even debug this?

[NancyLi1013]

Is this a header-only library? It seems just some headers are added.

[jesseschalken]

@NancyLi1013 Yep, this library is header-only.

[jesseschalken]

So how do I mark the requested review changes as accepted and remove the requires:author-response label?

[NancyLi1013]

@jesseschalken

Sorry for the late response.

The labels can only be removed by our team members. We will remove it if there are no any changes needed to be done.

[jesseschalken]

@NancyLi1013 Okay, thanks.

[NancyLi1013]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[ras0219-msft]

Thanks!

[jesseschalken]

I don't need this anymore personally because the code that used this library turned out to be unreachable. 😣 Maybe someone else will find it useful though.