ps_cpu_count returning NA on Windows 10

[hongooi73]

Both with logical=TRUE and FALSE. This is with Win 10 Pro 1909, build 18383.

r$> ps::ps_cpu_count(TRUE)
[1] NA

r$> ps::ps_cpu_count(FALSE)
[1] NA

r$> sessionInfo()
R version 3.6.2 (2019-12-12)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18363)

Matrix products: default

locale:
[1] LC_COLLATE=English_Australia.1252  LC_CTYPE=English_Australia.1252
[3] LC_MONETARY=English_Australia.1252 LC_NUMERIC=C
[5] LC_TIME=English_Australia.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] pkgdepends_0.0.0.9006

loaded via a namespace (and not attached):
 [1] rstudioapi_0.9.0  rematch2_2.1.0    rappdirs_0.3.1    uuid_0.1-4
 [5] debugme_1.1.0     R6_2.4.1          rlang_0.4.5       fansi_0.4.0
 [9] tools_3.6.2       pkgbuild_1.0.6    lpSolve_5.6.15    pkgcache_1.0.6
[13] utf8_1.1.4        cli_2.0.2         withr_2.1.2       assertthat_0.2.1
[17] rprojroot_1.3-2   digest_0.6.23     tibble_2.1.3      crayon_1.3.4
[21] processx_3.4.2    zip_2.0.4         callr_3.4.2       vctrs_0.2.4
[25] ps_1.3.2          curl_4.3          glue_1.3.2        compiler_3.6.2
[29] pillar_1.4.3      desc_1.2.0        filelock_1.0.2    backports_1.1.5
[33] prettyunits_1.1.1 jsonlite_1.6.1    pkgconfig_2.0.3

[gaborcsardi]

I am on the same exact versions, and get the correct answers:

> ps::ps_cpu_count(TRUE)
[1] 8
> ps::ps_cpu_count(FALSE)
[1] 8

[gaborcsardi]

OK, this has to do with the ps binary package built on an older version of Windows. If you install the source package from CRAN, then in works.

[hongooi73]

Wow, good find. I wonder what a good long-term solution is? CRAN isn't going to have multiple binaries for different versions of Windows, I don't think. Also, how many other packages might be similarly affected?

[gaborcsardi]

The windows APIs are very stable, so I don't think this is a common thing. I am not even sure why it is happening, but I would need an old windows first to debug it.

[hongooi73]

Winbuilder runs Windows Server 2008, and Azure has images available for Server 2008 R2. Is that ok? I can spin up a VM for you if necessary.

[gaborcsardi]

R2 is not ok, because CRAN uses a plain 2008, I think. :( I have one on a VM.

But I need to submit ps now to fix a build issue on Solaris, so I'll have to come back to this later.

[gaborcsardi]

Maybe I can use a workaround on windows for now, I think I'll do that.