os.cpu_count doesn't work on VxWorks RTOS

[pxinwr]

BPO	41440
Nosy	@terryjreedy, @pmp-p, @corona10, @pxinwr
PRs	#21685

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2020-08-07.05:22:17.373>
created_at = <Date 2020-07-30.07:07:44.020>
labels = ['type-feature', 'library', '3.10']
title = "os.cpu_count doesn't work on VxWorks RTOS"
updated_at = <Date 2020-08-07.05:22:17.372>
user = 'https://github.com/pxinwr'

bugs.python.org fields:

activity = <Date 2020-08-07.05:22:17.372>
actor = 'corona10'
assignee = 'none'
closed = True
closed_date = <Date 2020-08-07.05:22:17.373>
closer = 'corona10'
components = ['Library (Lib)']
creation = <Date 2020-07-30.07:07:44.020>
creator = 'pxinwr'
dependencies = []
files = []
hgrepos = []
issue_num = 41440
keywords = ['patch']
message_count = 4.0
messages = ['374601', '374692', '374793', '374973']
nosy_count = 4.0
nosy_names = ['terry.reedy', 'pmpp', 'corona10', 'pxinwr']
pr_nums = ['21685']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue41440'
versions = ['Python 3.10']

[pxinwr]

Now os.cpu_count() always returns NONE on VxWorks RTOS. It needs to be fixed particularly for VxWorks.

[terryjreedy]

Do you know if any core devs have experience with VxWorks? It is not even listed in https://devguide.python.org/experts/#platforms.

[pxinwr]

I don't know who have VxWorks experience in core devs. VxWorks has not been officially supported so not listed there. I am from Wind River and Wind River can provide buildbot for VxWorks once it is supported and I also could take the maintainer role.

[corona10]

New changeset 3405e05 by pxinwr in branch 'master':
bpo-41440: add os.cpu_count() support for VxWorks RTOS (GH-21685)
3405e05