Add a Barrier object in asyncio lib

@asvetlov

BPO	43352
Nosy	@asvetlov, @1st1, @eamanu, @YvesDup
PRs	bpo-43352: Add a Barrier object in asyncio lib #24903

^{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 2022-03-25.22:02:23.486>
created_at = <Date 2021-03-01.11:39:56.345>
labels = ['3.11', 'type-feature', 'expert-asyncio']
title = 'Add a Barrier object in asyncio lib'
updated_at = <Date 2022-03-25.22:02:23.485>
user = 'https://github.com/YvesDup'

bugs.python.org fields:

activity = <Date 2022-03-25.22:02:23.485>
actor = 'asvetlov'
assignee = 'none'
closed = True
closed_date = <Date 2022-03-25.22:02:23.486>
closer = 'asvetlov'
components = ['asyncio']
creation = <Date 2021-03-01.11:39:56.345>
creator = 'yduprat'
dependencies = []
files = []
hgrepos = []
issue_num = 43352
keywords = ['patch']
message_count = 4.0
messages = ['387855', '392282', '396453', '416019']
nosy_count = 5.0
nosy_names = ['asvetlov', 'python-dev', 'yselivanov', 'eamanu', 'yduprat']
pr_nums = ['24903']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue43352'
versions = ['Python 3.11']

Add a synchronized primitive Barrier in asyncio, in order to be consistent with them we have for threading.

Barrier object will have a similar design from that of threading lib.
(May be we have to think about a backport ?)

Initial discussion started here: https://mail.python.org/archives/list/python-ideas@python.org/thread/IAFAH7PWMUDUTLXYLNSXES7VMDQ26A3W/

An update was submitted on PR.

Modified python files are:

file lib/asyncio/locks.py
file lib/test/test_asyncio/test_locks.py

And related documentation files

file Doc/library/asyncio-api-index.rst
file Doc/library/asyncio-sync.rst

Please, could you have a look ?

@eamanu

This last version includes the propositions, remarks from @asveltov and @eamanu

This PR is always stuck, so could you please approve the 3 running workflows ?

New changeset d03acd7 by Duprat in branch 'main':
bpo-43352: Add a Barrier object in asyncio lib (GH-24903)
d03acd7

Update 3.11.rst

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Add a Barrier object in asyncio lib #87518

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Add a Barrier object in asyncio lib #87518

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YvesDup commented on Mar 1, 2021

YvesDup commented on Apr 29, 2021

YvesDup commented on Jun 24, 2021

asvetlov commented on Mar 25, 2022

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