From be9e34722f521608a24a0d00e6991913bbad835a Mon Sep 17 00:00:00 2001
From: Harshil <37377066+harshil21@users.noreply.github.com>
Date: Wed, 3 Nov 2021 12:49:53 +0400
Subject: Use single worker if importing `multiprocessing.synchronize` fails
 (#5238)

* add test import for multiprocessing.synchronize

Co-authored-by: Jacob Walls <jacobtylerwalls@gmail.com>
---
 CONTRIBUTORS.txt      | 2 ++
 ChangeLog             | 5 +++++
 doc/whatsnew/2.12.rst | 5 +++++
 pylint/lint/run.py    | 1 +
 4 files changed, 13 insertions(+)

diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index fa78fc987..773c1b70a 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -574,3 +574,5 @@ contributors:
 * Ikraduya Edian: contributor
 
 * Antonio Quarta (sgheppy): contributor
+
+* Harshil (harshil21): contributor
diff --git a/ChangeLog b/ChangeLog
index 7beac30fa..c0ab85265 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -135,6 +135,11 @@ Release date: TBA
 
   Closes #3370
 
+* The ``--jobs`` parameter now fallbacks to 1 if the host operating system does not
+  have functioning shared semaphore implementation.
+
+  Closes #5216
+
 
 What's New in Pylint 2.11.2?
 ============================
diff --git a/doc/whatsnew/2.12.rst b/doc/whatsnew/2.12.rst
index 95bdac0db..7fbb4ab71 100644
--- a/doc/whatsnew/2.12.rst
+++ b/doc/whatsnew/2.12.rst
@@ -134,3 +134,8 @@ Other Changes
   explicit typing
 
   Closes #5222
+
+* The ``--jobs`` parameter now falls back to 1 if the host operating system does not
+  have functioning shared semaphore implementation.
+
+  Closes #5216
diff --git a/pylint/lint/run.py b/pylint/lint/run.py
index 22c3dd14f..46710dc2b 100644
--- a/pylint/lint/run.py
+++ b/pylint/lint/run.py
@@ -13,6 +13,7 @@ from pylint.utils import print_full_documentation, utils
 
 try:
     import multiprocessing
+    from multiprocessing import synchronize  # noqa pylint: disable=unused-import
 except ImportError:
     multiprocessing = None  # type: ignore
 
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