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[3.13] gh-110206: Fix multiprocessing test_notify_all (GH-130933) #130950

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Merged
merged 1 commit into from
Mar 7, 2025
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[3.13] gh-110206: Fix multiprocessing test_notify_all (GH-130933) #130950

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17 changes: 12 additions & 5 deletions Lib/test/_test_multiprocessing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1649,18 +1649,19 @@ def test_notify_all(self):
woken = self.Semaphore(0)

# start some threads/processes which will timeout
workers = []
for i in range(3):
p = self.Process(target=self.f,
args=(cond, sleeping, woken, TIMEOUT1))
p.daemon = True
p.start()
self.addCleanup(p.join)
workers.append(p)

t = threading.Thread(target=self.f,
args=(cond, sleeping, woken, TIMEOUT1))
t.daemon = True
t.start()
self.addCleanup(t.join)
workers.append(t)

# wait for them all to sleep
for i in range(6):
Expand All @@ -1679,12 +1680,12 @@ def test_notify_all(self):
p = self.Process(target=self.f, args=(cond, sleeping, woken))
p.daemon = True
p.start()
self.addCleanup(p.join)
workers.append(p)

t = threading.Thread(target=self.f, args=(cond, sleeping, woken))
t.daemon = True
t.start()
self.addCleanup(t.join)
workers.append(t)

# wait for them to all sleep
for i in range(6):
Expand All @@ -1700,11 +1701,17 @@ def test_notify_all(self):
cond.release()

# check they have all woken
self.assertReachesEventually(lambda: get_value(woken), 6)
for i in range(6):
woken.acquire()
self.assertReturnsIfImplemented(0, get_value, woken)

# check state is not mucked up
self.check_invariant(cond)

for w in workers:
# NOTE: join_process and join_thread are the same
threading_helper.join_thread(w)

def test_notify_n(self):
cond = self.Condition()
sleeping = self.Semaphore(0)
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