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# Copyright 2011 Justin Santa Barbara
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
import shutil
import tempfile
import eventlet
from eventlet import greenpool
from oslotest import base as test_base
from oslo_concurrency import lockutils
class TestFileLocks(test_base.BaseTestCase):
def test_concurrent_green_lock_succeeds(self):
"""Verify spawn_n greenthreads with two locks run concurrently."""
tmpdir = tempfile.mkdtemp()
try:
self.completed = False
def locka(wait):
a = lockutils.InterProcessLock(os.path.join(tmpdir, 'a'))
with a:
wait.wait()
self.completed = True
def lockb(wait):
b = lockutils.InterProcessLock(os.path.join(tmpdir, 'b'))
with b:
wait.wait()
wait1 = eventlet.event.Event()
wait2 = eventlet.event.Event()
pool = greenpool.GreenPool()
pool.spawn_n(locka, wait1)
pool.spawn_n(lockb, wait2)
wait2.send()
eventlet.sleep(0)
wait1.send()
pool.waitall()
self.assertTrue(self.completed)
finally:
if os.path.exists(tmpdir):
shutil.rmtree(tmpdir)
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