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# Copyright (c) 2002-2011 IronPort Systems and Cisco Systems
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
"""Unittests for mutex."""
import coro
from coro.test import coro_unittest
import unittest
class Test(unittest.TestCase):
def test_mutex_interrupt_schedule(self):
"""Test interrupt then schedule on mutex."""
m = coro.mutex()
m.lock()
self._resume_count = 0
threads = []
# Spawn some threads that will block and be interrupted.
for unused in xrange(5):
threads.append(coro.spawn(self._mutex_block, m))
# Spawn a thread that we will not interrupt.
no_interrupt_thread = coro.spawn(self._mutex_block, m)
coro.yield_slice()
# Cause an interrupt on these threads.
for t in threads:
t.shutdown()
# Now try to get the non-interrupted thread to run.
m.unlock()
coro.yield_slice()
# Verify that it ran.
self.assertEqual(self._resume_count, 1)
def _mutex_block(self, m):
m.lock()
self._resume_count += 1
m.unlock()
def test_mutex_schedule_interrupt(self):
"""Test schedule then interrupt on mutex."""
m = coro.mutex()
m.lock()
self._resume_count = 0
threads = []
# Spawn some threads that will block and be interrupted.
for unused in xrange(5):
threads.append(coro.spawn(self._mutex_block, m))
# Spawn a thread that we will not interrupt.
no_interrupt_thread = coro.spawn(self._mutex_block, m)
coro.yield_slice()
# Schedule all of the threads.
m.unlock()
# Now interrupt them.
for t in threads:
t.shutdown()
coro.yield_slice()
# Verify that it ran.
self.assertEqual(self._resume_count, 1)
def test_ownership(self):
"""Test mutex ownership."""
m = coro.mutex()
m.lock()
t = coro.spawn(self._test_ownership, m)
coro.yield_slice()
self.assertTrue(m.has_lock())
self.assertFalse(m.has_lock(t))
self.assertTrue(m.unlock())
coro.yield_slice()
self.assertFalse(m.has_lock())
self.assertTrue(m.has_lock(t))
coro.yield_slice()
def _test_ownership(self, m):
# This trylock "fails".
self.assertTrue(m.trylock())
# This one blocks.
self.assertTrue(m.lock())
# Bounce back to other thread.
coro.yield_slice()
def test_multiple_lock(self):
"""Test locking mutex multiple times."""
m = coro.mutex()
self.assertFalse(m.locked())
self.assertFalse(m.has_lock())
self.assertFalse(m.lock())
self.assertTrue(m.locked())
self.assertTrue(m.has_lock())
self.assertFalse(m.lock())
self.assertTrue(m.locked())
self.assertTrue(m.has_lock())
self.assertFalse(m.unlock())
self.assertTrue(m.locked())
self.assertTrue(m.has_lock())
self.assertFalse(m.unlock())
self.assertFalse(m.locked())
self.assertFalse(m.has_lock())
def test_unlock_resume(self):
"""Test that unlock resume."""
m = coro.mutex()
coro.spawn(self._test_unlock_resume, m)
coro.yield_slice()
# This will block, bounce over to other thread.
self.assertTrue(m.lock())
self.assertTrue(m.has_lock())
self.assertFalse(m.unlock())
self.assertFalse(m.has_lock())
def _test_unlock_resume(self, m):
self.assertFalse(m.lock())
# Bounce back to other thread.
coro.yield_slice()
self.assertTrue(m.unlock())
if __name__ == '__main__':
coro_unittest.run_tests()
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