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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 read-write lock."""
import coro
import unittest
from coro.test import coro_unittest
class Test(unittest.TestCase):
def test_write_block_interrupt_schedule(self):
"""Test write block interrupt then schedule on rw_lock."""
lock = coro.rw_lock()
lock.read_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._write_block, lock))
# Spawn a thread that we will not interrupt.
no_interrupt_thread = coro.spawn(self._write_block, lock)
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.
lock.read_unlock()
coro.yield_slice()
# Verify that it ran.
self.assertEqual(self._resume_count, 1)
def _write_block(self, lock):
lock.write_lock()
self._resume_count += 1
lock.write_unlock()
def _read_block(self, lock):
lock.read_lock()
self._resume_count += 1
lock.read_unlock()
def test_write_block_schedule_interrupt(self):
"""Test write block schedule then interrupt on rw_lock."""
lock = coro.rw_lock()
lock.read_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._write_block, lock))
# Spawn a thread that we will not interrupt.
no_interrupt_thread = coro.spawn(self._write_block, lock)
coro.yield_slice()
# Schedule all of the threads.
lock.read_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_read_block_interrupt_schedule(self):
"""Test read block interrupt then schedule on rw_lock."""
lock = coro.rw_lock()
lock.write_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._read_block, lock))
# Spawn a thread that we will not interrupt.
no_interrupt_thread = coro.spawn(self._read_block, lock)
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.
lock.write_unlock()
coro.yield_slice()
# Verify that it ran.
self.assertEqual(self._resume_count, 1)
def test_read_block_schedule_interrupt(self):
"""Test read block schedule then interrupt on rw_lock."""
lock = coro.rw_lock()
lock.write_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._read_block, lock))
# Spawn a thread that we will not interrupt.
no_interrupt_thread = coro.spawn(self._read_block, lock)
coro.yield_slice()
# Schedule all of the threads.
lock.write_unlock()
# Now interrupt them.
for t in threads:
t.shutdown()
coro.yield_slice()
# Verify that it ran.
self.assertEqual(self._resume_count, 1)
if __name__ == '__main__':
coro_unittest.run_tests()