def try_lock():
try:
my_lock = lockutils._FcntlLock(lock_file)
my_lock.lockfile = open(lock_file, 'w')
my_lock.trylock()
my_lock.unlock()
os._exit(1)
except IOError:
os._exit(0)
def try_lock():
try:
my_lock = lockutils._FcntlLock(lock_file)
my_lock.lockfile = open(lock_file, 'w')
my_lock.trylock()
my_lock.unlock()
os._exit(1)
except IOError:
os._exit(0)
def try_lock():
lock.release() # child co-owns it before fork
try:
my_lock = lockutils._FcntlLock(lock_file)
my_lock.lockfile = open(lock_file, 'w')
my_lock.trylock()
my_lock.unlock()
os._exit(1)
except IOError:
os._exit(0)
def try_lock():
lock.release() # child co-owns it before fork
try:
my_lock = lockutils._FcntlLock(lock_file)
my_lock.lockfile = open(lock_file, 'w')
my_lock.trylock()
my_lock.unlock()
os._exit(1)
except IOError:
os._exit(0)
def test_lock_acquire_release_file_lock(self):
lock_dir = tempfile.mkdtemp()
lock_file = os.path.join(lock_dir, 'lock')
lock = lockutils._FcntlLock(lock_file)
def try_lock():
lock.release() # child co-owns it before fork
try:
my_lock = lockutils._FcntlLock(lock_file)
my_lock.lockfile = open(lock_file, 'w')
my_lock.trylock()
my_lock.unlock()
os._exit(1)
except IOError:
os._exit(0)
def attempt_acquire(count):
children = []
for i in range(count):
child = multiprocessing.Process(target=try_lock)
child.start()
children.append(child)
exit_codes = []
for child in children:
child.join()
exit_codes.append(child.exitcode)
return sum(exit_codes)
self.assertTrue(lock.acquire())
try:
acquired_children = attempt_acquire(10)
self.assertEqual(0, acquired_children)
finally:
lock.release()
try:
acquired_children = attempt_acquire(5)
self.assertNotEqual(0, acquired_children)
finally:
try:
shutil.rmtree(lock_dir)
except IOError:
pass
def test_lock_acquire_release_file_lock(self):
lock_dir = tempfile.mkdtemp()
lock_file = os.path.join(lock_dir, 'lock')
lock = lockutils._FcntlLock(lock_file)
def try_lock():
lock.release() # child co-owns it before fork
try:
my_lock = lockutils._FcntlLock(lock_file)
my_lock.lockfile = open(lock_file, 'w')
my_lock.trylock()
my_lock.unlock()
os._exit(1)
except IOError:
os._exit(0)
def attempt_acquire(count):
children = []
for i in range(count):
child = multiprocessing.Process(target=try_lock)
child.start()
children.append(child)
exit_codes = []
for child in children:
child.join()
exit_codes.append(child.exitcode)
return sum(exit_codes)
self.assertTrue(lock.acquire())
try:
acquired_children = attempt_acquire(10)
self.assertEqual(0, acquired_children)
finally:
lock.release()
try:
acquired_children = attempt_acquire(5)
self.assertNotEqual(0, acquired_children)
finally:
try:
shutil.rmtree(lock_dir)
except IOError:
pass
