def run(self):
lock = lock_file(self.path)
while True:
msg = self.child_conn.recv()
if msg == 'acquire':
lock.acquire()
self.child_conn.send('acquired')
elif msg == 'release':
lock.release()
self.child_conn.send('released')
elif msg == 'shutdown':
break
self.child_conn.close()
def test_lock_file_multiple_processes(tmpdir):
path = str(tmpdir.join('lock'))
lock = lock_file(path)
locker = Locker(path=path)
locker.start()
locker.parent_conn.send('acquire')
assert 'acquired' == locker.parent_conn.recv()
locker.parent_conn.send('release')
assert 'released' == locker.parent_conn.recv()
lock.acquire()
locker.parent_conn.send('acquire')
assert not locker.parent_conn.poll(0.1)
lock.release()
assert 'acquired' == locker.parent_conn.recv()
locker.parent_conn.send('release')
assert 'released' == locker.parent_conn.recv()
locker.shutdown()
locker.join()
def test_lock_file_same_object_used_for_same_path(tmpdir):
path = str(tmpdir.join('lock'))
lock1 = lock_file(path)
lock2 = lock_file(path)
assert lock1 is lock2
def test_lock_file_single_process(tmpdir):
path = str(tmpdir.join('lock'))
acquired = False
with lock_file(path):
acquired = True
assert acquired