mirror of
https://github.com/python/cpython.git
synced 2024-11-29 04:44:13 +08:00
Removes the 'Call' class which is used to control execution order and is unreliable on Windows
This commit is contained in:
Brian Quinlan
parent
ff72816b5f
commit
1d1df8257f
@ -9,24 +9,16 @@ test.support.import_module('multiprocessing.synchronize')
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# without thread support.
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test.support.import_module('threading')
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import io
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import logging
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import multiprocessing
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import sys
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import threading
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import time
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import unittest
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if sys.platform.startswith('win'):
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import ctypes
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import ctypes.wintypes
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from concurrent import futures
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from concurrent.futures._base import (
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PENDING, RUNNING, CANCELLED, CANCELLED_AND_NOTIFIED, FINISHED, Future,
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LOGGER, wait)
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PENDING, RUNNING, CANCELLED, CANCELLED_AND_NOTIFIED, FINISHED, Future)
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import concurrent.futures.process
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def create_future(state=PENDING, exception=None, result=None):
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f = Future()
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f._state = state
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@ -34,6 +26,7 @@ def create_future(state=PENDING, exception=None, result=None):
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f._result = result
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return f
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PENDING_FUTURE = create_future(state=PENDING)
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RUNNING_FUTURE = create_future(state=RUNNING)
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CANCELLED_FUTURE = create_future(state=CANCELLED)
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@ -41,111 +34,48 @@ CANCELLED_AND_NOTIFIED_FUTURE = create_future(state=CANCELLED_AND_NOTIFIED)
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EXCEPTION_FUTURE = create_future(state=FINISHED, exception=IOError())
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SUCCESSFUL_FUTURE = create_future(state=FINISHED, result=42)
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def mul(x, y):
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return x * y
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class Call(object):
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"""A call that can be submitted to a future.Executor for testing.
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The call signals when it is called and waits for an event before finishing.
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"""
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CALL_LOCKS = {}
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def _create_event(self):
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if sys.platform.startswith('win'):
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class SECURITY_ATTRIBUTES(ctypes.Structure):
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_fields_ = [("nLength", ctypes.wintypes.DWORD),
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("lpSecurityDescriptor", ctypes.wintypes.LPVOID),
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("bInheritHandle", ctypes.wintypes.BOOL)]
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def sleep_and_raise(t):
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time.sleep(t)
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raise Exception('this is an exception')
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s = SECURITY_ATTRIBUTES()
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s.nLength = ctypes.sizeof(s)
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s.lpSecurityDescriptor = None
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s.bInheritHandle = True
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handle = ctypes.windll.kernel32.CreateEventA(ctypes.pointer(s),
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True,
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False,
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None)
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assert handle is not None
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return handle
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else:
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event = self.Event[0]()
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self.CALL_LOCKS[id(event)] = event
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return id(event)
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class ExecutorMixin:
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worker_count = 5
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def _prime_executor(self):
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# Make sure that the executor is ready to do work before running the
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# tests. This should reduce the probability of timeouts in the tests.
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futures = [self.executor.submit(time.sleep, 0.1)
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for _ in range(self.worker_count)]
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def _wait_on_event(self, handle):
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if sys.platform.startswith('win'):
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# WaitForSingleObject returns 0 if handle is signaled.
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r = ctypes.windll.kernel32.WaitForSingleObject(handle, 60 * 1000)
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if r != 0:
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message = (
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'WaitForSingleObject({}, ...) failed with {}, '
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'GetLastError() = {}'.format(
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handle, r, ctypes.GetLastError()))
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logging.critical(message)
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assert False, message
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else:
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self.CALL_LOCKS[handle].wait()
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for f in futures:
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f.result()
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def _signal_event(self, handle):
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if sys.platform.startswith('win'):
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r = ctypes.windll.kernel32.SetEvent(handle) # Returns 0 on failure.
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if r == 0:
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message = (
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'SetEvent({}) failed with {}, GetLastError() = {}'.format(
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handle, r, ctypes.GetLastError()))
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logging.critical(message)
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assert False, message
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else:
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self.CALL_LOCKS[handle].set()
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def __init__(self, Event, manual_finish=False, result=42):
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self.Event = Event
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self._called_event = self._create_event()
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self._can_finish = self._create_event()
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class ThreadPoolMixin(ExecutorMixin):
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def setUp(self):
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self.executor = futures.ThreadPoolExecutor(max_workers=5)
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self._prime_executor()
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self._result = result
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def tearDown(self):
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self.executor.shutdown(wait=True)
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if not manual_finish:
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self._signal_event(self._can_finish)
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def wait_on_called(self):
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self._wait_on_event(self._called_event)
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class ProcessPoolMixin(ExecutorMixin):
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def setUp(self):
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try:
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self.executor = futures.ProcessPoolExecutor(max_workers=5)
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except NotImplementedError as e:
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self.skipTest(str(e))
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self._prime_executor()
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def set_can(self):
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self._signal_event(self._can_finish)
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def tearDown(self):
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self.executor.shutdown(wait=True)
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def __call__(self):
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self._signal_event(self._called_event)
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self._wait_on_event(self._can_finish)
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return self._result
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def close(self):
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self.set_can()
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if sys.platform.startswith('win'):
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ctypes.windll.kernel32.CloseHandle(self._called_event)
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ctypes.windll.kernel32.CloseHandle(self._can_finish)
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self._called_event = None
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self._can_finish = None
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else:
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del self.CALL_LOCKS[self._called_event]
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del self.CALL_LOCKS[self._can_finish]
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class ExceptionCall(Call):
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def __call__(self):
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self._signal_event(self._called_event)
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self._wait_on_event(self._can_finish)
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raise ZeroDivisionError()
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class MapCall(Call):
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def __init__(self, Event, result=42):
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super().__init__(Event, manual_finish=True, result=result)
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def __call__(self, manual_finish):
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if manual_finish:
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super().__call__()
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return self._result
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class ExecutorShutdownTest(unittest.TestCase):
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def test_run_after_shutdown(self):
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@ -155,52 +85,14 @@ class ExecutorShutdownTest(unittest.TestCase):
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pow, 2, 5)
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def _start_some_futures(self):
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call1 = Call(self.Event, manual_finish=True)
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call2 = Call(self.Event, manual_finish=True)
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call3 = Call(self.Event, manual_finish=True)
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try:
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self.executor.submit(call1)
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self.executor.submit(call2)
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self.executor.submit(call3)
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call1.wait_on_called()
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call2.wait_on_called()
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call3.wait_on_called()
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call1.set_can()
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call2.set_can()
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call3.set_can()
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finally:
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call1.close()
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call2.close()
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call3.close()
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class ThreadPoolMixin:
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# wrap in tuple to prevent creation of instance methods
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Event = (threading.Event,)
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def setUp(self):
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self.executor = futures.ThreadPoolExecutor(max_workers=5)
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def tearDown(self):
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self.executor.shutdown(wait=True)
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class ProcessPoolMixin:
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# wrap in tuple to prevent creation of instance methods
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Event = (multiprocessing.Event,)
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def setUp(self):
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try:
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self.executor = futures.ProcessPoolExecutor(max_workers=5)
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except NotImplementedError as e:
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self.skipTest(str(e))
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def tearDown(self):
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self.executor.shutdown(wait=True)
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class ThreadPoolShutdownTest(ThreadPoolMixin, ExecutorShutdownTest):
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def _prime_executor(self):
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pass
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def test_threads_terminate(self):
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self._start_some_futures()
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self.executor.submit(mul, 21, 2)
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self.executor.submit(mul, 6, 7)
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self.executor.submit(mul, 3, 14)
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self.assertEqual(len(self.executor._threads), 3)
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self.executor.shutdown()
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for t in self.executor._threads:
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@ -224,9 +116,15 @@ class ThreadPoolShutdownTest(ThreadPoolMixin, ExecutorShutdownTest):
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for t in threads:
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t.join()
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class ProcessPoolShutdownTest(ProcessPoolMixin, ExecutorShutdownTest):
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def _prime_executor(self):
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pass
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def test_processes_terminate(self):
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self._start_some_futures()
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self.executor.submit(mul, 21, 2)
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self.executor.submit(mul, 6, 7)
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self.executor.submit(mul, 3, 14)
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self.assertEqual(len(self.executor._processes), 5)
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processes = self.executor._processes
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self.executor.shutdown()
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@ -236,11 +134,11 @@ class ProcessPoolShutdownTest(ProcessPoolMixin, ExecutorShutdownTest):
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def test_context_manager_shutdown(self):
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with futures.ProcessPoolExecutor(max_workers=5) as e:
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executor = e
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processes = e._processes
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self.assertEqual(list(e.map(abs, range(-5, 5))),
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[5, 4, 3, 2, 1, 0, 1, 2, 3, 4])
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for p in self.executor._processes:
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for p in processes:
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p.join()
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def test_del_shutdown(self):
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@ -256,288 +154,158 @@ class ProcessPoolShutdownTest(ProcessPoolMixin, ExecutorShutdownTest):
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class WaitTests(unittest.TestCase):
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def test_first_completed(self):
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def wait_test():
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while not future1._waiters:
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pass
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call1.set_can()
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future1 = self.executor.submit(mul, 21, 2)
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future2 = self.executor.submit(time.sleep, 5)
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call1 = Call(self.Event, manual_finish=True)
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call2 = Call(self.Event, manual_finish=True)
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try:
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future1 = self.executor.submit(call1)
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future2 = self.executor.submit(call2)
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done, not_done = futures.wait(
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[CANCELLED_FUTURE, future1, future2],
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return_when=futures.FIRST_COMPLETED)
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t = threading.Thread(target=wait_test)
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t.start()
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done, not_done = futures.wait(
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[CANCELLED_FUTURE, future1, future2],
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return_when=futures.FIRST_COMPLETED)
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self.assertEqual(set([future1]), done)
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self.assertEqual(set([CANCELLED_FUTURE, future2]), not_done)
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self.assertEqual(set([future1]), done)
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self.assertEqual(set([CANCELLED_FUTURE, future2]), not_done)
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finally:
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call1.close()
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call2.close()
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def test_first_completed_some_already_completed(self):
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future1 = self.executor.submit(time.sleep, 2)
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def test_first_completed_one_already_completed(self):
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call1 = Call(self.Event, manual_finish=True)
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try:
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future1 = self.executor.submit(call1)
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finished, pending = futures.wait(
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[CANCELLED_AND_NOTIFIED_FUTURE, SUCCESSFUL_FUTURE, future1],
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return_when=futures.FIRST_COMPLETED)
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finished, pending = futures.wait(
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[SUCCESSFUL_FUTURE, future1],
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return_when=futures.FIRST_COMPLETED)
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self.assertEqual(set([SUCCESSFUL_FUTURE]), finished)
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self.assertEqual(set([future1]), pending)
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finally:
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call1.close()
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self.assertEqual(
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set([CANCELLED_AND_NOTIFIED_FUTURE, SUCCESSFUL_FUTURE]),
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finished)
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self.assertEqual(set([future1]), pending)
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def test_first_exception(self):
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def wait_test():
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while not future1._waiters:
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pass
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call1.set_can()
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call2.set_can()
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future1 = self.executor.submit(mul, 2, 21)
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future2 = self.executor.submit(sleep_and_raise, 5)
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future3 = self.executor.submit(time.sleep, 10)
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call1 = Call(self.Event, manual_finish=True)
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call2 = ExceptionCall(self.Event, manual_finish=True)
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call3 = Call(self.Event, manual_finish=True)
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try:
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future1 = self.executor.submit(call1)
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future2 = self.executor.submit(call2)
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future3 = self.executor.submit(call3)
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finished, pending = futures.wait(
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[future1, future2, future3],
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return_when=futures.FIRST_EXCEPTION)
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t = threading.Thread(target=wait_test)
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t.start()
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finished, pending = futures.wait(
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[future1, future2, future3],
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return_when=futures.FIRST_EXCEPTION)
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self.assertEqual(set([future1, future2]), finished)
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self.assertEqual(set([future3]), pending)
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finally:
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call1.close()
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call2.close()
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call3.close()
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self.assertEqual(set([future1, future2]), finished)
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self.assertEqual(set([future3]), pending)
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def test_first_exception_some_already_complete(self):
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def wait_test():
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while not future1._waiters:
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pass
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call1.set_can()
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future1 = self.executor.submit(divmod, 21, 0)
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future2 = self.executor.submit(time.sleep, 5)
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call1 = ExceptionCall(self.Event, manual_finish=True)
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call2 = Call(self.Event, manual_finish=True)
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try:
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future1 = self.executor.submit(call1)
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future2 = self.executor.submit(call2)
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finished, pending = futures.wait(
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[SUCCESSFUL_FUTURE,
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CANCELLED_FUTURE,
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CANCELLED_AND_NOTIFIED_FUTURE,
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future1, future2],
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return_when=futures.FIRST_EXCEPTION)
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t = threading.Thread(target=wait_test)
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t.start()
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finished, pending = futures.wait(
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[SUCCESSFUL_FUTURE,
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CANCELLED_FUTURE,
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CANCELLED_AND_NOTIFIED_FUTURE,
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future1, future2],
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return_when=futures.FIRST_EXCEPTION)
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self.assertEqual(set([SUCCESSFUL_FUTURE,
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CANCELLED_AND_NOTIFIED_FUTURE,
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future1]), finished)
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self.assertEqual(set([CANCELLED_FUTURE, future2]), pending)
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finally:
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call1.close()
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call2.close()
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self.assertEqual(set([SUCCESSFUL_FUTURE,
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CANCELLED_AND_NOTIFIED_FUTURE,
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future1]), finished)
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self.assertEqual(set([CANCELLED_FUTURE, future2]), pending)
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def test_first_exception_one_already_failed(self):
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call1 = Call(self.Event, manual_finish=True)
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try:
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future1 = self.executor.submit(call1)
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future1 = self.executor.submit(time.sleep, 2)
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finished, pending = futures.wait(
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[EXCEPTION_FUTURE, future1],
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return_when=futures.FIRST_EXCEPTION)
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finished, pending = futures.wait(
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[EXCEPTION_FUTURE, future1],
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return_when=futures.FIRST_EXCEPTION)
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self.assertEqual(set([EXCEPTION_FUTURE]), finished)
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self.assertEqual(set([future1]), pending)
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finally:
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call1.close()
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self.assertEqual(set([EXCEPTION_FUTURE]), finished)
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self.assertEqual(set([future1]), pending)
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def test_all_completed(self):
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def wait_test():
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while not future1._waiters:
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pass
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call1.set_can()
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call2.set_can()
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future1 = self.executor.submit(divmod, 2, 0)
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future2 = self.executor.submit(mul, 2, 21)
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call1 = Call(self.Event, manual_finish=True)
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call2 = Call(self.Event, manual_finish=True)
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try:
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future1 = self.executor.submit(call1)
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future2 = self.executor.submit(call2)
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finished, pending = futures.wait(
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[SUCCESSFUL_FUTURE,
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CANCELLED_AND_NOTIFIED_FUTURE,
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EXCEPTION_FUTURE,
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future1,
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future2],
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return_when=futures.ALL_COMPLETED)
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t = threading.Thread(target=wait_test)
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t.start()
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finished, pending = futures.wait(
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[future1, future2],
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return_when=futures.ALL_COMPLETED)
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self.assertEqual(set([future1, future2]), finished)
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self.assertEqual(set(), pending)
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finally:
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call1.close()
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call2.close()
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@unittest.skip # XXX skip the test for now as it hangs
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def test_all_completed_some_already_completed(self):
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def wait_test():
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while not future1._waiters:
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pass
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future4.cancel()
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call1.set_can()
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call2.set_can()
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call3.set_can()
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self.assertLessEqual(
|
||||
futures.process.EXTRA_QUEUED_CALLS,
|
||||
1,
|
||||
'this test assumes that future4 will be cancelled before it is '
|
||||
'queued to run - which might not be the case if '
|
||||
'ProcessPoolExecutor is too aggresive in scheduling futures')
|
||||
call1 = Call(self.Event, manual_finish=True)
|
||||
call2 = Call(self.Event, manual_finish=True)
|
||||
call3 = Call(self.Event, manual_finish=True)
|
||||
call4 = Call(self.Event, manual_finish=True)
|
||||
try:
|
||||
future1 = self.executor.submit(call1)
|
||||
future2 = self.executor.submit(call2)
|
||||
future3 = self.executor.submit(call3)
|
||||
future4 = self.executor.submit(call4)
|
||||
|
||||
t = threading.Thread(target=wait_test)
|
||||
t.start()
|
||||
finished, pending = futures.wait(
|
||||
[SUCCESSFUL_FUTURE,
|
||||
CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
future1, future2, future3, future4],
|
||||
return_when=futures.ALL_COMPLETED)
|
||||
|
||||
self.assertEqual(set([SUCCESSFUL_FUTURE,
|
||||
CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
future1, future2, future3, future4]),
|
||||
finished)
|
||||
self.assertEqual(set(), pending)
|
||||
finally:
|
||||
call1.close()
|
||||
call2.close()
|
||||
call3.close()
|
||||
call4.close()
|
||||
self.assertEqual(set([SUCCESSFUL_FUTURE,
|
||||
CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
future1,
|
||||
future2]), finished)
|
||||
self.assertEqual(set(), pending)
|
||||
|
||||
def test_timeout(self):
|
||||
def wait_test():
|
||||
while not future1._waiters:
|
||||
pass
|
||||
call1.set_can()
|
||||
future1 = self.executor.submit(mul, 6, 7)
|
||||
future2 = self.executor.submit(time.sleep, 10)
|
||||
|
||||
call1 = Call(self.Event, manual_finish=True)
|
||||
call2 = Call(self.Event, manual_finish=True)
|
||||
try:
|
||||
future1 = self.executor.submit(call1)
|
||||
future2 = self.executor.submit(call2)
|
||||
finished, pending = futures.wait(
|
||||
[CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE,
|
||||
future1, future2],
|
||||
timeout=5,
|
||||
return_when=futures.ALL_COMPLETED)
|
||||
|
||||
t = threading.Thread(target=wait_test)
|
||||
t.start()
|
||||
finished, pending = futures.wait(
|
||||
[CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE,
|
||||
future1, future2],
|
||||
timeout=5,
|
||||
return_when=futures.ALL_COMPLETED)
|
||||
|
||||
self.assertEqual(set([CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE,
|
||||
future1]), finished)
|
||||
self.assertEqual(set([future2]), pending)
|
||||
|
||||
|
||||
finally:
|
||||
call1.close()
|
||||
call2.close()
|
||||
self.assertEqual(set([CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE,
|
||||
future1]), finished)
|
||||
self.assertEqual(set([future2]), pending)
|
||||
|
||||
|
||||
class ThreadPoolWaitTests(ThreadPoolMixin, WaitTests):
|
||||
pass
|
||||
|
||||
|
||||
class ProcessPoolWaitTests(ProcessPoolMixin, WaitTests):
|
||||
pass
|
||||
|
||||
|
||||
class AsCompletedTests(unittest.TestCase):
|
||||
# TODO(brian@sweetapp.com): Should have a test with a non-zero timeout.
|
||||
def test_no_timeout(self):
|
||||
def wait_test():
|
||||
while not future1._waiters:
|
||||
pass
|
||||
call1.set_can()
|
||||
call2.set_can()
|
||||
future1 = self.executor.submit(mul, 2, 21)
|
||||
future2 = self.executor.submit(mul, 7, 6)
|
||||
|
||||
call1 = Call(self.Event, manual_finish=True)
|
||||
call2 = Call(self.Event, manual_finish=True)
|
||||
try:
|
||||
future1 = self.executor.submit(call1)
|
||||
future2 = self.executor.submit(call2)
|
||||
|
||||
t = threading.Thread(target=wait_test)
|
||||
t.start()
|
||||
completed = set(futures.as_completed(
|
||||
[CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE,
|
||||
future1, future2]))
|
||||
self.assertEqual(set(
|
||||
[CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE,
|
||||
future1, future2]),
|
||||
completed)
|
||||
finally:
|
||||
call1.close()
|
||||
call2.close()
|
||||
completed = set(futures.as_completed(
|
||||
[CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE,
|
||||
future1, future2]))
|
||||
self.assertEqual(set(
|
||||
[CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE,
|
||||
future1, future2]),
|
||||
completed)
|
||||
|
||||
def test_zero_timeout(self):
|
||||
call1 = Call(self.Event, manual_finish=True)
|
||||
future1 = self.executor.submit(time.sleep, 2)
|
||||
completed_futures = set()
|
||||
try:
|
||||
future1 = self.executor.submit(call1)
|
||||
completed_futures = set()
|
||||
try:
|
||||
for future in futures.as_completed(
|
||||
[CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE,
|
||||
future1],
|
||||
timeout=0):
|
||||
completed_futures.add(future)
|
||||
except futures.TimeoutError:
|
||||
pass
|
||||
for future in futures.as_completed(
|
||||
[CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE,
|
||||
future1],
|
||||
timeout=0):
|
||||
completed_futures.add(future)
|
||||
except futures.TimeoutError:
|
||||
pass
|
||||
|
||||
self.assertEqual(set([CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE]),
|
||||
completed_futures)
|
||||
|
||||
self.assertEqual(set([CANCELLED_AND_NOTIFIED_FUTURE,
|
||||
EXCEPTION_FUTURE,
|
||||
SUCCESSFUL_FUTURE]),
|
||||
completed_futures)
|
||||
finally:
|
||||
call1.close()
|
||||
|
||||
class ThreadPoolAsCompletedTests(ThreadPoolMixin, AsCompletedTests):
|
||||
pass
|
||||
|
||||
|
||||
class ProcessPoolAsCompletedTests(ProcessPoolMixin, AsCompletedTests):
|
||||
pass
|
||||
|
||||
|
||||
class ExecutorTest(unittest.TestCase):
|
||||
# Executor.shutdown() and context manager usage is tested by
|
||||
# ExecutorShutdownTest.
|
||||
@ -562,28 +330,27 @@ class ExecutorTest(unittest.TestCase):
|
||||
|
||||
def test_map_timeout(self):
|
||||
results = []
|
||||
timeout_call = MapCall(self.Event)
|
||||
try:
|
||||
try:
|
||||
for i in self.executor.map(timeout_call,
|
||||
[False, False, True],
|
||||
timeout=5):
|
||||
results.append(i)
|
||||
except futures.TimeoutError:
|
||||
pass
|
||||
else:
|
||||
self.fail('expected TimeoutError')
|
||||
finally:
|
||||
timeout_call.close()
|
||||
for i in self.executor.map(time.sleep,
|
||||
[0, 0, 10],
|
||||
timeout=5):
|
||||
results.append(i)
|
||||
except futures.TimeoutError:
|
||||
pass
|
||||
else:
|
||||
self.fail('expected TimeoutError')
|
||||
|
||||
self.assertEqual([None, None], results)
|
||||
|
||||
self.assertEqual([42, 42], results)
|
||||
|
||||
class ThreadPoolExecutorTest(ThreadPoolMixin, ExecutorTest):
|
||||
pass
|
||||
|
||||
|
||||
class ProcessPoolExecutorTest(ProcessPoolMixin, ExecutorTest):
|
||||
pass
|
||||
|
||||
|
||||
class FutureTests(unittest.TestCase):
|
||||
def test_done_callback_with_result(self):
|
||||
callback_result = None
|
||||
|
||||
Loading…
Reference in New Issue
Block a user