本文整理汇总了Python中multiprocessing.util._run_finalizers方法的典型用法代码示例。如果您正苦于以下问题：Python util._run_finalizers方法的具体用法？Python util._run_finalizers怎么用？Python util._run_finalizers使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类multiprocessing.util的用法示例。
在下文中一共展示了util._run_finalizers方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: shutdown
# 需要导入模块: from multiprocessing import util [as 别名]
# 或者: from multiprocessing.util import _run_finalizers [as 别名]
def shutdown(self, c):
'''
Shutdown this process
'''
try:
try:
util.debug('manager received shutdown message')
c.send(('#RETURN', None))
if sys.stdout != sys.__stdout__:
util.debug('resetting stdout, stderr')
sys.stdout = sys.__stdout__
sys.stderr = sys.__stderr__
util._run_finalizers(0)
for p in active_children():
util.debug('terminating a child process of manager')
p.terminate()
for p in active_children():
util.debug('terminating a child process of manager')
p.join()
util._run_finalizers()
util.info('manager exiting with exitcode 0')
except:
import traceback
traceback.print_exc()
finally:
exit(0) 示例2: test_thread_safety
# 需要导入模块: from multiprocessing import util [as 别名]
# 或者: from multiprocessing.util import _run_finalizers [as 别名]
def test_thread_safety(self):
# bpo-24484: _run_finalizers() should be thread-safe
def cb():
pass
class Foo(object):
def __init__(self):
self.ref = self # create reference cycle
# insert finalizer at random key
util.Finalize(self, cb, exitpriority=random.randint(1, 100))
finish = False
exc = []
def run_finalizers():
while not finish:
time.sleep(random.random() * 1e-1)
try:
# A GC run will eventually happen during this,
# collecting stale Foo's and mutating the registry
util._run_finalizers()
except Exception as e:
exc.append(e)
def make_finalizers():
d = {}
while not finish:
try:
# Old Foo's get gradually replaced and later
# collected by the GC (because of the cyclic ref)
d[random.getrandbits(5)] = {Foo() for i in range(10)}
except Exception as e:
exc.append(e)
d.clear()
old_interval = sys.getcheckinterval()
old_threshold = gc.get_threshold()
try:
sys.setcheckinterval(10)
gc.set_threshold(5, 5, 5)
threads = [threading.Thread(target=run_finalizers),
threading.Thread(target=make_finalizers)]
with support.start_threads(threads):
time.sleep(4.0) # Wait a bit to trigger race condition
finish = True
if exc:
raise exc[0]
finally:
sys.setcheckinterval(old_interval)
gc.set_threshold(*old_threshold)
gc.collect() # Collect remaining Foo's
#
# Test that from ... import * works for each module
# 示例3: test_thread_safety
# 需要导入模块: from multiprocessing import util [as 别名]
# 或者: from multiprocessing.util import _run_finalizers [as 别名]
def test_thread_safety(self):
# bpo-24484: _run_finalizers() should be thread-safe
def cb():
pass
class Foo(object):
def __init__(self):
self.ref = self # create reference cycle
# insert finalizer at random key
util.Finalize(self, cb, exitpriority=random.randint(1, 100))
finish = False
exc = None
def run_finalizers():
nonlocal exc
while not finish:
time.sleep(random.random() * 1e-1)
try:
# A GC run will eventually happen during this,
# collecting stale Foo's and mutating the registry
util._run_finalizers()
except Exception as e:
exc = e
def make_finalizers():
nonlocal exc
d = {}
while not finish:
try:
# Old Foo's get gradually replaced and later
# collected by the GC (because of the cyclic ref)
d[random.getrandbits(5)] = {Foo() for i in range(10)}
except Exception as e:
exc = e
d.clear()
old_interval = sys.getswitchinterval()
old_threshold = gc.get_threshold()
try:
sys.setswitchinterval(1e-6)
gc.set_threshold(5, 5, 5)
threads = [threading.Thread(target=run_finalizers),
threading.Thread(target=make_finalizers)]
with test.support.start_threads(threads):
time.sleep(4.0) # Wait a bit to trigger race condition
finish = True
if exc is not None:
raise exc
finally:
sys.setswitchinterval(old_interval)
gc.set_threshold(*old_threshold)
gc.collect() # Collect remaining Foo's
#
# Test that from ... import * works for each module
#