本文整理汇总了Python中eventlet.semaphore.Semaphore.release方法的典型用法代码示例。如果您正苦于以下问题:Python Semaphore.release方法的具体用法?Python Semaphore.release怎么用?Python Semaphore.release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eventlet.semaphore.Semaphore
的用法示例。
在下文中一共展示了Semaphore.release方法的6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: __init__
# 需要导入模块: from eventlet.semaphore import Semaphore [as 别名]
# 或者: from eventlet.semaphore.Semaphore import release [as 别名]
class MJPEGProxy:
def __init__(self, listen_address, connect_address):
self.log = logging.getLogger('MJPEGProxy')
self.connect_address = connect_address
self.listen_address = listen_address
self.clients = []
self.connection = None
self.header = None
self.sem = Semaphore(1)
def run(self):
self.log.info("Starting")
eventlet.spawn_n(self.proxy)
self.listen()
def listen(self):
server = eventlet.listen(self.listen_address)
while True:
connection, address = server.accept()
self.add_client(connection, address)
def proxy(self):
while True:
eventlet.sleep(0) # sem.release(); sem.acquire() doesn't yield?!
self.sem.acquire()
if len(self.clients) == 0:
if self.connection:
self.disconnect()
self.sem.release()
eventlet.sleep(0.1)
continue
self.sem.release()
data = ''
try:
data = self.connection.recv(1024)
except:
self.log.info("Timed out reading data from source.")
if (len(data) == 0):
self.log.info("No data recieved from source, forcing reconnect.");
self.disconnect()
data = self.connect()
for client in self.clients:
try:
client.send(data)
except socket.error, err:
self.clients.remove(client)
client.close()
self.log.info("Client %s disconnected: %s [clients: %s]", client, err, len(self.clients))
示例2: EntrypointWaiter
# 需要导入模块: from eventlet.semaphore import Semaphore [as 别名]
# 或者: from eventlet.semaphore.Semaphore import release [as 别名]
class EntrypointWaiter(InjectionProvider):
"""Helper for `entrypoint_waiter`
Injection to be manually (and temporarily) added to an existing container.
Takes an entrypoint name, and exposes a `wait` method, which will return
once the entrypoint has fired.
"""
def __init__(self, entrypoint):
self.name = '_entrypoint_waiter_{}'.format(entrypoint)
self.entrypoint = entrypoint
self.done = Semaphore(value=0)
def worker_teardown(self, worker_ctx):
provider = worker_ctx.provider
if provider.name == self.entrypoint:
self.done.release()
def wait(self):
self.done.acquire()
示例3: EntrypointWaiter
# 需要导入模块: from eventlet.semaphore import Semaphore [as 别名]
# 或者: from eventlet.semaphore.Semaphore import release [as 别名]
class EntrypointWaiter(DependencyProvider):
"""Helper for `entrypoint_waiter`
DependencyProvider to be manually (and temporarily) added to an existing
container. Takes an entrypoint name, and exposes a `wait` method, which
will return once the entrypoint has fired.
"""
class Timeout(Exception):
pass
def __init__(self, entrypoint):
self.attr_name = '_entrypoint_waiter_{}'.format(entrypoint)
self.entrypoint = entrypoint
self.done = Semaphore(value=0)
def worker_teardown(self, worker_ctx):
entrypoint = worker_ctx.entrypoint
if entrypoint.method_name == self.entrypoint:
self.done.release()
def wait(self):
self.done.acquire()
示例4: Coroutine
# 需要导入模块: from eventlet.semaphore import Semaphore [as 别名]
# 或者: from eventlet.semaphore.Semaphore import release [as 别名]
class Coroutine(object):
"""
This class simulates a coroutine, which is ironic, as greenlet actually
*is* a coroutine. But trying to use greenlet here gives nasty results
since eventlet thoroughly monkey-patches things, making it difficult
to run greenlet on its own.
Essentially think of this as a wrapper for eventlet's threads which has a
run and sleep function similar to old school coroutines, meaning it won't
start until told and when asked to sleep it won't wake back up without
permission.
"""
ALL = []
def __init__(self, func, *args, **kwargs):
self.my_sem = Semaphore(0) # This is held by the thread as it runs.
self.caller_sem = None
self.dead = False
started = Event()
self.id = 5
self.ALL.append(self)
def go():
self.id = eventlet.corolocal.get_ident()
started.send(True)
self.my_sem.acquire(blocking=True, timeout=None)
try:
func(*args, **kwargs)
# except Exception as e:
# print("Exception in coroutine! %s" % e)
finally:
self.dead = True
self.caller_sem.release() # Relinquish control back to caller.
for i in range(len(self.ALL)):
if self.ALL[i].id == self.id:
del self.ALL[i]
break
true_spawn(go)
started.wait()
@classmethod
def get_current(cls):
"""Finds the coroutine associated with the thread which calls it."""
return cls.get_by_id(eventlet.corolocal.get_ident())
@classmethod
def get_by_id(cls, id):
for cr in cls.ALL:
if cr.id == id:
return cr
raise RuntimeError("Coroutine with id %s not found!" % id)
def sleep(self):
"""Puts the coroutine to sleep until run is called again.
This should only be called by the thread which owns this object.
"""
# Only call this from its own thread.
assert eventlet.corolocal.get_ident() == self.id
self.caller_sem.release() # Relinquish control back to caller.
self.my_sem.acquire(blocking=True, timeout=None)
def run(self):
"""Starts up the thread. Should be called from a different thread."""
# Don't call this from the thread which it represents.
assert eventlet.corolocal.get_ident() != self.id
self.caller_sem = Semaphore(0)
self.my_sem.release()
self.caller_sem.acquire() # Wait for it to finish.
示例5: Pool
# 需要导入模块: from eventlet.semaphore import Semaphore [as 别名]
# 或者: from eventlet.semaphore.Semaphore import release [as 别名]
class Pool(object):
def __init__(self, min_size=0, max_size=4, track_events=False):
if min_size > max_size:
raise ValueError('min_size cannot be bigger than max_size')
self.max_size = max_size
self.sem = Semaphore(max_size)
self.procs = proc.RunningProcSet()
if track_events:
self.results = coros.queue()
else:
self.results = None
def resize(self, new_max_size):
""" Change the :attr:`max_size` of the pool.
If the pool gets resized when there are more than *new_max_size*
coroutines checked out, when they are returned to the pool they will be
discarded. The return value of :meth:`free` will be negative in this
situation.
"""
max_size_delta = new_max_size - self.max_size
self.sem.counter += max_size_delta
self.max_size = new_max_size
@property
def current_size(self):
""" The number of coroutines that are currently executing jobs. """
return len(self.procs)
def free(self):
""" Returns the number of coroutines that are available for doing
work."""
return self.sem.counter
def execute(self, func, *args, **kwargs):
"""Execute func in one of the coroutines maintained
by the pool, when one is free.
Immediately returns a :class:`~eventlet.proc.Proc` object which can be
queried for the func's result.
>>> pool = Pool()
>>> task = pool.execute(lambda a: ('foo', a), 1)
>>> task.wait()
('foo', 1)
"""
# if reentering an empty pool, don't try to wait on a coroutine freeing
# itself -- instead, just execute in the current coroutine
if self.sem.locked() and api.getcurrent() in self.procs:
p = proc.spawn(func, *args, **kwargs)
try:
p.wait()
except:
pass
else:
self.sem.acquire()
p = self.procs.spawn(func, *args, **kwargs)
# assuming the above line cannot raise
p.link(lambda p: self.sem.release())
if self.results is not None:
p.link(self.results)
return p
execute_async = execute
def _execute(self, evt, func, args, kw):
p = self.execute(func, *args, **kw)
p.link(evt)
return p
def waitall(self):
""" Calling this function blocks until every coroutine
completes its work (i.e. there are 0 running coroutines)."""
return self.procs.waitall()
wait_all = waitall
def wait(self):
"""Wait for the next execute in the pool to complete,
and return the result."""
return self.results.wait()
def waiting(self):
"""Return the number of coroutines waiting to execute.
"""
if self.sem.balance < 0:
return -self.sem.balance
else:
return 0
def killall(self):
""" Kill every running coroutine as immediately as possible."""
return self.procs.killall()
def launch_all(self, function, iterable):
"""For each tuple (sequence) in *iterable*, launch ``function(*tuple)``
in its own coroutine -- like ``itertools.starmap()``, but in parallel.
Discard values returned by ``function()``. You should call
``wait_all()`` to wait for all coroutines, newly-launched plus any
previously-submitted :meth:`execute` or :meth:`execute_async` calls, to
#.........这里部分代码省略.........
示例6: DTestQueue
# 需要导入模块: from eventlet.semaphore import Semaphore [as 别名]
# 或者: from eventlet.semaphore.Semaphore import release [as 别名]
#.........这里部分代码省略.........
if dt._partner is None:
if len(dt._revdeps) == 0:
willskip = True
else:
if len(dt._revdeps) == 1:
willskip = True
# OK, mark it skipped if we're skipping
if willskip:
dt._skipped(self.output)
else:
waiting.append(dt)
# OK, last pass: generate list of waiting tests; have to
# filter out SKIPPED tests
self.waiting = set([dt for dt in self.tests if dt.state != SKIPPED])
# Install the capture proxies...
if not debug:
capture.install()
# Spawn waiting tests
self._spawn(self.waiting)
# Wait for all tests to finish
if self.th_count > 0:
self.th_event.wait()
# OK, uninstall the capture proxies
if not debug:
capture.uninstall()
# Now we go through and clean up all left-over resources
self.res_mgr.release_all()
# Walk through the tests and output the results
cnt = {
OK: 0,
UOK: 0,
SKIPPED: 0,
FAIL: 0,
XFAIL: 0,
ERROR: 0,
DEPFAIL: 0,
'total': 0,
'threads': self.th_max,
}
for t in self.tests:
# Get the result object
r = t.result
# Update the counts
cnt[r.state] += int(r.test)
cnt['total'] += int(r.test)
# Special case update for unexpected OKs and expected failures
if r.state == UOK:
cnt[OK] += int(r.test)
elif r.state == XFAIL:
cnt[FAIL] += int(r.test)
try:
# Emit the result messages
self.output.result(r, debug)
except TypeError:
# Maybe the output object is written to the older