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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
import inspect, time
def synchronized(meth):
args, vargs, kwargs, defs = inspect.getargspec(meth)
scope = {}
scope["meth"] = meth
exec """
def %s%s:
%s
%s._lock.acquire()
try:
return meth%s
finally:
%s._lock.release()
""" % (meth.__name__, inspect.formatargspec(args, vargs, kwargs, defs),
repr(inspect.getdoc(meth)), args[0],
inspect.formatargspec(args, vargs, kwargs, defs,
formatvalue=lambda x: ""),
args[0]) in scope
return scope[meth.__name__]
class Waiter(object):
def __init__(self, condition):
self.condition = condition
def wait(self, predicate, timeout=None):
passed = 0
start = time.time()
while not predicate():
if timeout is None:
# using the timed wait prevents keyboard interrupts from being
# blocked while waiting
self.condition.wait(3)
elif passed < timeout:
self.condition.wait(timeout - passed)
else:
return False
passed = time.time() - start
return True
def notify(self):
self.condition.notify()
def notifyAll(self):
self.condition.notifyAll()
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