61 lines
1.6 KiB
Python
61 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2015 Yahoo! Inc. All Rights Reserved.
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#
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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try:
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from time import monotonic as now
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except ImportError:
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from time import time as now
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class StopWatch(object):
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"""A really basic stop watch."""
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def __init__(self, duration=None):
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self.duration = duration
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self.started_at = None
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self.stopped_at = None
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def elapsed(self):
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if self.stopped_at is not None:
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t = self.stopped_at
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else:
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t = now()
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e = t - self.started_at
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return max(0.0, e)
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def __enter__(self):
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self.start()
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return self
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def __exit__(self, exc_type, exc_value, exc_tb):
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self.stopped_at = now()
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def start(self):
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self.started_at = now()
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self.stopped_at = None
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def expired(self):
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if self.duration is None:
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return False
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else:
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e = self.elapsed()
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if e > self.duration:
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return True
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return False
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