38 lines
900 B
Python
38 lines
900 B
Python
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# Copyright 2013 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""WatchdogTimer timeout objects."""
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import time
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class WatchdogTimer(object):
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"""A resetable timeout-based watchdog.
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This object is threadsafe.
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"""
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def __init__(self, timeout):
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"""Initializes the watchdog.
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Args:
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timeout: The timeout in seconds. If timeout is None it will never timeout.
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"""
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self._start_time = time.time()
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self._timeout = timeout
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def Reset(self):
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"""Resets the timeout countdown."""
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self._start_time = time.time()
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def IsTimedOut(self):
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"""Whether the watchdog has timed out.
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Returns:
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True if the watchdog has timed out, False otherwise.
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"""
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if self._timeout is None:
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return False
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return time.time() - self._start_time > self._timeout
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