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Side by Side Diff: build/android/pylib/utils/watchdog_timer.py

Issue 2101243005: Add a snapshot of flutter/engine/src/build to our sdk (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: add README.dart Created 4 years, 5 months ago
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1 # Copyright 2013 The Chromium Authors. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file.
4
5 """WatchdogTimer timeout objects."""
6
7 import time
8
9
10 class WatchdogTimer(object):
11 """A resetable timeout-based watchdog.
12
13 This object is threadsafe.
14 """
15
16 def __init__(self, timeout):
17 """Initializes the watchdog.
18
19 Args:
20 timeout: The timeout in seconds. If timeout is None it will never timeout.
21 """
22 self._start_time = time.time()
23 self._timeout = timeout
24
25 def Reset(self):
26 """Resets the timeout countdown."""
27 self._start_time = time.time()
28
29 def GetElapsed(self):
30 """Returns the elapsed time of the watchdog."""
31 return time.time() - self._start_time
32
33 def GetRemaining(self):
34 """Returns the remaining time of the watchdog."""
35 if self._timeout:
36 return self._timeout - self.GetElapsed()
37 else:
38 return None
39
40 def IsTimedOut(self):
41 """Whether the watchdog has timed out.
42
43 Returns:
44 True if the watchdog has timed out, False otherwise.
45 """
46 remaining = self.GetRemaining()
47 return remaining is not None and remaining < 0
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