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""" Timer-related utilities for CTS """
__all__ = ["Timer"]
__copyright__ = "Copyright 2000-2023 the Pacemaker project contributors"
__license__ = "GNU General Public License version 2 or later (GPLv2+) WITHOUT ANY WARRANTY"
import time
class Timer:
""" A class for measuring the runtime of some task. A Timer may be used
manually or as a context manager, like so:
with Timer(logger, "SomeTest", "SomeTimer"):
...
A Timer runs from when start() is called until the timer is deleted
or reset() is called. There is no explicit stop method.
"""
def __init__(self, logger, test_name, timer_name):
""" Create a new Timer instance.
Arguments:
logger -- A Logger instance that can be used to record when
the timer stopped
test_name -- The name of the test this timer is being run for
timer_name -- The name of this timer
"""
self._logger = logger
self._start_time = None
self._test_name = test_name
self._timer_name = timer_name
def __enter__(self):
self.start()
return self
def __exit__(self, *args):
self._logger.debug("%s:%s runtime: %.2f" % (self._test_name, self._timer_name, self.elapsed))
def reset(self):
""" Restart the timer """
self.start()
def start(self):
""" Start the timer """
self._start_time = time.time()
@property
def start_time(self):
""" When did the timer start? """
return self._start_time
@property
def elapsed(self):
""" How long has the timer been running for? """
return time.time() - self._start_time
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