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# Copyright (C) 2011-2012 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import operator
import datetime
class Stopwatch(object):
def __init__(self):
self.ticks = {}
self.context_stack = []
def tick(self, reference_object, name):
if not reference_object in self.ticks:
self.ticks[reference_object] = {}
self.ticks[reference_object][name] = datetime.datetime.now()
def start(self, reference_object):
self.tick(reference_object, 'start')
def stop(self, reference_object):
self.tick(reference_object, 'stop')
def times(self, reference_object):
return self.ticks[reference_object]
def time(self, reference_object, name):
return self.ticks[reference_object][name]
def start_time(self, reference_object):
return self.ticks[reference_object]['start']
def stop_time(self, reference_object):
return self.ticks[reference_object]['stop']
def start_stop_delta(self, reference_object):
return (self.stop_time(reference_object) -
self.start_time(reference_object))
def start_stop_seconds(self, reference_object):
delta = self.start_stop_delta(reference_object)
return (delta.days * 24 * 3600 +
delta.seconds +
operator.truediv(delta.microseconds, 10 ** 6))
def __call__(self, reference_object):
self.context_stack.append(reference_object)
return self
def __enter__(self):
self.start(self.context_stack[-1])
return self
def __exit__(self, *args):
self.stop(self.context_stack[-1])
self.context_stack.pop()
return False # cause any exception to be re-raised
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