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# distbuild/timer_event_source.py -- event source for timer events
#
# Copyright (C) 2012, 2014-2015 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, see <http://www.gnu.org/licenses/>.
import time
class Timer(object):
pass
class TimerEventSource(object):
def __init__(self, interval):
self.interval = interval
self.last_event = time.time()
self.enabled = False
def start(self):
self.enabled = True
self.last_event = time.time()
def stop(self):
self.enabled = False
def get_select_params(self):
if self.enabled:
next_event = self.last_event + self.interval
timeout = next_event - time.time()
return [], [], [], max(0, timeout)
else:
return [], [], [], None
def get_events(self, r, w, x):
if self.enabled:
now = time.time()
if now >= self.last_event + self.interval:
self.last_event = now
return [Timer()]
return []
def is_finished(self):
return False
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