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# -*- coding: utf-8 -*-
"""
debian-bts-applet - GNOME applet for monitoring Debian bugs
Copyright (C) 2008 Chris Lamb <chris@chris-lamb.co.uk>
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, either version 3 of the License, or
(at your option) any later version.
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 threading
class DownloadQueue(object):
def __init__(self, fn):
self.fn = fn
self._sem = threading.Semaphore(0)
self._lock = threading.Lock()
self._queue = []
self._threads = []
self._running = True
def enqueue(self, iter, bug_number):
self._lock.acquire()
self._queue.append((iter, bug_number))
self._lock.release()
self._sem.release()
def run(self, workers):
self._threads = [threading.Thread(target=self._loop) for num in range(workers)]
for thread in self._threads:
thread.start()
def stop(self):
self._running = False
for thread in self._threads:
self._sem.release()
def is_active(self):
return reduce(bool.__or__, [t.isAlive() for t in self._threads])
def _loop(self):
while self._running:
self._sem.acquire()
if not self._running: return
self._lock.acquire()
iter, bug_number = self._queue[0]
self._queue = self._queue[1:]
self._lock.release()
try:
self.fn(iter, bug_number)
except:
import traceback
traceback.print_exc()
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