71 lines
2.1 KiB
Python
71 lines
2.1 KiB
Python
#!/usr/bin/python3
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## system-config-printer
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## Copyright (C) 2010, 2011, 2012, 2013, 2014 Red Hat, Inc.
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## Authors:
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## Tim Waugh <twaugh@redhat.com>
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, write to the Free Software
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## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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import threading
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from gi.repository import GLib
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from debug import *
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class KillTimer:
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def __init__ (self, timeout=30, killfunc=None):
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self._timeout = timeout
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self._killfunc = killfunc
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self._holds = 0
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self._add_timeout ()
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self._lock = threading.Lock()
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def _add_timeout (self):
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self._timer = GLib.timeout_add_seconds (self._timeout, self._kill)
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def _kill (self):
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debugprint ("Timeout (%ds), exiting" % self._timeout)
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if self._killfunc:
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self._killfunc ()
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else:
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sys.exit (0)
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def add_hold (self):
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self._lock.acquire()
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if self._holds == 0:
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debugprint ("Kill timer stopped")
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GLib.source_remove (self._timer)
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self._holds += 1
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self._lock.release()
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def remove_hold (self):
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self._lock.acquire()
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if self._holds > 0:
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self._holds -= 1
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if self._holds == 0:
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debugprint ("Kill timer started")
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self._add_timeout ()
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self._lock.release()
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def alive (self):
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self._lock.acquire()
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if self._holds == 0:
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GLib.source_remove (self._timer)
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self._add_timeout ()
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self._lock.release()
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