/usr/lib/python2.7/dist-packages/Xlib/support/lock.py is in python-xlib 0.20-3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | # Xlib.support.lock -- allocate a lock
#
# Copyright (C) 2000 Peter Liljenberg <petli@ctrl-c.liu.se>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation; either version 2.1
# of the License, or (at your option) any later version.
#
# This library 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc.,
# 59 Temple Place,
# Suite 330,
# Boston, MA 02111-1307 USA
class _DummyLock(object):
def __init__(self):
# This might be nerdy, but by assigning methods like this
# instead of defining them all, we create a single bound
# method object once instead of one each time one of the
# methods is called.
# This gives some speed improvements which should reduce the
# impact of the threading infrastructure in the regular code,
# when not using threading.
self.acquire = self.release = self.locked = self.__noop
def __noop(self, *args):
return
# More optimisations: we use a single lock for all lock instances
_dummy_lock = _DummyLock()
def allocate_lock():
return _dummy_lock
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