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Copy pathdecorator_set.py
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50 lines (36 loc) · 1.27 KB
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# _*_ coding:utf-8 _*_
"""
cited from stack overflow
thread safe set, by decorator
"""
from threading import Lock
def locked_method(method):
"""Method decorator. Requires a lock object at self._lock"""
def newmethod(self, *args, **kwargs):
with self._lock:
return method(self, *args, **kwargs)
return newmethod
class DecoratorLockedSet(set):
def __init__(self, *args, **kwargs):
self._lock = Lock()
super(DecoratorLockedSet, self).__init__(*args, **kwargs)
@locked_method
def add(self, *args, **kwargs):
return super(DecoratorLockedSet, self).add(args, kwargs)
@locked_method
def remove(self, *args, **kwargs):
return super(DecoratorLockedSet, self).remove(args, kwargs)
class LockedSet(set):
"""A set where add(), remove(), and 'in' operator are thread-safe"""
def __init__(self, *args, **kwargs):
self._lock = Lock()
super(LockedSet, self).__init__(*args, **kwargs)
def add(self, elem):
with self._lock:
super(LockedSet, self).add(elem)
def remove(self, elem):
with self._lock:
super(LockedSet, self).remove(elem)
def __contains__(self, elem):
with self._lock:
super(LockedSet, self).__contains__(elem)