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39 lines
1.2 KiB
Python
39 lines
1.2 KiB
Python
# Copyright (c) Quectel Wireless Solution, Co., Ltd.All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import _thread
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class Singleton(object):
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_instance_lock = _thread.allocate_lock()
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def __init__(self, *args, **kwargs):
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pass
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def __new__(cls, *args, **kwargs):
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if not hasattr(cls, 'instance_dict'):
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Singleton.instance_dict = {}
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if str(cls) not in Singleton.instance_dict.keys():
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with Singleton._instance_lock:
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_instance = super().__new__(cls)
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Singleton.instance_dict[str(cls)] = _instance
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return Singleton.instance_dict[str(cls)]
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def numiter():
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for i in range(99999):
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yield i
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