33 lines
1.2 KiB
Python
33 lines
1.2 KiB
Python
# Copyright 2020 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import ctypes
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from ctypes import util as ctypes_util
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_CDLL = None
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def get_cdll():
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global _CDLL
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if not _CDLL:
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# NOTE(ralonsoh): from https://docs.python.org/3.6/library/
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# ctypes.html#ctypes.PyDLL: "Instances of this class behave like CDLL
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# instances, except that the Python GIL is not released during the
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# function call, and after the function execution the Python error
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# flag is checked."
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# Check https://bugs.launchpad.net/neutron/+bug/1870352
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_CDLL = ctypes.PyDLL(ctypes_util.find_library('c'), use_errno=True)
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return _CDLL
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