68 lines
2.0 KiB
Python
68 lines
2.0 KiB
Python
# Copyright 2017 Catalyst IT Limited
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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 threading
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from eventlet import corolocal
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_th_loc_storage = threading.local()
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def _get_greenlet_local_storage():
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greenlet_id = corolocal.get_ident()
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greenlet_locals = getattr(_th_loc_storage, "greenlet_locals", None)
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if not greenlet_locals:
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greenlet_locals = {}
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_th_loc_storage.greenlet_locals = greenlet_locals
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if greenlet_id in greenlet_locals:
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return greenlet_locals[greenlet_id]
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else:
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return None
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def has_thread_local(var_name):
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gl_storage = _get_greenlet_local_storage()
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return gl_storage and var_name in gl_storage
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def get_thread_local(var_name):
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if not has_thread_local(var_name):
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return None
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return _get_greenlet_local_storage()[var_name]
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def set_thread_local(var_name, val):
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if val is None and has_thread_local(var_name):
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gl_storage = _get_greenlet_local_storage()
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# Delete variable from greenlet local storage.
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if gl_storage:
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del gl_storage[var_name]
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# Delete the entire greenlet local storage from thread local storage.
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if gl_storage and len(gl_storage) == 0:
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del _th_loc_storage.greenlet_locals[corolocal.get_ident()]
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if val is not None:
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gl_storage = _get_greenlet_local_storage()
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if not gl_storage:
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gl_storage = _th_loc_storage.greenlet_locals[
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corolocal.get_ident()] = {}
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gl_storage[var_name] = val
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