1# Copyright 2020 The TensorFlow Authors. All Rights Reserved. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14# ============================================================================== 15"""Context for storing options for loading a SavedModel.""" 16 17import contextlib 18import threading 19 20 21class LoadContext(threading.local): 22 """A context for loading a model.""" 23 24 def __init__(self): 25 super(LoadContext, self).__init__() 26 self._entered_load_context = [] 27 self._load_options = None 28 29 def set_load_options(self, load_options): 30 self._load_options = load_options 31 self._entered_load_context.append(True) 32 33 def clear_load_options(self): 34 self._load_options = None 35 self._entered_load_context.pop() 36 37 def load_options(self): 38 return self._load_options 39 40 def in_load_context(self): 41 return self._entered_load_context 42 43 44_load_context = LoadContext() 45 46 47@contextlib.contextmanager 48def load_context(load_options): 49 _load_context.set_load_options(load_options) 50 try: 51 yield 52 finally: 53 _load_context.clear_load_options() 54 55 56def get_load_options(): 57 """Returns the load options under a load context.""" 58 return _load_context.load_options() 59 60 61def in_load_context(): 62 """Returns whether under a load context.""" 63 return _load_context.in_load_context() 64