1# Copyright 2018 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"""Structures that allow uniform control over the dispatch process.""" 16 17import collections 18 19 20# TODO(mdan): This is where macro override controls fit. 21 22 23class DispatchContext(collections.namedtuple( 24 'DispatchContext', 25 ('options',))): 26 """Allows passing additional parameters to the specific implementations. 27 28 Attributes: 29 options: Optional dict of extra arguments that may be required by specific 30 implementations. 31 """ 32 33 def option(self, name): 34 return self.options[name] 35 36 37NO_CTX = DispatchContext(options={}) 38