1 # Copyright 2016 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 """Utilities for loading op libraries. 16 17 @@load_op_library 18 """ 19 from __future__ import absolute_import 20 from __future__ import division 21 from __future__ import print_function 22 23 import os 24 import re 25 26 from tensorflow.python.framework import load_library 27 from tensorflow.python.platform import resource_loader 28 29 30 def load_op_library(path): 31 """Loads a contrib op library from the given path. 32 33 NOTE(mrry): On Windows, we currently assume that some contrib op 34 libraries are statically linked into the main TensorFlow Python 35 extension DLL - use dynamically linked ops if the .so is present. 36 37 Args: 38 path: An absolute path to a shared object file. 39 40 Returns: 41 A Python module containing the Python wrappers for Ops defined in the 42 plugin. 43 """ 44 if os.name == 'nt': 45 # To avoid makeing every user_ops aware of windows, re-write 46 # the file extension from .so to .dll. 47 path = re.sub(r'\.so$', '.dll', path) 48 49 # Currently we have only some user_ops as dlls on windows - don't try 50 # to load them if the dll is not found. 51 # TODO(mrry): Once we have all of them this check should be removed. 52 if not os.path.exists(path): 53 return None 54 path = resource_loader.get_path_to_datafile(path) 55 ret = load_library.load_op_library(path) 56 assert ret, 'Could not load %s' % path 57 return ret 58
