In tf.contrib, only load external op libraries on non-Windows platforms.

This enables tf.contrib to be used on Windows, which does not currently
support the TensorFlow plugin mechanism.
Change: 136550845

1 files changed, 47 insertions, 0 deletions

diff --git a/tensorflow/contrib/util/loader.py b/tensorflow/contrib/util/loader.py
new file mode 100644
index 0000000000..6f690f414a
--- /dev/null
+++ b/tensorflow/contrib/util/loader.py
@@ -0,0 +1,47 @@
+# Copyright 2016 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+"""Utilities for loading op libraries."""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+
+from tensorflow.python.framework import load_library
+from tensorflow.python.platform import resource_loader
+
+
+def load_op_library(path):
+  """Loads a contrib op library from the given path.
+
+  NOTE(mrry): On Windows, we currently assume that contrib op
+  libraries are statically linked into the main TensorFlow Python
+  extension DLL.
+
+  Args:
+    path: An absolute path to a shared object file.
+
+  Returns:
+    A Python module containing the Python wrappers for Ops defined in the
+    plugin.
+  """
+  if os.name != 'nt':
+    path = resource_loader.get_path_to_datafile(path)
+    ret = load_library.load_op_library(path)
+    assert ret, 'Could not load %s' % path
+    return ret
+  else:
+    # NOTE(mrry):
+    return None