Caffe2 - Python API
A deep learning, cross platform ML framework
extension_loader.py
1 # Copyright (c) 2016-present, Facebook, Inc.
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 
16 ## @package extension_loader
17 # Module caffe2.python.extension_loader
18 from __future__ import absolute_import
19 from __future__ import division
20 from __future__ import print_function
21 from __future__ import unicode_literals
22 import contextlib
23 import ctypes
24 import sys
25 
26 
27 _set_global_flags = (
28  hasattr(sys, 'getdlopenflags') and hasattr(sys, 'setdlopenflags'))
29 
30 
31 @contextlib.contextmanager
32 def DlopenGuard():
33  if _set_global_flags:
34  old_flags = sys.getdlopenflags()
35  sys.setdlopenflags(old_flags | ctypes.RTLD_GLOBAL)
36  yield
37  if _set_global_flags:
38  sys.setdlopenflags(old_flags)