text: //
  // Copyright 2016 Pixar
  //
  // Licensed under the Apache License, Version 2.0 (the "Apache License")
  // with the following modification; you may not use this file except in
  // compliance with the Apache License and the following modification to it:
  // Section 6. Trademarks. is deleted and replaced with:
  //
  // 6. Trademarks. This License does not grant permission to use the trade
  //    names, trademarks, service marks, or product names of the Licensor
  //    and its affiliates, except as required to comply with Section 4(c) of
  //    the License and to reproduce the content of the NOTICE file.
  //
  // You may obtain a copy of the Apache License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the Apache License with the above modification is
  // distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied. See the Apache License for the specific
  // language governing permissions and limitations under the Apache License.
  //
  #ifndef USDKATANA_LOCKS_H
  #define USDKATANA_LOCKS_H
  
  #include "pxr/pxr.h"
  #include <boost/thread/locks.hpp>
  #include <boost/thread/shared_mutex.hpp>
  
  PXR_NAMESPACE_OPEN_SCOPE
  
  
  boost::upgrade_mutex& UsdKatanaGetStageLock();
  boost::upgrade_mutex& UsdKatanaGetRendererCacheLock();
  boost::upgrade_mutex& UsdKatanaGetSessionCacheLock();
  
  
  PXR_NAMESPACE_CLOSE_SCOPE
  
  #endif //USDKATANA_LOCKS_H
  