.. _program_listing_file_include_controller_interface_visibility_control.h:

Program Listing for File visibility_control.h
=============================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_controller_interface_visibility_control.h>` (``include/controller_interface/visibility_control.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2017 Open Source Robotics Foundation, Inc.
   //
   // 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.
   
   #ifndef CONTROLLER_INTERFACE__VISIBILITY_CONTROL_H_
   #define CONTROLLER_INTERFACE__VISIBILITY_CONTROL_H_
   
   // This logic was borrowed (then namespaced) from the examples on the gcc wiki:
   //     https://gcc.gnu.org/wiki/Visibility
   
   #if defined _WIN32 || defined __CYGWIN__
   #ifdef __GNUC__
   #define CONTROLLER_INTERFACE_EXPORT __attribute__((dllexport))
   #define CONTROLLER_INTERFACE_IMPORT __attribute__((dllimport))
   #else
   #define CONTROLLER_INTERFACE_EXPORT __declspec(dllexport)
   #define CONTROLLER_INTERFACE_IMPORT __declspec(dllimport)
   #endif
   #ifdef CONTROLLER_INTERFACE_BUILDING_DLL
   #define CONTROLLER_INTERFACE_PUBLIC CONTROLLER_INTERFACE_EXPORT
   #else
   #define CONTROLLER_INTERFACE_PUBLIC CONTROLLER_INTERFACE_IMPORT
   #endif
   #define CONTROLLER_INTERFACE_PUBLIC_TYPE CONTROLLER_INTERFACE_PUBLIC
   #define CONTROLLER_INTERFACE_LOCAL
   #else
   #define CONTROLLER_INTERFACE_EXPORT __attribute__((visibility("default")))
   #define CONTROLLER_INTERFACE_IMPORT
   #if __GNUC__ >= 4
   #define CONTROLLER_INTERFACE_PUBLIC __attribute__((visibility("default")))
   #define CONTROLLER_INTERFACE_LOCAL __attribute__((visibility("hidden")))
   #else
   #define CONTROLLER_INTERFACE_PUBLIC
   #define CONTROLLER_INTERFACE_LOCAL
   #endif
   #define CONTROLLER_INTERFACE_PUBLIC_TYPE
   #endif
   
   #endif  // CONTROLLER_INTERFACE__VISIBILITY_CONTROL_H_