.. _program_listing_file__tmp_ws_src_picknik_controllers_picknik_twist_controller_include_picknik_twist_controller_visibility_control.h:

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

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_picknik_controllers_picknik_twist_controller_include_picknik_twist_controller_visibility_control.h>` (``/tmp/ws/src/picknik_controllers/picknik_twist_controller/include/picknik_twist_controller/visibility_control.h``)

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

.. code-block:: cpp

   // Copyright 2021, PickNik 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 PICKNIK_TWIST_CONTROLLER__VISIBILITY_CONTROL_H_
   #define PICKNIK_TWIST_CONTROLLER__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 PICKNIK_TWIST_CONTROLLER_EXPORT __attribute__((dllexport))
   #define PICKNIK_TWIST_CONTROLLER_IMPORT __attribute__((dllimport))
   #else
   #define PICKNIK_TWIST_CONTROLLER_EXPORT __declspec(dllexport)
   #define PICKNIK_TWIST_CONTROLLER_IMPORT __declspec(dllimport)
   #endif
   #ifdef PICKNIK_TWIST_CONTROLLER_BUILDING_LIBRARY
   #define PICKNIK_TWIST_CONTROLLER_PUBLIC PICKNIK_TWIST_CONTROLLER_EXPORT
   #else
   #define PICKNIK_TWIST_CONTROLLER_PUBLIC PICKNIK_TWIST_CONTROLLER_IMPORT
   #endif
   #define PICKNIK_TWIST_CONTROLLER_PUBLIC_TYPE PICKNIK_TWIST_CONTROLLER_PUBLIC
   #define PICKNIK_TWIST_CONTROLLER_LOCAL
   #else
   #define PICKNIK_TWIST_CONTROLLER_EXPORT __attribute__((visibility("default")))
   #define PICKNIK_TWIST_CONTROLLER_IMPORT
   #if __GNUC__ >= 4
   #define PICKNIK_TWIST_CONTROLLER_PUBLIC __attribute__((visibility("default")))
   #define PICKNIK_TWIST_CONTROLLER_LOCAL __attribute__((visibility("hidden")))
   #else
   #define PICKNIK_TWIST_CONTROLLER_PUBLIC
   #define PICKNIK_TWIST_CONTROLLER_LOCAL
   #endif
   #define PICKNIK_TWIST_CONTROLLER_PUBLIC_TYPE
   #endif
   
   #endif  // PICKNIK_TWIST_CONTROLLER__VISIBILITY_CONTROL_H_