.. _program_listing_file__tmp_ws_src_turtlebot3_manipulation_turtlebot3_manipulation_hardware_include_turtlebot3_manipulation_hardware_visibility_control.h:

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

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_turtlebot3_manipulation_turtlebot3_manipulation_hardware_include_turtlebot3_manipulation_hardware_visibility_control.h>` (``/tmp/ws/src/turtlebot3_manipulation/turtlebot3_manipulation_hardware/include/turtlebot3_manipulation_hardware/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.
   
   /* This header must be included by all rclcpp headers which declare symbols
    * which are defined in the rclcpp library. When not building the rclcpp
    * library, i.e. when using the headers in other package's code, the contents
    * of this header change the visibility of certain symbols which the rclcpp
    * library cannot have, but the consuming code must have inorder to link.
    */
   
   #ifndef TURTLEBOT3_MANIPULATION_HARDWARE__VISIBILITY_CONTROL_H_
   #define TURTLEBOT3_MANIPULATION_HARDWARE__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 TURTLEBOT3_MANIPULATION_HARDWARE_EXPORT __attribute__((dllexport))
   #define TURTLEBOT3_MANIPULATION_HARDWARE_IMPORT __attribute__((dllimport))
   #else
   #define TURTLEBOT3_MANIPULATION_HARDWARE_EXPORT __declspec(dllexport)
   #define TURTLEBOT3_MANIPULATION_HARDWARE_IMPORT __declspec(dllimport)
   #endif
   #ifdef TURTLEBOT3_MANIPULATION_HARDWARE_BUILDING_DLL
   #define TURTLEBOT3_MANIPULATION_HARDWARE_PUBLIC TURTLEBOT3_MANIPULATION_HARDWARE_EXPORT
   #else
   #define TURTLEBOT3_MANIPULATION_HARDWARE_PUBLIC TURTLEBOT3_MANIPULATION_HARDWARE_IMPORT
   #endif
   #define TURTLEBOT3_MANIPULATION_HARDWARE_PUBLIC_TYPE TURTLEBOT3_MANIPULATION_HARDWARE_PUBLIC
   #define TURTLEBOT3_MANIPULATION_HARDWARE_LOCAL
   #else
   #define TURTLEBOT3_MANIPULATION_HARDWARE_EXPORT __attribute__((visibility("default")))
   #define TURTLEBOT3_MANIPULATION_HARDWARE_IMPORT
   #if __GNUC__ >= 4
   #define TURTLEBOT3_MANIPULATION_HARDWARE_PUBLIC __attribute__((visibility("default")))
   #define TURTLEBOT3_MANIPULATION_HARDWARE_LOCAL __attribute__((visibility("hidden")))
   #else
   #define TURTLEBOT3_MANIPULATION_HARDWARE_PUBLIC
   #define TURTLEBOT3_MANIPULATION_HARDWARE_LOCAL
   #endif
   #define TURTLEBOT3_MANIPULATION_HARDWARE_PUBLIC_TYPE
   #endif
   
   #endif  // TURTLEBOT3_MANIPULATION_HARDWARE__VISIBILITY_CONTROL_H_