.. _program_listing_file__tmp_ws_src_ros2_socketcan_ros2_socketcan_include_ros2_socketcan_visibility_control.hpp:

Program Listing for File visibility_control.hpp
===============================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_ros2_socketcan_ros2_socketcan_include_ros2_socketcan_visibility_control.hpp>` (``/tmp/ws/src/ros2_socketcan/ros2_socketcan/include/ros2_socketcan/visibility_control.hpp``)

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

.. code-block:: cpp

   // Copyright 2021 the Autoware Foundation
   //
   // 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.
   //
   // Co-developed by Tier IV, Inc. and Apex.AI, Inc.
   #ifndef ROS2_SOCKETCAN__VISIBILITY_CONTROL_HPP_
   #define ROS2_SOCKETCAN__VISIBILITY_CONTROL_HPP_
   
   // 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 SOCKETCAN_EXPORT __attribute__ ((dllexport))
       #define SOCKETCAN_IMPORT __attribute__ ((dllimport))
     #else
       #define SOCKETCAN_EXPORT __declspec(dllexport)
       #define SOCKETCAN_IMPORT __declspec(dllimport)
     #endif
     #ifdef SOCKETCAN_BUILDING_LIBRARY
       #define SOCKETCAN_PUBLIC SOCKETCAN_EXPORT
     #else
       #define SOCKETCAN_PUBLIC SOCKETCAN_IMPORT
     #endif
     #define SOCKETCAN_PUBLIC_TYPE SOCKETCAN_PUBLIC
     #define SOCKETCAN_LOCAL
   #else
     #define SOCKETCAN_EXPORT __attribute__ ((visibility("default")))
     #define SOCKETCAN_IMPORT
     #if __GNUC__ >= 4
       #define SOCKETCAN_PUBLIC __attribute__ ((visibility("default")))
       #define SOCKETCAN_LOCAL  __attribute__ ((visibility("hidden")))
     #else
       #define SOCKETCAN_PUBLIC
       #define SOCKETCAN_LOCAL
     #endif
     #define SOCKETCAN_PUBLIC_TYPE
   #endif
   
   #endif  // ROS2_SOCKETCAN__VISIBILITY_CONTROL_HPP_