.. _program_listing_file_include_urdf_visibility_control.hpp:

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

|exhale_lsh| :ref:`Return to documentation for file <file_include_urdf_visibility_control.hpp>` (``include/urdf/visibility_control.hpp``)

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

.. code-block:: cpp

   // Copyright (c) 2017, Willow Garage, Inc.
   // All rights reserved.
   //
   // Redistribution and use in source and binary forms, with or without
   // modification, are permitted provided that the following conditions are met:
   //
   //    * Redistributions of source code must retain the above copyright
   //      notice, this list of conditions and the following disclaimer.
   //
   //    * Redistributions in binary form must reproduce the above copyright
   //      notice, this list of conditions and the following disclaimer in the
   //      documentation and/or other materials provided with the distribution.
   //
   //    * Neither the name of the copyright holder nor the names of its
   //      contributors may be used to endorse or promote products derived from
   //      this software without specific prior written permission.
   //
   // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   // POSSIBILITY OF SUCH DAMAGE.
   
   /* This header must be included by all urdf headers which declare symbols
    * which are defined in the urdf library. When not building the urdf
    * 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 urdf
    * library cannot have, but the consuming code must have inorder to link.
    */
   
   #ifndef URDF__VISIBILITY_CONTROL_HPP_
   #define URDF__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 URDF_EXPORT __attribute__ ((dllexport))
       #define URDF_IMPORT __attribute__ ((dllimport))
     #else
       #define URDF_EXPORT __declspec(dllexport)
       #define URDF_IMPORT __declspec(dllimport)
     #endif
     #ifdef URDF_BUILDING_LIBRARY
       #define URDF_PUBLIC URDF_EXPORT
     #else
       #define URDF_PUBLIC URDF_IMPORT
     #endif
     #define URDF_PUBLIC_TYPE URDF_PUBLIC
     #define URDF_LOCAL
   #else
     #define URDF_EXPORT __attribute__ ((visibility("default")))
     #define URDF_IMPORT
     #if __GNUC__ >= 4
       #define URDF_PUBLIC __attribute__ ((visibility("default")))
       #define URDF_LOCAL  __attribute__ ((visibility("hidden")))
     #else
       #define URDF_PUBLIC
       #define URDF_LOCAL
     #endif
     #define URDF_PUBLIC_TYPE
   #endif
   
   #endif  // URDF__VISIBILITY_CONTROL_HPP_