.. _program_listing_file_include_tf2_visibility_control.h:

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

|exhale_lsh| :ref:`Return to documentation for file <file_include_tf2_visibility_control.h>` (``include/tf2/visibility_control.h``)

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

.. code-block:: cpp

   // Copyright 2017, Open Source Robotics Foundation, 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 Open Source Robotics Foundation 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.
   
   #ifndef TF2__VISIBILITY_CONTROL_H_
   #define TF2__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 TF2_EXPORT __attribute__ ((dllexport))
       #define TF2_IMPORT __attribute__ ((dllimport))
     #else
       #define TF2_EXPORT __declspec(dllexport)
       #define TF2_IMPORT __declspec(dllimport)
     #endif
     #ifdef TF2_BUILDING_DLL
       #define TF2_PUBLIC TF2_EXPORT
     #else
       #define TF2_PUBLIC TF2_IMPORT
     #endif
     #define TF2_PUBLIC_TYPE TF2_PUBLIC
     #define TF2_LOCAL
   #else
     #define TF2_EXPORT __attribute__ ((visibility("default")))
     #define TF2_IMPORT
     #if __GNUC__ >= 4
       #define TF2_PUBLIC __attribute__ ((visibility("default")))
       #define TF2_LOCAL  __attribute__ ((visibility("hidden")))
     #else
       #define TF2_PUBLIC
       #define TF2_LOCAL
     #endif
     #define TF2_PUBLIC_TYPE
   #endif
   
   #endif  // TF2__VISIBILITY_CONTROL_H_