Program Listing for File visibility_control.h

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// 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
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// 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_