rclcpp/rclcpp_components/include/rclcpp_components/visibility_control.hpp
Karsten Knese 50d500e84e
Make Component Manager public (#1065)
* make functions public & virtual

Signed-off-by: Karsten Knese <karsten@openrobotics.org>

* flexible resource index for cmake macros

Signed-off-by: Karsten Knese <karsten@openrobotics.org>

* review comments

Signed-off-by: Karsten Knese <karsten@openrobotics.org>

* remove superfluous include

Signed-off-by: Karsten Knese <karsten@openrobotics.org>

* remove wrong dllexort

Signed-off-by: Karsten Knese <karsten@openrobotics.org>

* check for empty plugin & executable args

Signed-off-by: Karsten Knese <karsten@openrobotics.org>

* remove commented lines

Signed-off-by: Karsten Knese <karsten@openrobotics.org>

* fix typo

Signed-off-by: Karsten Knese <karsten@openrobotics.org>

* relax macro constraints

Signed-off-by: Karsten Knese <karsten@openrobotics.org>
2020-04-15 19:08:04 -07:00

56 lines
2.3 KiB
C++

// Copyright 2020 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 RCLCPP_COMPONENTS__VISIBILITY_CONTROL_HPP_
#define RCLCPP_COMPONENTS__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 RCLCPP_COMPONENTS_EXPORT __attribute__ ((dllexport))
#define RCLCPP_COMPONENTS_IMPORT __attribute__ ((dllimport))
#else
#define RCLCPP_COMPONENTS_EXPORT __declspec(dllexport)
#define RCLCPP_COMPONENTS_IMPORT __declspec(dllimport)
#endif
#ifdef RCLCPP_COMPONENTS_BUILDING_LIBRARY
#define RCLCPP_COMPONENTS_PUBLIC RCLCPP_COMPONENTS_EXPORT
#else
#define RCLCPP_COMPONENTS_PUBLIC RCLCPP_COMPONENTS_IMPORT
#endif
#define RCLCPP_COMPONENTS_PUBLIC_TYPE RCLCPP_COMPONENTS_PUBLIC
#define RCLCPP_COMPONENTS_LOCAL
#else
#define RCLCPP_COMPONENTS_EXPORT __attribute__ ((visibility("default")))
#define RCLCPP_COMPONENTS_IMPORT
#if __GNUC__ >= 4
#define RCLCPP_COMPONENTS_PUBLIC __attribute__ ((visibility("default")))
#define RCLCPP_COMPONENTS_LOCAL __attribute__ ((visibility("hidden")))
#else
#define RCLCPP_COMPONENTS_PUBLIC
#define RCLCPP_COMPONENTS_LOCAL
#endif
#define RCLCPP_COMPONENTS_PUBLIC_TYPE
#endif
#endif // RCLCPP_COMPONENTS__VISIBILITY_CONTROL_HPP_