rmw_dds_common
master
Define a common interface between DDS implementations of ROS middleware.
include
rmw_dds_common
visibility_control.h
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// Copyright 2019 Open Source Robotics Foundation, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef RMW_DDS_COMMON__VISIBILITY_CONTROL_H_
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#define RMW_DDS_COMMON__VISIBILITY_CONTROL_H_
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#ifdef __cplusplus
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extern
"C"
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{
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#endif
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// This logic was borrowed (then namespaced) from the examples on the gcc wiki:
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// https://gcc.gnu.org/wiki/Visibility
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#if defined _WIN32 || defined __CYGWIN__
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#ifdef __GNUC__
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#define RMW_DDS_COMMON_EXPORT __attribute__ ((dllexport))
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#define RMW_DDS_COMMON_IMPORT __attribute__ ((dllimport))
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#else
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#define RMW_DDS_COMMON_EXPORT __declspec(dllexport)
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#define RMW_DDS_COMMON_IMPORT __declspec(dllimport)
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#endif
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#ifdef RMW_DDS_COMMON_BUILDING_LIBRARY
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#define RMW_DDS_COMMON_PUBLIC RMW_DDS_COMMON_EXPORT
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#else
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#define RMW_DDS_COMMON_PUBLIC RMW_DDS_COMMON_IMPORT
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#endif
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#define RMW_DDS_COMMON_PUBLIC_TYPE RMW_DDS_COMMON_PUBLIC
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#define RMW_DDS_COMMON_LOCAL
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#else
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#define RMW_DDS_COMMON_EXPORT __attribute__ ((visibility("default")))
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#define RMW_DDS_COMMON_IMPORT
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#if __GNUC__ >= 4
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#define RMW_DDS_COMMON_PUBLIC __attribute__ ((visibility("default")))
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#define RMW_DDS_COMMON_LOCAL __attribute__ ((visibility("hidden")))
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#else
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#define RMW_DDS_COMMON_PUBLIC
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#define RMW_DDS_COMMON_LOCAL
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#endif
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#define RMW_DDS_COMMON_PUBLIC_TYPE
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif // RMW_DDS_COMMON__VISIBILITY_CONTROL_H_
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