ament_index_cpp  master
C++ API to access the ament resource index.
visibility_control.h
1 // Copyright 2015 Open Source Robotics Foundation, Inc.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef AMENT_INDEX_CPP__VISIBILITY_CONTROL_H_
16 #define AMENT_INDEX_CPP__VISIBILITY_CONTROL_H_
17 
18 #if __cplusplus
19 extern "C"
20 {
21 #endif
22 
23 // This logic was borrowed (then namespaced) from the examples on the gcc wiki:
24 // https://gcc.gnu.org/wiki/Visibility
25 
26 #if defined _WIN32 || defined __CYGWIN__
27  #ifdef __GNUC__
28  #define AMENT_INDEX_CPP_EXPORT __attribute__ ((dllexport))
29  #define AMENT_INDEX_CPP_IMPORT __attribute__ ((dllimport))
30  #else
31  #define AMENT_INDEX_CPP_EXPORT __declspec(dllexport)
32  #define AMENT_INDEX_CPP_IMPORT __declspec(dllimport)
33  #endif
34  #ifdef AMENT_INDEX_CPP_BUILDING_DLL
35  #define AMENT_INDEX_CPP_PUBLIC AMENT_INDEX_CPP_EXPORT
36  #else
37  #define AMENT_INDEX_CPP_PUBLIC AMENT_INDEX_CPP_IMPORT
38  #endif
39  #define AMENT_INDEX_CPP_LOCAL
40 #else
41  #define AMENT_INDEX_CPP_EXPORT __attribute__ ((visibility("default")))
42  #define AMENT_INDEX_CPP_IMPORT
43  #if __GNUC__ >= 4
44  #define AMENT_INDEX_CPP_PUBLIC __attribute__ ((visibility("default")))
45  #define AMENT_INDEX_CPP_LOCAL __attribute__ ((visibility("hidden")))
46  #else
47  #define AMENT_INDEX_CPP_PUBLIC
48  #define AMENT_INDEX_CPP_LOCAL
49  #endif
50 #endif
51 
52 #if __cplusplus
53 }
54 #endif
55 
56 #endif // AMENT_INDEX_CPP__VISIBILITY_CONTROL_H_