1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements. See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership. The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License. You may obtain a copy of the License at
8//
9// http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied. See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18#ifndef ARROW_UTIL_VISIBILITY_H
19#define ARROW_UTIL_VISIBILITY_H
20
21#if defined(_WIN32) || defined(__CYGWIN__)
22#if defined(_MSC_VER)
23#pragma warning(disable : 4251)
24#else
25#pragma GCC diagnostic ignored "-Wattributes"
26#endif
27
28#ifdef ARROW_STATIC
29#define ARROW_EXPORT
30#elif defined(ARROW_EXPORTING)
31#define ARROW_EXPORT __declspec(dllexport)
32#else
33#define ARROW_EXPORT __declspec(dllimport)
34#endif
35
36#define ARROW_NO_EXPORT
37#else // Not Windows
38#ifndef ARROW_EXPORT
39#define ARROW_EXPORT __attribute__((visibility("default")))
40#endif
41#ifndef ARROW_NO_EXPORT
42#define ARROW_NO_EXPORT __attribute__((visibility("hidden")))
43#endif
44#endif // Non-Windows
45
46// This is a complicated topic, some reading on it:
47// http://www.codesynthesis.com/~boris/blog/2010/01/18/dll-export-cxx-templates/
48#if defined(_MSC_VER) || defined(__clang__)
49#define ARROW_TEMPLATE_CLASS_EXPORT
50#define ARROW_TEMPLATE_EXPORT ARROW_EXPORT
51#else
52#define ARROW_TEMPLATE_CLASS_EXPORT ARROW_EXPORT
53#define ARROW_TEMPLATE_EXPORT
54#endif
55
56#endif // ARROW_UTIL_VISIBILITY_H
57