1/*
2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * This file handles shared library symbol export decorations. It is recommended
26 * that all WebKit projects use these definitions so that symbol exports work
27 * properly on all platforms and compilers that WebKit builds under.
28 */
29
30#ifndef ExportMacros_h
31#define ExportMacros_h
32
33#include <wtf/Platform.h>
34
35// Different platforms have different defaults for symbol visibility. Usually
36// the compiler and the linker just take care of it. However for references to
37// runtime routines from JIT stubs, it matters to be able to declare a symbol as
38// being local to the target being generated, and thus not subject to (e.g.) ELF
39// symbol interposition rules.
40
41#if OS(WINDOWS)
42#define HAVE_INTERNAL_VISIBILITY 1
43#define WTF_INTERNAL
44#elif defined(__GNUC__) && !defined(__CC_ARM) && !defined(__ARMCC__)
45#define HAVE_INTERNAL_VISIBILITY 1
46#define WTF_INTERNAL __attribute__((visibility("hidden")))
47#else
48#define WTF_INTERNAL
49#endif
50
51#if OS(WINDOWS)
52
53#define WTF_EXPORT_DECLARATION __declspec(dllexport)
54#define WTF_IMPORT_DECLARATION __declspec(dllimport)
55#define WTF_HIDDEN_DECLARATION
56
57#elif defined(__GNUC__) && !defined(__CC_ARM) && !defined(__ARMCC__)
58
59#define WTF_EXPORT_DECLARATION __attribute__((visibility("default")))
60#define WTF_IMPORT_DECLARATION WTF_EXPORT_DECLARATION
61#define WTF_HIDDEN_DECLARATION __attribute__((visibility("hidden")))
62
63#else
64
65#define WTF_EXPORT_DECLARATION
66#define WTF_IMPORT_DECLARATION
67#define WTF_HIDDEN_DECLARATION
68
69#endif
70
71#if defined(BUILDING_WTF) || defined(STATICALLY_LINKED_WITH_WTF)
72#define WTF_IS_LINKED_IN_SAME_BINARY 1
73#endif
74
75// See note in wtf/Platform.h for more info on EXPORT_MACROS.
76#if USE(EXPORT_MACROS)
77
78#define WTF_EXPORT WTF_EXPORT_DECLARATION
79#define WTF_IMPORT WTF_IMPORT_DECLARATION
80#define WTF_HIDDEN WTF_IMPORT_DECLARATION
81
82// FIXME: When all ports are using the export macros, we should replace
83// WTF_EXPORTDATA with WTF_EXPORT_PRIVATE macros.
84#if defined(WTF_IS_LINKED_IN_SAME_BINARY)
85#define WTF_EXPORTDATA WTF_EXPORT
86#else
87#define WTF_EXPORTDATA WTF_IMPORT
88#endif
89
90#else // !USE(EXPORT_MACROS)
91
92#if OS(WINDOWS) && !COMPILER(GCC_OR_CLANG)
93#if defined(BUILDING_WTF) || defined(STATICALLY_LINKED_WITH_WTF)
94#define WTF_EXPORTDATA __declspec(dllexport)
95#else
96#define WTF_EXPORTDATA __declspec(dllimport)
97#endif
98#else // !OS(WINDOWS) || COMPILER(GCC_OR_CLANG)
99#define WTF_EXPORTDATA
100#endif
101
102#define WTF_EXPORTCLASS WTF_EXPORTDATA
103
104#define WTF_EXPORT
105#define WTF_IMPORT
106#define WTF_HIDDEN
107
108#endif // USE(EXPORT_MACROS)
109
110#if defined(WTF_IS_LINKED_IN_SAME_BINARY)
111#define WTF_EXPORT_PRIVATE WTF_EXPORT
112#else
113#define WTF_EXPORT_PRIVATE WTF_IMPORT
114#endif
115
116#define WTF_EXPORT_STRING_API WTF_EXPORT_PRIVATE
117
118#define WTF_EXPORT_HIDDEN WTF_HIDDEN
119
120#define HIDDEN_INLINE WTF_EXPORT_HIDDEN inline
121
122#endif // ExportMacros_h
123