2 * Copyright (C) 2011 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, 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 COMPUTER, 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.
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.
30 #ifndef ExportMacros_h
31 #define ExportMacros_h
33 #include <wtf/Platform.h>
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.
41 #if !PLATFORM(CHROMIUM) && OS(WINDOWS)
42 #define HAVE_INTERNAL_VISIBILITY 1
44 #elif defined(__GNUC__) && !defined(__CC_ARM) && !defined(__ARMCC__)
45 #define HAVE_INTERNAL_VISIBILITY 1
46 #define WTF_INTERNAL __attribute__((visibility("hidden")))
51 #if !PLATFORM(CHROMIUM) && OS(WINDOWS)
53 #define WTF_EXPORT_DECLARATION __declspec(dllexport)
54 #define WTF_IMPORT_DECLARATION __declspec(dllimport)
55 #define WTF_HIDDEN_DECLARATION
57 #elif defined(__GNUC__) && !defined(__CC_ARM) && !defined(__ARMCC__)
59 #define WTF_EXPORT_DECLARATION __attribute__((visibility("default")))
60 #define WTF_IMPORT_DECLARATION WTF_EXPORT_DECLARATION
61 #define WTF_HIDDEN_DECLARATION __attribute__((visibility("hidden")))
65 #define WTF_EXPORT_DECLARATION
66 #define WTF_IMPORT_DECLARATION
67 #define WTF_HIDDEN_DECLARATION
71 #if defined(BUILDING_WTF) || defined(STATICALLY_LINKED_WITH_WTF) || (PLATFORM(WX) && defined(BUILDING_JavaScriptCore))
72 #define WTF_IS_LINKED_IN_SAME_BINARY 1
75 // See note in wtf/Platform.h for more info on EXPORT_MACROS.
76 #if USE(EXPORT_MACROS)
78 #define WTF_EXPORT WTF_EXPORT_DECLARATION
79 #define WTF_IMPORT WTF_IMPORT_DECLARATION
80 #define WTF_HIDDEN WTF_IMPORT_DECLARATION
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
87 #define WTF_EXPORTDATA WTF_IMPORT
90 #else // !USE(EXPORT_MACROS)
92 #if !PLATFORM(CHROMIUM) && OS(WINDOWS) && !COMPILER(GCC)
93 #if defined(BUILDING_WTF) || defined(STATICALLY_LINKED_WITH_WTF)
94 #define WTF_EXPORTDATA __declspec(dllexport)
96 #define WTF_EXPORTDATA __declspec(dllimport)
98 #else // PLATFORM(CHROMIUM) || !OS(WINDOWS) || COMPILER(GCC)
99 #define WTF_EXPORTDATA
100 #endif // !PLATFORM(CHROMIUM)...
102 #define WTF_EXPORTCLASS WTF_EXPORTDATA
108 #endif // USE(EXPORT_MACROS)
110 // WTF_TESTING (and WEBCORE_TESTING in PlatformExportMacros.h) is used for
111 // exporting symbols which are referred from WebCoreTestSupport library.
112 // Since the set of APIs is common between ports,
113 // it is rather worth annotating inside the code than maintaining port specific export lists.
114 #if USE(EXPORT_MACROS_FOR_TESTING)
116 #if defined(WTF_IS_LINKED_IN_SAME_BINARY)
117 #define WTF_TESTING WTF_EXPORT_DECLARATION
119 #define WTF_TESTING WTF_IMPORT_DECLARATION
122 #else // USE(EXPORT_MACROS_FOR_TESTING)
126 #endif // USE(EXPORT_MACROS_FOR_TESTING)
128 #if defined(WTF_IS_LINKED_IN_SAME_BINARY)
129 #define WTF_EXPORT_PRIVATE WTF_EXPORT
131 #define WTF_EXPORT_PRIVATE WTF_IMPORT
134 // wxWebKit uses RTTI because wx itself does, so use a special macro for
135 // extra exports it needs.
137 #define WTF_EXPORT_PRIVATE_RTTI WTF_EXPORT_PRIVATE
138 #define WTF_EXPORT_PRIVATE_NO_RTTI
140 #define WTF_EXPORT_PRIVATE_RTTI
141 #define WTF_EXPORT_PRIVATE_NO_RTTI WTF_EXPORT_PRIVATE
144 #define WTF_EXPORT_HIDDEN WTF_HIDDEN
146 #define HIDDEN_INLINE WTF_EXPORT_HIDDEN inline
148 #endif // ExportMacros_h