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| 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 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. | |
| 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 defined(__GNUC__) && !defined(__CC_ARM) && !defined(__ARMCC__) | |
| 42 #define HAVE_INTERNAL_VISIBILITY 1 | |
| 43 #define WTF_INTERNAL __attribute__((visibility("hidden"))) | |
| 44 #else | |
| 45 #define WTF_INTERNAL | |
| 46 #endif | |
| 47 | |
| 48 #if defined(__GNUC__) && !defined(__CC_ARM) && !defined(__ARMCC__) | |
| 49 | |
| 50 #define WTF_EXPORT_DECLARATION __attribute__((visibility("default"))) | |
| 51 #define WTF_IMPORT_DECLARATION WTF_EXPORT_DECLARATION | |
| 52 #define WTF_HIDDEN_DECLARATION __attribute__((visibility("hidden"))) | |
| 53 | |
| 54 #else | |
| 55 | |
| 56 #define WTF_EXPORT_DECLARATION | |
| 57 #define WTF_IMPORT_DECLARATION | |
| 58 #define WTF_HIDDEN_DECLARATION | |
| 59 | |
| 60 #endif | |
| 61 | |
| 62 #if defined(BUILDING_WTF) || defined(STATICALLY_LINKED_WITH_WTF) | |
| 63 #define WTF_IS_LINKED_IN_SAME_BINARY 1 | |
| 64 #endif | |
| 65 | |
| 66 // See note in wtf/Platform.h for more info on EXPORT_MACROS. | |
| 67 #if USE(EXPORT_MACROS) | |
| 68 | |
| 69 #define WTF_EXPORT WTF_EXPORT_DECLARATION | |
| 70 #define WTF_IMPORT WTF_IMPORT_DECLARATION | |
| 71 #define WTF_HIDDEN WTF_IMPORT_DECLARATION | |
| 72 | |
| 73 // FIXME: When all ports are using the export macros, we should replace | |
| 74 // WTF_EXPORTDATA with WTF_EXPORT_PRIVATE macros. | |
| 75 #if defined(WTF_IS_LINKED_IN_SAME_BINARY) | |
| 76 #define WTF_EXPORTDATA WTF_EXPORT | |
| 77 #else | |
| 78 #define WTF_EXPORTDATA WTF_IMPORT | |
| 79 #endif | |
| 80 | |
| 81 #else // !USE(EXPORT_MACROS) | |
| 82 | |
| 83 #define WTF_EXPORTDATA | |
| 84 | |
| 85 #define WTF_EXPORTCLASS WTF_EXPORTDATA | |
| 86 | |
| 87 #define WTF_EXPORT | |
| 88 #define WTF_IMPORT | |
| 89 #define WTF_HIDDEN | |
| 90 | |
| 91 #endif // USE(EXPORT_MACROS) | |
| 92 | |
| 93 // WTF_TESTING (and WEBCORE_TESTING in PlatformExportMacros.h) is used for | |
| 94 // exporting symbols which are referred from WebCoreTestSupport library. | |
| 95 // Since the set of APIs is common between ports, | |
| 96 // it is rather worth annotating inside the code than maintaining port specific
export lists. | |
| 97 #if USE(EXPORT_MACROS_FOR_TESTING) | |
| 98 | |
| 99 #if defined(WTF_IS_LINKED_IN_SAME_BINARY) | |
| 100 #define WTF_TESTING WTF_EXPORT_DECLARATION | |
| 101 #else | |
| 102 #define WTF_TESTING WTF_IMPORT_DECLARATION | |
| 103 #endif | |
| 104 | |
| 105 #else // USE(EXPORT_MACROS_FOR_TESTING) | |
| 106 | |
| 107 #define WTF_TESTING | |
| 108 | |
| 109 #endif // USE(EXPORT_MACROS_FOR_TESTING) | |
| 110 | |
| 111 #if defined(WTF_IS_LINKED_IN_SAME_BINARY) | |
| 112 #define WTF_EXPORT_PRIVATE WTF_EXPORT | |
| 113 #else | |
| 114 #define WTF_EXPORT_PRIVATE WTF_IMPORT | |
| 115 #endif | |
| 116 | |
| 117 #define WTF_EXPORT_PRIVATE_RTTI | |
| 118 #define WTF_EXPORT_PRIVATE_NO_RTTI WTF_EXPORT_PRIVATE | |
| 119 | |
| 120 #define WTF_EXPORT_STRING_API WTF_EXPORT_PRIVATE | |
| 121 | |
| 122 #define WTF_EXPORT_HIDDEN WTF_HIDDEN | |
| 123 | |
| 124 #define HIDDEN_INLINE WTF_EXPORT_HIDDEN inline | |
| 125 | |
| 126 #endif // ExportMacros_h | |
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