| 1 | /* |
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| 2 | * Copyright (C) 2011, 2012 Apple Inc. All rights reserved. |
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| 3 | * |
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| 4 | * Redistribution and use in source and binary forms, with or without |
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| 5 | * modification, are permitted provided that the following conditions |
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| 6 | * are met: |
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| 7 | * 1. Redistributions of source code must retain the above copyright |
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| 8 | * notice, this list of conditions and the following disclaimer. |
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| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer in the |
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| 11 | * documentation and/or other materials provided with the distribution. |
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| 12 | * |
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| 13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
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| 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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| 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
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| 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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| 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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| 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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| 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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| 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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| 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 24 | */ |
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| 25 | |
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| 26 | #ifndef WTF_Compiler_h |
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| 27 | #define WTF_Compiler_h |
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| 28 | |
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| 29 | /* COMPILER() - the compiler being used to build the project */ |
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| 30 | #define COMPILER(WTF_FEATURE) (defined WTF_COMPILER_##WTF_FEATURE && WTF_COMPILER_##WTF_FEATURE) |
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| 31 | |
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| 32 | /* COMPILER_SUPPORTS() - whether the compiler being used to build the project supports the given feature. */ |
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| 33 | #define COMPILER_SUPPORTS(WTF_COMPILER_FEATURE) (defined WTF_COMPILER_SUPPORTS_##WTF_COMPILER_FEATURE && WTF_COMPILER_SUPPORTS_##WTF_COMPILER_FEATURE) |
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| 34 | |
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| 35 | /* COMPILER_QUIRK() - whether the compiler being used to build the project requires a given quirk. */ |
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| 36 | #define COMPILER_QUIRK(WTF_COMPILER_QUIRK) (defined WTF_COMPILER_QUIRK_##WTF_COMPILER_QUIRK && WTF_COMPILER_QUIRK_##WTF_COMPILER_QUIRK) |
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| 37 | |
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| 38 | /* ==== COMPILER() - the compiler being used to build the project ==== */ |
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| 39 | |
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| 40 | /* COMPILER(CLANG) - Clang */ |
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| 41 | #if defined(__clang__) |
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| 42 | #define WTF_COMPILER_CLANG 1 |
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| 43 | |
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| 44 | #ifndef __has_extension |
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| 45 | #define __has_extension __has_feature /* Compatibility with older versions of clang */ |
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| 46 | #endif |
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| 47 | |
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| 48 | #define CLANG_PRAGMA(PRAGMA) _Pragma(PRAGMA) |
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| 49 | |
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| 50 | /* Specific compiler features */ |
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| 51 | #define WTF_COMPILER_SUPPORTS_CXX_VARIADIC_TEMPLATES __has_extension(cxx_variadic_templates) |
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| 52 | |
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| 53 | /* There is a bug in clang that comes with Xcode 4.2 where AtomicStrings can't be implicitly converted to Strings |
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| 54 | in the presence of move constructors and/or move assignment operators. This bug has been fixed in Xcode 4.3 clang, so we |
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| 55 | check for both cxx_rvalue_references as well as the unrelated cxx_nonstatic_member_init feature which we know was added in 4.3 */ |
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| 56 | #define WTF_COMPILER_SUPPORTS_CXX_RVALUE_REFERENCES __has_extension(cxx_rvalue_references) && __has_extension(cxx_nonstatic_member_init) |
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| 57 | |
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| 58 | #define WTF_COMPILER_SUPPORTS_CXX_DELETED_FUNCTIONS __has_extension(cxx_deleted_functions) |
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| 59 | #define WTF_COMPILER_SUPPORTS_CXX_NULLPTR __has_feature(cxx_nullptr) |
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| 60 | #define WTF_COMPILER_SUPPORTS_CXX_EXPLICIT_CONVERSIONS __has_feature(cxx_explicit_conversions) |
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| 61 | #define WTF_COMPILER_SUPPORTS_BLOCKS __has_feature(blocks) |
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| 62 | #define WTF_COMPILER_SUPPORTS_C_STATIC_ASSERT __has_extension(c_static_assert) |
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| 63 | #define WTF_COMPILER_SUPPORTS_CXX_STATIC_ASSERT __has_extension(cxx_static_assert) |
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| 64 | #define WTF_COMPILER_SUPPORTS_CXX_OVERRIDE_CONTROL __has_extension(cxx_override_control) |
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| 65 | #define WTF_COMPILER_SUPPORTS_HAS_TRIVIAL_DESTRUCTOR __has_extension(has_trivial_destructor) |
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| 66 | #define WTF_COMPILER_SUPPORTS_CXX_STRONG_ENUMS __has_extension(cxx_strong_enums) |
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| 67 | |
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| 68 | #endif |
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| 69 | |
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| 70 | #ifndef CLANG_PRAGMA |
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| 71 | #define CLANG_PRAGMA(PRAGMA) |
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| 72 | #endif |
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| 73 | |
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| 74 | /* COMPILER(MSVC) - Microsoft Visual C++ */ |
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| 75 | /* COMPILER(MSVC7_OR_LOWER) - Microsoft Visual C++ 2003 or lower*/ |
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| 76 | /* COMPILER(MSVC9_OR_LOWER) - Microsoft Visual C++ 2008 or lower*/ |
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| 77 | /* COMPILER(MSVC12_OR_LOWER) - Microsoft Visual C++ 2013 or lower*/ |
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| 78 | #if defined(_MSC_VER) |
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| 79 | #define WTF_COMPILER_MSVC 1 |
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| 80 | #if _MSC_VER < 1400 |
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| 81 | #define WTF_COMPILER_MSVC7_OR_LOWER 1 |
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| 82 | #elif _MSC_VER < 1600 |
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| 83 | #define WTF_COMPILER_MSVC9_OR_LOWER 1 |
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| 84 | #elif _MSC_VER < 1800 |
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| 85 | #define WTF_COMPILER_MSVC12_OR_LOWER 1 |
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| 86 | #endif |
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| 87 | |
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| 88 | /* Specific compiler features */ |
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| 89 | #if !COMPILER(CLANG) && _MSC_VER >= 1600 |
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| 90 | #define WTF_COMPILER_SUPPORTS_CXX_NULLPTR 1 |
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| 91 | #endif |
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| 92 | |
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| 93 | #if !COMPILER(CLANG) |
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| 94 | #define WTF_COMPILER_SUPPORTS_CXX_OVERRIDE_CONTROL 1 |
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| 95 | #define WTF_COMPILER_QUIRK_FINAL_IS_CALLED_SEALED 1 |
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| 96 | #endif |
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| 97 | |
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| 98 | #endif |
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| 99 | |
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| 100 | /* COMPILER(RVCT) - ARM RealView Compilation Tools */ |
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| 101 | #if defined(__CC_ARM) || defined(__ARMCC__) |
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| 102 | #define WTF_COMPILER_RVCT 1 |
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| 103 | #define RVCT_VERSION_AT_LEAST(major, minor, patch, build) (__ARMCC_VERSION >= (major * 100000 + minor * 10000 + patch * 1000 + build)) |
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| 104 | #else |
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| 105 | /* Define this for !RVCT compilers, just so we can write things like RVCT_VERSION_AT_LEAST(3, 0, 0, 0). */ |
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| 106 | #define RVCT_VERSION_AT_LEAST(major, minor, patch, build) 0 |
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| 107 | #endif |
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| 108 | |
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| 109 | /* COMPILER(GCCE) - GNU Compiler Collection for Embedded */ |
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| 110 | #if defined(__GCCE__) |
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| 111 | #define WTF_COMPILER_GCCE 1 |
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| 112 | #define GCCE_VERSION (__GCCE__ * 10000 + __GCCE_MINOR__ * 100 + __GCCE_PATCHLEVEL__) |
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| 113 | #define GCCE_VERSION_AT_LEAST(major, minor, patch) (GCCE_VERSION >= (major * 10000 + minor * 100 + patch)) |
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| 114 | #endif |
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| 115 | |
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| 116 | /* COMPILER(GHS) - Green Hills MULTI Compiler */ |
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| 117 | #if defined(__ghs) |
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| 118 | #define WTF_COMPILER_GHS 1 |
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| 119 | #endif |
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| 120 | |
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| 121 | /* COMPILER(GCC) - GNU Compiler Collection */ |
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| 122 | /* --gnu option of the RVCT compiler also defines __GNUC__ */ |
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| 123 | #if defined(__GNUC__) && !COMPILER(RVCT) |
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| 124 | #define WTF_COMPILER_GCC 1 |
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| 125 | #define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) |
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| 126 | #define GCC_VERSION_AT_LEAST(major, minor, patch) (GCC_VERSION >= (major * 10000 + minor * 100 + patch)) |
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| 127 | #else |
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| 128 | /* Define this for !GCC compilers, just so we can write things like GCC_VERSION_AT_LEAST(4, 1, 0). */ |
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| 129 | #define GCC_VERSION_AT_LEAST(major, minor, patch) 0 |
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| 130 | #endif |
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| 131 | |
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| 132 | /* Specific compiler features */ |
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| 133 | #if COMPILER(GCC) && !COMPILER(CLANG) |
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| 134 | #if GCC_VERSION_AT_LEAST(4, 8, 0) |
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| 135 | #pragma GCC diagnostic ignored "-Wunused-local-typedefs" |
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| 136 | #endif |
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| 137 | #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L |
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| 138 | /* C11 support */ |
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| 139 | #define WTF_COMPILER_SUPPORTS_C_STATIC_ASSERT 1 |
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| 140 | #endif |
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| 141 | #if defined(__GXX_EXPERIMENTAL_CXX0X__) || (defined(__cplusplus) && __cplusplus >= 201103L) |
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| 142 | /* C++11 support */ |
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| 143 | #if GCC_VERSION_AT_LEAST(4, 3, 0) |
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| 144 | #define WTF_COMPILER_SUPPORTS_CXX_RVALUE_REFERENCES 1 |
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| 145 | #define WTF_COMPILER_SUPPORTS_CXX_STATIC_ASSERT 1 |
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| 146 | #define WTF_COMPILER_SUPPORTS_CXX_VARIADIC_TEMPLATES 1 |
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| 147 | #endif |
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| 148 | #if GCC_VERSION_AT_LEAST(4, 4, 0) |
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| 149 | #define WTF_COMPILER_SUPPORTS_CXX_DELETED_FUNCTIONS 1 |
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| 150 | #endif |
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| 151 | #if GCC_VERSION_AT_LEAST(4, 5, 0) |
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| 152 | #define WTF_COMPILER_SUPPORTS_CXX_EXPLICIT_CONVERSIONS 1 |
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| 153 | #endif |
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| 154 | #if GCC_VERSION_AT_LEAST(4, 6, 0) |
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| 155 | #define WTF_COMPILER_SUPPORTS_CXX_NULLPTR 1 |
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| 156 | /* Strong enums should work from gcc 4.4, but doesn't seem to support some operators */ |
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| 157 | #define WTF_COMPILER_SUPPORTS_CXX_STRONG_ENUMS 1 |
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| 158 | #endif |
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| 159 | #if GCC_VERSION_AT_LEAST(4, 7, 0) |
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| 160 | #define WTF_COMPILER_SUPPORTS_CXX_OVERRIDE_CONTROL 1 |
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| 161 | #endif |
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| 162 | #endif /* defined(__GXX_EXPERIMENTAL_CXX0X__) || (defined(__cplusplus) && __cplusplus >= 201103L) */ |
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| 163 | #endif /* COMPILER(GCC) */ |
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| 164 | |
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| 165 | /* COMPILER(MINGW) - MinGW GCC */ |
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| 166 | /* COMPILER(MINGW64) - mingw-w64 GCC - only used as additional check to exclude mingw.org specific functions */ |
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| 167 | #if defined(__MINGW32__) |
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| 168 | #define WTF_COMPILER_MINGW 1 |
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| 169 | #include <_mingw.h> /* private MinGW header */ |
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| 170 | #if defined(__MINGW64_VERSION_MAJOR) /* best way to check for mingw-w64 vs mingw.org */ |
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| 171 | #define WTF_COMPILER_MINGW64 1 |
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| 172 | #endif /* __MINGW64_VERSION_MAJOR */ |
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| 173 | #endif /* __MINGW32__ */ |
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| 174 | |
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| 175 | /* COMPILER(INTEL) - Intel C++ Compiler */ |
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| 176 | #if defined(__INTEL_COMPILER) |
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| 177 | #define WTF_COMPILER_INTEL 1 |
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| 178 | #endif |
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| 179 | |
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| 180 | /* COMPILER(SUNCC) */ |
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| 181 | #if defined(__SUNPRO_CC) || defined(__SUNPRO_C) |
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| 182 | #define WTF_COMPILER_SUNCC 1 |
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| 183 | #endif |
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| 184 | |
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| 185 | /* ==== Compiler features ==== */ |
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| 186 | |
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| 187 | |
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| 188 | /* ALWAYS_INLINE */ |
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| 189 | |
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| 190 | #ifndef ALWAYS_INLINE |
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| 191 | #if COMPILER(GCC) && defined(NDEBUG) && !COMPILER(MINGW) |
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| 192 | #define ALWAYS_INLINE inline __attribute__((__always_inline__)) |
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| 193 | #elif (COMPILER(MSVC) || COMPILER(RVCT)) && defined(NDEBUG) |
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| 194 | #define ALWAYS_INLINE __forceinline |
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| 195 | #else |
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| 196 | #define ALWAYS_INLINE inline |
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| 197 | #endif |
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| 198 | #endif |
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| 199 | |
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| 200 | |
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| 201 | /* NEVER_INLINE */ |
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| 202 | |
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| 203 | #ifndef NEVER_INLINE |
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| 204 | #if COMPILER(GCC) |
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| 205 | #define NEVER_INLINE __attribute__((__noinline__)) |
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| 206 | #elif COMPILER(RVCT) |
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| 207 | #define NEVER_INLINE __declspec(noinline) |
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| 208 | #else |
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| 209 | #define NEVER_INLINE |
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| 210 | #endif |
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| 211 | #endif |
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| 212 | |
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| 213 | |
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| 214 | /* UNLIKELY */ |
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| 215 | |
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| 216 | #ifndef UNLIKELY |
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| 217 | #if COMPILER(GCC) || (COMPILER(RVCT) && defined(__GNUC__)) |
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| 218 | #define UNLIKELY(x) __builtin_expect((x), 0) |
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| 219 | #else |
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| 220 | #define UNLIKELY(x) (x) |
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| 221 | #endif |
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| 222 | #endif |
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| 223 | |
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| 224 | |
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| 225 | /* LIKELY */ |
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| 226 | |
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| 227 | #ifndef LIKELY |
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| 228 | #if COMPILER(GCC) || (COMPILER(RVCT) && defined(__GNUC__)) |
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| 229 | #define LIKELY(x) __builtin_expect((x), 1) |
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| 230 | #else |
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| 231 | #define LIKELY(x) (x) |
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| 232 | #endif |
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| 233 | #endif |
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| 234 | |
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| 235 | |
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| 236 | /* NO_RETURN */ |
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| 237 | |
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| 238 | |
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| 239 | #ifndef NO_RETURN |
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| 240 | #if COMPILER(GCC) |
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| 241 | #define NO_RETURN __attribute((__noreturn__)) |
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| 242 | #elif COMPILER(MSVC) || COMPILER(RVCT) |
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| 243 | #define NO_RETURN __declspec(noreturn) |
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| 244 | #else |
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| 245 | #define NO_RETURN |
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| 246 | #endif |
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| 247 | #endif |
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| 248 | |
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| 249 | |
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| 250 | /* NO_RETURN_WITH_VALUE */ |
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| 251 | |
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| 252 | #ifndef NO_RETURN_WITH_VALUE |
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| 253 | #if !COMPILER(MSVC) |
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| 254 | #define NO_RETURN_WITH_VALUE NO_RETURN |
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| 255 | #else |
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| 256 | #define NO_RETURN_WITH_VALUE |
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| 257 | #endif |
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| 258 | #endif |
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| 259 | |
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| 260 | |
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| 261 | /* WARN_UNUSED_RETURN */ |
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| 262 | |
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| 263 | #if COMPILER(GCC) |
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| 264 | #define WARN_UNUSED_RETURN __attribute__ ((warn_unused_result)) |
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| 265 | #else |
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| 266 | #define WARN_UNUSED_RETURN |
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| 267 | #endif |
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| 268 | |
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| 269 | /* OVERRIDE and FINAL */ |
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| 270 | |
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| 271 | #if COMPILER_SUPPORTS(CXX_OVERRIDE_CONTROL) |
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| 272 | #define OVERRIDE override |
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| 273 | |
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| 274 | #if COMPILER_QUIRK(FINAL_IS_CALLED_SEALED) |
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| 275 | #define FINAL sealed |
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| 276 | #else |
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| 277 | #define FINAL final |
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| 278 | #endif |
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| 279 | |
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| 280 | #else |
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| 281 | #define OVERRIDE |
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| 282 | #define FINAL |
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| 283 | #endif |
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| 284 | |
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| 285 | /* REFERENCED_FROM_ASM */ |
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| 286 | |
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| 287 | #ifndef REFERENCED_FROM_ASM |
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| 288 | #if COMPILER(GCC) |
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| 289 | #define REFERENCED_FROM_ASM __attribute__((used)) |
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| 290 | #else |
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| 291 | #define REFERENCED_FROM_ASM |
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| 292 | #endif |
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| 293 | #endif |
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| 294 | |
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| 295 | /* OBJC_CLASS */ |
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| 296 | |
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| 297 | #ifndef OBJC_CLASS |
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| 298 | #ifdef __OBJC__ |
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| 299 | #define OBJC_CLASS @class |
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| 300 | #else |
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| 301 | #define OBJC_CLASS class |
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| 302 | #endif |
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| 303 | #endif |
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| 304 | |
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| 305 | /* ABI */ |
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| 306 | #if defined(__ARM_EABI__) || defined(__EABI__) |
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| 307 | #define WTF_COMPILER_SUPPORTS_EABI 1 |
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| 308 | #endif |
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| 309 | |
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| 310 | #endif /* WTF_Compiler_h */ |
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| 311 | |
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