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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_BASE_MACROS_H_ | 5 #ifndef V8_BASE_MACROS_H_ |
6 #define V8_BASE_MACROS_H_ | 6 #define V8_BASE_MACROS_H_ |
7 | 7 |
8 #include "../../include/v8stdint.h" | 8 #include "../../include/v8stdint.h" |
9 | 9 |
10 | 10 |
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68 #define DISABLE_ASAN | 68 #define DISABLE_ASAN |
69 #endif | 69 #endif |
70 | 70 |
71 | 71 |
72 #if V8_CC_GNU | 72 #if V8_CC_GNU |
73 #define V8_IMMEDIATE_CRASH() __builtin_trap() | 73 #define V8_IMMEDIATE_CRASH() __builtin_trap() |
74 #else | 74 #else |
75 #define V8_IMMEDIATE_CRASH() ((void(*)())0)() | 75 #define V8_IMMEDIATE_CRASH() ((void(*)())0)() |
76 #endif | 76 #endif |
77 | 77 |
| 78 |
| 79 // Use C++11 static_assert if possible, which gives error |
| 80 // messages that are easier to understand on first sight. |
| 81 #if V8_HAS_CXX11_STATIC_ASSERT |
| 82 #define STATIC_ASSERT(test) static_assert(test, #test) |
| 83 #else |
| 84 // This is inspired by the static assertion facility in boost. This |
| 85 // is pretty magical. If it causes you trouble on a platform you may |
| 86 // find a fix in the boost code. |
| 87 template <bool> class StaticAssertion; |
| 88 template <> class StaticAssertion<true> { }; |
| 89 // This macro joins two tokens. If one of the tokens is a macro the |
| 90 // helper call causes it to be resolved before joining. |
| 91 #define SEMI_STATIC_JOIN(a, b) SEMI_STATIC_JOIN_HELPER(a, b) |
| 92 #define SEMI_STATIC_JOIN_HELPER(a, b) a##b |
| 93 // Causes an error during compilation of the condition is not |
| 94 // statically known to be true. It is formulated as a typedef so that |
| 95 // it can be used wherever a typedef can be used. Beware that this |
| 96 // actually causes each use to introduce a new defined type with a |
| 97 // name depending on the source line. |
| 98 template <int> class StaticAssertionHelper { }; |
| 99 #define STATIC_ASSERT(test) \ |
| 100 typedef \ |
| 101 StaticAssertionHelper<sizeof(StaticAssertion<static_cast<bool>((test))>)> \ |
| 102 SEMI_STATIC_JOIN(__StaticAssertTypedef__, __LINE__) V8_UNUSED |
| 103 |
| 104 #endif |
| 105 |
| 106 |
| 107 // The USE(x) template is used to silence C++ compiler warnings |
| 108 // issued for (yet) unused variables (typically parameters). |
| 109 template <typename T> |
| 110 inline void USE(T) { } |
| 111 |
78 #endif // V8_BASE_MACROS_H_ | 112 #endif // V8_BASE_MACROS_H_ |
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