1 /* 2 * Copyright 2018 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 #ifndef SkMacros_DEFINED 8 #define SkMacros_DEFINED 9 10 /* 11 * Usage: SK_MACRO_CONCAT(a, b) to construct the symbol ab 12 * 13 * SK_MACRO_CONCAT_IMPL_PRIV just exists to make this work. Do not use directly 14 * 15 */ 16 #define SK_MACRO_CONCAT(X, Y) SK_MACRO_CONCAT_IMPL_PRIV(X, Y) 17 #define SK_MACRO_CONCAT_IMPL_PRIV(X, Y) X ## Y 18 19 /* 20 * Usage: SK_MACRO_APPEND_LINE(foo) to make foo123, where 123 is the current 21 * line number. Easy way to construct 22 * unique names for local functions or 23 * variables. 24 */ 25 #define SK_MACRO_APPEND_LINE(name) SK_MACRO_CONCAT(name, __LINE__) 26 27 #define SK_MACRO_APPEND_COUNTER(name) SK_MACRO_CONCAT(name, __COUNTER__) 28 29 //////////////////////////////////////////////////////////////////////////////// 30 31 // Can be used to bracket data types that must be dense/packed, e.g. hash keys. 32 #if defined(__clang__) // This should work on GCC too, but GCC diagnostic pop didn't seem to work! 33 #define SK_BEGIN_REQUIRE_DENSE _Pragma("GCC diagnostic push") \ 34 _Pragma("GCC diagnostic error \"-Wpadded\"") 35 #define SK_END_REQUIRE_DENSE _Pragma("GCC diagnostic pop") 36 #else 37 #define SK_BEGIN_REQUIRE_DENSE 38 #define SK_END_REQUIRE_DENSE 39 #endif 40 41 #if defined(__clang__) && defined(__has_feature) 42 // Some compilers have a preprocessor that does not appear to do short-circuit 43 // evaluation as expected 44 #if __has_feature(leak_sanitizer) || __has_feature(address_sanitizer) 45 // Chrome had issues if we tried to include lsan_interface.h ourselves. 46 // https://github.com/llvm/llvm-project/blob/10a35632d55bb05004fe3d0c2d4432bb74897ee7/compiler-rt/include/sanitizer/lsan_interface.h#L26 47 extern "C" { 48 void __lsan_ignore_object(const void *p); 49 } 50 #define SK_INTENTIONALLY_LEAKED(X) __lsan_ignore_object(X) 51 #else 52 #define SK_INTENTIONALLY_LEAKED(X) ((void)0) 53 #endif 54 #else 55 #define SK_INTENTIONALLY_LEAKED(X) ((void)0) 56 #endif 57 58 #define SK_INIT_TO_AVOID_WARNING = 0 59 60 //////////////////////////////////////////////////////////////////////////////// 61 62 /** 63 * Defines overloaded bitwise operators to make it easier to use an enum as a 64 * bitfield. 65 */ 66 #define SK_MAKE_BITFIELD_OPS(X) \ 67 inline X operator ~(X a) { \ 68 using U = std::underlying_type_t<X>; \ 69 return (X) (~static_cast<U>(a)); \ 70 } \ 71 inline X operator |(X a, X b) { \ 72 using U = std::underlying_type_t<X>; \ 73 return (X) (static_cast<U>(a) | static_cast<U>(b)); \ 74 } \ 75 inline X& operator |=(X& a, X b) { \ 76 return (a = a | b); \ 77 } \ 78 inline X operator &(X a, X b) { \ 79 using U = std::underlying_type_t<X>; \ 80 return (X) (static_cast<U>(a) & static_cast<U>(b)); \ 81 } \ 82 inline X& operator &=(X& a, X b) { \ 83 return (a = a & b); \ 84 } 85 86 #define SK_DECL_BITFIELD_OPS_FRIENDS(X) \ 87 friend X operator ~(X a); \ 88 friend X operator |(X a, X b); \ 89 friend X& operator |=(X& a, X b); \ 90 \ 91 friend X operator &(X a, X b); \ 92 friend X& operator &=(X& a, X b); 93 94 #endif // SkMacros_DEFINED 95