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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkDynamicAnnotations_DEFINED | 8 #ifndef SkDynamicAnnotations_DEFINED |
9 #define SkDynamicAnnotations_DEFINED | 9 #define SkDynamicAnnotations_DEFINED |
10 | 10 |
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59 } | 59 } |
60 | 60 |
61 #else // !DYNAMIC_ANNOTATIONS_ENABLED | 61 #else // !DYNAMIC_ANNOTATIONS_ENABLED |
62 | 62 |
63 #define SK_ANNOTATE_UNPROTECTED_READ(x) (x) | 63 #define SK_ANNOTATE_UNPROTECTED_READ(x) (x) |
64 #define SK_ANNOTATE_UNPROTECTED_WRITE(ptr, val) *(ptr) = (val) | 64 #define SK_ANNOTATE_UNPROTECTED_WRITE(ptr, val) *(ptr) = (val) |
65 #define SK_ANNOTATE_BENIGN_RACE(ptr) | 65 #define SK_ANNOTATE_BENIGN_RACE(ptr) |
66 | 66 |
67 #endif | 67 #endif |
68 | 68 |
69 // Can be used to wrap values that are intentionally racy, usually small mutable
cached values, e.g. | |
70 // - SkMatrix type mask | |
71 // - SkPixelRef genIDs | |
72 template <typename T> | |
73 class SkTRacy { | |
74 public: | |
75 operator const T() const { | |
76 return SK_ANNOTATE_UNPROTECTED_READ(fVal); | |
77 } | |
78 | |
79 SkTRacy& operator=(const T& val) { | |
80 SK_ANNOTATE_UNPROTECTED_WRITE(&fVal, val); | |
81 return *this; | |
82 } | |
83 | |
84 private: | |
85 T fVal; | |
86 }; | |
87 | |
88 #endif//SkDynamicAnnotations_DEFINED | 69 #endif//SkDynamicAnnotations_DEFINED |
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