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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 SkAtomics_none_DEFINED | 8 #ifndef SkAtomics_none_DEFINED |
9 #define SkAtomics_none_DEFINED | 9 #define SkAtomics_none_DEFINED |
10 | 10 |
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31 } | 31 } |
32 | 32 |
33 static inline void sk_membar_acquire__after_atomic_dec() { } | 33 static inline void sk_membar_acquire__after_atomic_dec() { } |
34 | 34 |
35 static inline int32_t sk_atomic_conditional_inc(int32_t* addr) { | 35 static inline int32_t sk_atomic_conditional_inc(int32_t* addr) { |
36 int32_t value = *addr; | 36 int32_t value = *addr; |
37 if (value != 0) ++*addr; | 37 if (value != 0) ++*addr; |
38 return value; | 38 return value; |
39 } | 39 } |
40 | 40 |
| 41 static inline bool sk_atomic_cas(int32_t* addr, int32_t before, int32_t after) { |
| 42 if (*addr != before) return false; |
| 43 *addr = after; |
| 44 return true; |
| 45 } |
| 46 |
41 static inline void sk_membar_acquire__after_atomic_conditional_inc() { } | 47 static inline void sk_membar_acquire__after_atomic_conditional_inc() { } |
42 | 48 |
43 #endif | 49 #endif |
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