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| 1 /* |
| 2 * Copyright 2013 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 |
| 8 #ifndef SkAtomics_none_DEFINED |
| 9 #define SkAtomics_none_DEFINED |
| 10 |
| 11 /** Non-atomic atomics for uniprocessor systems. */ |
| 12 |
| 13 #include "SkTypes.h" |
| 14 |
| 15 static inline int32_t sk_atomic_inc(int32_t* addr) { |
| 16 int32_t value = *addr; |
| 17 *addr = value + 1; |
| 18 return value; |
| 19 } |
| 20 |
| 21 static inline int32_t sk_atomic_add(int32_t* addr, int32_t inc) { |
| 22 int32_t value = *addr; |
| 23 *addr = value + inc; |
| 24 return value; |
| 25 } |
| 26 |
| 27 static inline int32_t sk_atomic_dec(int32_t* addr) { |
| 28 int32_t value = *addr; |
| 29 *addr = value - 1; |
| 30 return value; |
| 31 } |
| 32 |
| 33 static inline void sk_membar_acquire__after_atomic_dec() { } |
| 34 |
| 35 static inline int32_t sk_atomic_conditional_inc(int32_t* addr) { |
| 36 int32_t value = *addr; |
| 37 if (value != 0) ++*addr; |
| 38 return value; |
| 39 } |
| 40 |
| 41 static inline void sk_membar_acquire__after_atomic_conditional_inc() { } |
| 42 |
| 43 #endif |
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