| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkAtomics_none_DEFINED |
| #define SkAtomics_none_DEFINED |
| |
| /** Non-atomic atomics for uniprocessor systems. */ |
| |
| #include <stdint.h> |
| |
| static inline int32_t sk_atomic_inc(int32_t* addr) { |
| int32_t value = *addr; |
| *addr = value + 1; |
| return value; |
| } |
| |
| static inline int32_t sk_atomic_add(int32_t* addr, int32_t inc) { |
| int32_t value = *addr; |
| *addr = value + inc; |
| return value; |
| } |
| |
| static inline int32_t sk_atomic_dec(int32_t* addr) { |
| int32_t value = *addr; |
| *addr = value - 1; |
| return value; |
| } |
| |
| static inline void sk_membar_acquire__after_atomic_dec() { } |
| |
| static inline int32_t sk_atomic_conditional_inc(int32_t* addr) { |
| int32_t value = *addr; |
| if (value != 0) ++*addr; |
| return value; |
| } |
| |
| static inline bool sk_atomic_cas(int32_t* addr, int32_t before, int32_t after) { |
| if (*addr != before) return false; |
| *addr = after; |
| return true; |
| } |
| |
| static inline void sk_membar_acquire__after_atomic_conditional_inc() { } |
| |
| #endif |
