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_sync_DEFINED 9#define SkAtomics_sync_DEFINED 10 11/** GCC/Clang __sync based atomics. */ 12 13#include <stdint.h> 14 15static inline __attribute__((always_inline)) int32_t sk_atomic_inc(int32_t* addr) { 16 return __sync_fetch_and_add(addr, 1); 17} 18 19static inline __attribute__((always_inline)) int32_t sk_atomic_add(int32_t* addr, int32_t inc) { 20 return __sync_fetch_and_add(addr, inc); 21} 22 23static inline __attribute__((always_inline)) int32_t sk_atomic_dec(int32_t* addr) { 24 return __sync_fetch_and_add(addr, -1); 25} 26 27static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_dec() { } 28 29static inline __attribute__((always_inline)) bool sk_atomic_cas(int32_t* addr, 30 int32_t before, 31 int32_t after) { 32 return __sync_bool_compare_and_swap(addr, before, after); 33} 34 35static inline __attribute__((always_inline)) void* sk_atomic_cas(void** addr, 36 void* before, 37 void* after) { 38 return __sync_val_compare_and_swap(addr, before, after); 39} 40 41static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_conditional_inc() { } 42 43#endif 44