| /* |
| * 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_android_DEFINED |
| #define SkAtomics_android_DEFINED |
| |
| /** Android framework atomics. */ |
| |
| #include <cutils/atomic.h> |
| #include <stdint.h> |
| |
| #define sk_atomic_inc(addr) android_atomic_inc(addr) |
| #define sk_atomic_add(addr, inc) android_atomic_add(inc, addr) |
| #define sk_atomic_dec(addr) android_atomic_dec(addr) |
| |
| static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_dec() { |
| //HACK: Android is actually using full memory barriers. |
| // Should this change, uncomment below. |
| //int dummy; |
| //android_atomic_acquire_store(0, &dummy); |
| } |
| |
| static inline __attribute__((always_inline)) int32_t sk_atomic_conditional_inc(int32_t* addr) { |
| while (true) { |
| int32_t value = *addr; |
| if (value == 0) { |
| return 0; |
| } |
| if (0 == android_atomic_release_cas(value, value + 1, addr)) { |
| return value; |
| } |
| } |
| } |
| |
| static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_conditional_inc() { |
| //HACK: Android is actually using full memory barriers. |
| // Should this change, uncomment below. |
| //int dummy; |
| //android_atomic_acquire_store(0, &dummy); |
| } |
| |
| #endif |