1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "atomic.h" 18 19 #include <stdatomic.h> 20 #include <stdbool.h> 21 22 int32_t android_atomic_acquire_load(volatile const int32_t* addr) { 23 volatile atomic_int_least32_t* a = (volatile atomic_int_least32_t*) addr; 24 return atomic_load_explicit(a, memory_order_acquire); 25 } 26 27 void android_atomic_release_store(int32_t value, volatile int32_t* addr) { 28 volatile atomic_int_least32_t* a = (volatile atomic_int_least32_t*) addr; 29 atomic_store_explicit(a, value, memory_order_release); 30 } 31 32 int32_t android_atomic_exchange(int32_t value, volatile const int32_t* addr) { 33 volatile atomic_int_least32_t* a = (volatile atomic_int_least32_t*) addr; 34 return atomic_exchange(a, value); 35 } 36 37 bool android_atomic_compare_exchange(int32_t* expect, int32_t desire, 38 volatile const int32_t* addr) { 39 volatile atomic_int_least32_t* a = (volatile atomic_int_least32_t*) addr; 40 return atomic_compare_exchange_weak(a, expect, desire); 41 } 42
