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
android_atomic_acquire_load(volatile const int32_t * addr)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
android_atomic_release_store(int32_t value,volatile int32_t * addr)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
android_atomic_exchange(int32_t value,volatile const int32_t * addr)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
android_atomic_compare_exchange(int32_t * expect,int32_t desire,volatile const int32_t * addr)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