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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