1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements.  See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License.  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 "apr_arch_atomic.h"
18
19#ifdef USE_ATOMICS_BUILTINS
20
21APR_DECLARE(apr_uint64_t) apr_atomic_read64(volatile apr_uint64_t *mem)
22{
23    return *mem;
24}
25
26APR_DECLARE(void) apr_atomic_set64(volatile apr_uint64_t *mem, apr_uint64_t val)
27{
28    *mem = val;
29}
30
31APR_DECLARE(apr_uint64_t) apr_atomic_add64(volatile apr_uint64_t *mem, apr_uint64_t val)
32{
33    return __sync_fetch_and_add(mem, val);
34}
35
36APR_DECLARE(void) apr_atomic_sub64(volatile apr_uint64_t *mem, apr_uint64_t val)
37{
38    __sync_fetch_and_sub(mem, val);
39}
40
41APR_DECLARE(apr_uint64_t) apr_atomic_inc64(volatile apr_uint64_t *mem)
42{
43    return __sync_fetch_and_add(mem, 1);
44}
45
46APR_DECLARE(int) apr_atomic_dec64(volatile apr_uint64_t *mem)
47{
48    return __sync_sub_and_fetch(mem, 1);
49}
50
51APR_DECLARE(apr_uint64_t) apr_atomic_cas64(volatile apr_uint64_t *mem, apr_uint64_t with,
52                                           apr_uint64_t cmp)
53{
54    return __sync_val_compare_and_swap(mem, cmp, with);
55}
56
57APR_DECLARE(apr_uint64_t) apr_atomic_xchg64(volatile apr_uint64_t *mem, apr_uint64_t val)
58{
59    __sync_synchronize();
60
61    return __sync_lock_test_and_set(mem, val);
62}
63
64#endif /* USE_ATOMICS_BUILTINS */
65