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.h"
18#include "apr_atomic.h"
19
20#include <stdlib.h>
21
22APR_DECLARE(apr_status_t) apr_atomic_init(apr_pool_t *pool)
23{
24    return APR_SUCCESS;
25}
26
27APR_DECLARE(apr_uint32_t) apr_atomic_add32(volatile apr_uint32_t *mem, apr_uint32_t val)
28{
29    return atomic_xchgadd((unsigned long *)mem,(unsigned long)val);
30}
31
32APR_DECLARE(void) apr_atomic_sub32(volatile apr_uint32_t *mem, apr_uint32_t val)
33{
34    atomic_sub((unsigned long *)mem,(unsigned long)val);
35}
36
37APR_DECLARE(apr_uint32_t) apr_atomic_inc32(volatile apr_uint32_t *mem)
38{
39    return atomic_xchgadd((unsigned long *)mem, 1);
40}
41
42APR_DECLARE(void) apr_atomic_set32(volatile apr_uint32_t *mem, apr_uint32_t val)
43{
44    *mem = val;
45}
46
47APR_DECLARE(apr_uint32_t) apr_atomic_read32(volatile apr_uint32_t *mem)
48{
49    return *mem;
50}
51
52APR_DECLARE(apr_uint32_t) apr_atomic_cas32(volatile apr_uint32_t *mem, apr_uint32_t with,apr_uint32_t cmp)
53{
54    return atomic_cmpxchg((unsigned long *)mem,(unsigned long)cmp,(unsigned long)with);
55}
56
57APR_DECLARE(apr_uint32_t) apr_atomic_xchg32(volatile apr_uint32_t *mem, apr_uint32_t val)
58{
59    return atomic_xchg((unsigned long *)mem,(unsigned long)val);
60}
61
62APR_DECLARE(int) apr_atomic_dec32(volatile apr_uint32_t *mem)
63{
64    return (atomic_xchgadd((unsigned long *)mem, 0xFFFFFFFF) - 1);
65}
66
67APR_DECLARE(void *) apr_atomic_casptr(volatile void **mem, void *with, const void *cmp)
68{
69    return (void*)atomic_cmpxchg((unsigned long *)mem,(unsigned long)cmp,(unsigned long)with);
70}
71
72APR_DECLARE(void*) apr_atomic_xchgptr(volatile void **mem, void *with)
73{
74    return (void*)atomic_xchg((unsigned long *)mem,(unsigned long)with);
75}
76