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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #include "apr_arch_atomic.h"
19 #ifdef USE_ATOMICS_BUILTINS
21 APR_DECLARE(apr_status_t) apr_atomic_init(apr_pool_t *p)
26 APR_DECLARE(apr_uint32_t) apr_atomic_read32(volatile apr_uint32_t *mem)
31 APR_DECLARE(void) apr_atomic_set32(volatile apr_uint32_t *mem, apr_uint32_t val)
36 APR_DECLARE(apr_uint32_t) apr_atomic_add32(volatile apr_uint32_t *mem, apr_uint32_t val)
38 return __sync_fetch_and_add(mem, val);
41 APR_DECLARE(void) apr_atomic_sub32(volatile apr_uint32_t *mem, apr_uint32_t val)
43 __sync_fetch_and_sub(mem, val);
46 APR_DECLARE(apr_uint32_t) apr_atomic_inc32(volatile apr_uint32_t *mem)
48 return __sync_fetch_and_add(mem, 1);
51 APR_DECLARE(int) apr_atomic_dec32(volatile apr_uint32_t *mem)
53 return __sync_sub_and_fetch(mem, 1);
56 APR_DECLARE(apr_uint32_t) apr_atomic_cas32(volatile apr_uint32_t *mem, apr_uint32_t with,
59 return __sync_val_compare_and_swap(mem, cmp, with);
62 APR_DECLARE(apr_uint32_t) apr_atomic_xchg32(volatile apr_uint32_t *mem, apr_uint32_t val)
66 return __sync_lock_test_and_set(mem, val);
69 APR_DECLARE(void*) apr_atomic_casptr(volatile void **mem, void *with, const void *cmp)
71 return (void*) __sync_val_compare_and_swap(mem, cmp, with);
74 APR_DECLARE(void*) apr_atomic_xchgptr(volatile void **mem, void *with)
78 return (void*) __sync_lock_test_and_set(mem, with);
81 #endif /* USE_ATOMICS_BUILTINS */