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.
21 #include "apr_private.h"
22 #include "apr_atomic.h"
23 #include "apr_thread_mutex.h"
25 #if defined(USE_ATOMICS_GENERIC)
27 #elif defined(__GNUC__) && defined(__STRICT_ANSI__)
28 /* force use of generic atomics if building e.g. with -std=c89, which
29 * doesn't allow inline asm */
30 # define USE_ATOMICS_GENERIC
31 #elif HAVE_ATOMIC_BUILTINS
32 # define USE_ATOMICS_BUILTINS
33 #elif defined(SOLARIS2) && SOLARIS2 >= 10
34 # define USE_ATOMICS_SOLARIS
35 #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
36 # define USE_ATOMICS_IA32
37 #elif defined(__GNUC__) && (defined(__PPC__) || defined(__ppc__))
38 # define USE_ATOMICS_PPC
39 #elif defined(__GNUC__) && (defined(__s390__) || defined(__s390x__))
40 # define USE_ATOMICS_S390
42 # define USE_ATOMICS_GENERIC