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#ifndef THREAD_MUTEX_H
18#define THREAD_MUTEX_H
19
20#include "apr_pools.h"
21
22typedef enum thread_mutex_type {
23    thread_mutex_critical_section,
24    thread_mutex_unnested_event,
25    thread_mutex_nested_mutex
26} thread_mutex_type;
27
28/* handle applies only to unnested_event on all platforms
29 * and nested_mutex on Win9x only.  Otherwise critical_section
30 * is used for NT nexted mutexes providing optimal performance.
31 */
32struct apr_thread_mutex_t {
33    apr_pool_t       *pool;
34    thread_mutex_type type;
35    HANDLE            handle;
36    CRITICAL_SECTION  section;
37};
38
39#endif  /* THREAD_MUTEX_H */
40
41