apr_arch_thread_mutex.h

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/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef THREAD_MUTEX_H
#define THREAD_MUTEX_H

#include "apr_pools.h"

typedef enum thread_mutex_type {
    thread_mutex_critical_section,
    thread_mutex_unnested_event,
    thread_mutex_nested_mutex
} thread_mutex_type;

/* handle applies only to unnested_event on all platforms 
 * and nested_mutex on Win9x only.  Otherwise critical_section 
 * is used for NT nexted mutexes providing optimal performance.
 */
struct apr_thread_mutex_t {
    apr_pool_t       *pool;
    thread_mutex_type type;
    HANDLE            handle;
    CRITICAL_SECTION  section;
};

#endif  /* THREAD_MUTEX_H */