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diff --git a/include/arch/beos/apr_arch_thread_rwlock.h b/include/arch/beos/apr_arch_thread_rwlock.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_RWLOCK_H
+#define THREAD_RWLOCK_H
+
+#include <kernel/OS.h>
+#include "apr_pools.h"
+#include "apr_thread_rwlock.h"
+#include "apr_file_io.h"
+#include "apr_general.h"
+#include "apr_lib.h"
+#include "apr_portable.h"
+
+struct apr_thread_rwlock_t {
+ apr_pool_t *pool;
+
+ /* Our lock :) */
+ sem_id Lock;
+ int32 LockCount;
+ /* Read/Write lock stuff */
+ sem_id Read;
+ int32 ReadCount;
+ sem_id Write;
+ int32 WriteCount;
+ int32 Nested;
+
+ thread_id writer;
+};
+
+#endif /* THREAD_RWLOCK_H */
+