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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 _LOG4CXX_HELPERS_APRINITIALIZER_H
#define _LOG4CXX_HELPERS_APRINITIALIZER_H

#ifndef LOG4CXX
#error "aprinitializer.h should only be included by log4cxx implementation"
#endif

#include <vector>

extern "C" {
typedef struct apr_thread_mutex_t apr_thread_mutex_t;
typedef struct apr_threadkey_t apr_threadkey_t;
}

#include <apr_time.h>

namespace log4cxx
{
  namespace helpers
  {
    class FileWatchdog;
    
    class APRInitializer
    {
    public:
    static apr_time_t initialize();
    static apr_pool_t* getRootPool();
    static apr_threadkey_t* getTlsKey();
    static bool isDestructed;
    
    /**
     *  Register a FileWatchdog for deletion prior to
     *    APR termination.  FileWatchdog must be 
     *    allocated on heap and not deleted elsewhere.
     */
    static void registerCleanup(FileWatchdog* watchdog);

    private:
      APRInitializer();
      APRInitializer(const APRInitializer&);
      APRInitializer& operator=(const APRInitializer&);
      apr_pool_t* p;
      apr_thread_mutex_t* mutex;
      std::vector<FileWatchdog*> watchdogs; 
      apr_time_t startTime;
      apr_threadkey_t* tlsKey;
      static APRInitializer& getInstance();

    public:
      ~APRInitializer();
    };
  } // namespace helpers
} // namespace log4cxx

#endif //_LOG4CXX_HELPERS_APRINITIALIZER_H