cyclicbuffer.h

/*
 * 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_CYCLICBUFFER_H
#define _LOG4CXX_HELPERS_CYCLICBUFFER_H

#include <log4cxx/spi/loggingevent.h>

namespace log4cxx
{
namespace helpers
{
class LOG4CXX_EXPORT CyclicBuffer
{
        log4cxx::spi::LoggingEventList ea;
        int first;
        int last;
        int numElems;
        int maxSize;

    public:
        CyclicBuffer(int maxSize);
        ~CyclicBuffer();

        void add(const spi::LoggingEventPtr& event);

        spi::LoggingEventPtr get(int i);

        int getMaxSize() const
        {
            return maxSize;
        }

        spi::LoggingEventPtr get();

        int length() const
        {
            return numElems;
        }

        void resize(int newSize);
}; // class CyclicBuffer
}  //namespace helpers
} //namespace log4cxx

#endif //_LOG4CXX_HELPERS_CYCLICBUFFER_H