mirror of https://github.com/Icinga/icinga2.git
63 lines
2.2 KiB
C++
63 lines
2.2 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2018 Icinga Development Team (https://www.icinga.com/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#ifndef RINGBUFFER_H
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#define RINGBUFFER_H
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#include "base/i2-base.hpp"
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#include "base/object.hpp"
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#include <boost/thread/mutex.hpp>
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#include <vector>
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namespace icinga
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{
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/**
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* A ring buffer that holds a pre-defined number of integers.
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*
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* @ingroup base
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*/
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class RingBuffer final
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{
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public:
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DECLARE_PTR_TYPEDEFS(RingBuffer);
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typedef std::vector<int>::size_type SizeType;
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RingBuffer(SizeType slots);
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SizeType GetLength() const;
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void InsertValue(SizeType tv, int num);
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int UpdateAndGetValues(SizeType tv, SizeType span);
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double CalculateRate(SizeType tv, SizeType span);
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private:
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mutable boost::mutex m_Mutex;
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std::vector<int> m_Slots;
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SizeType m_TimeValue;
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SizeType m_InsertedValues;
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void InsertValueUnlocked(SizeType tv, int num);
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int UpdateAndGetValuesUnlocked(SizeType tv, SizeType span);
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};
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}
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#endif /* RINGBUFFER_H */
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