mirror of https://github.com/Icinga/icinga2.git
46 lines
874 B
C++
46 lines
874 B
C++
/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
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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 <vector>
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#include <mutex>
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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 std::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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