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/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
#ifndef RINGBUFFER_H
#define RINGBUFFER_H
#include "base/i2-base.hpp"
#include "base/object.hpp"
#include <vector>
#include <mutex>
namespace icinga
{
/**
* A ring buffer that holds a pre-defined number of integers.
*
* @ingroup base
*/
class RingBuffer final
{
public:
DECLARE_PTR_TYPEDEFS(RingBuffer);
typedef std::vector<int>::size_type SizeType;
RingBuffer(SizeType slots);
SizeType GetLength() const;
void InsertValue(SizeType tv, int num);
int UpdateAndGetValues(SizeType tv, SizeType span);
double CalculateRate(SizeType tv, SizeType span);
private:
mutable std::mutex m_Mutex;
std::vector<int> m_Slots;
SizeType m_TimeValue;
SizeType m_InsertedValues;
void InsertValueUnlocked(SizeType tv, int num);
int UpdateAndGetValuesUnlocked(SizeType tv, SizeType span);
};
}
#endif /* RINGBUFFER_H */
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