1/***********************************************************************
2 * Software License Agreement (BSD License)
3 *
4 * Copyright 2008-2009  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
5 * Copyright 2008-2009  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
6 *
7 * THE BSD LICENSE
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30
31#ifndef OPENCV_FLANN_TIMER_H
32#define OPENCV_FLANN_TIMER_H
33
34#include <time.h>
35#include "opencv2/core.hpp"
36#include "opencv2/core/utility.hpp"
37
38namespace cvflann
39{
40
41/**
42 * A start-stop timer class.
43 *
44 * Can be used to time portions of code.
45 */
46class StartStopTimer
47{
48    int64 startTime;
49
50public:
51    /**
52     * Value of the timer.
53     */
54    double value;
55
56
57    /**
58     * Constructor.
59     */
60    StartStopTimer()
61    {
62        reset();
63    }
64
65    /**
66     * Starts the timer.
67     */
68    void start()
69    {
70        startTime = cv::getTickCount();
71    }
72
73    /**
74     * Stops the timer and updates timer value.
75     */
76    void stop()
77    {
78        int64 stopTime = cv::getTickCount();
79        value += ( (double)stopTime - startTime) / cv::getTickFrequency();
80    }
81
82    /**
83     * Resets the timer value to 0.
84     */
85    void reset()
86    {
87        value = 0;
88    }
89
90};
91
92}
93
94#endif // FLANN_TIMER_H
95