debugtimer.h

#ifndef DEBUGTIMER_H

#define DEBUGTIMER_H

#include <stdint.h>
#include <string>
#include <map>
#include <chrono>

class DebugTimer;

// Helper class to have a destructor to write timer info
class DebugTimerMap
{
public:
        DebugTimerMap();
        ~DebugTimerMap();

        std::map<std::string, DebugTimer *> m_timers;
};

class DebugTimer
{
public:
        ~DebugTimer();

        void start();
        void stop();

        std::chrono::high_resolution_clock::duration getDuration() const                                                        { return m_totalDuration; }
        int64_t getIterations() const                                                                                                                           { return m_count; }

        static DebugTimer *getTimer(const std::string &name);
private:
        static DebugTimerMap m_timerMap;

        DebugTimer();

        uint64_t m_count;
        std::chrono::high_resolution_clock::duration m_totalDuration;
        std::chrono::time_point<std::chrono::high_resolution_clock> m_startTime;
};

inline DebugTimer::DebugTimer() : m_count(0), m_totalDuration(0)
{
}

inline DebugTimer::~DebugTimer()
{
}

inline void DebugTimer::start()
{
        m_startTime = std::chrono::high_resolution_clock::now();
}

inline void DebugTimer::stop()
{
        auto endTime = std::chrono::high_resolution_clock::now();
        m_totalDuration += endTime-m_startTime;
        m_count++;
}

inline DebugTimer *DebugTimer::getTimer(const std::string &name)
{
        auto it = m_timerMap.m_timers.find(name);
        DebugTimer *pTimer = 0;

        if (it == m_timerMap.m_timers.end())
        {
                pTimer = new DebugTimer();
                m_timerMap.m_timers[name] = pTimer;
        }
        else
                pTimer = it->second;

        return pTimer;
}

#endif // DEBUGTIMER_H