Program Listing for File SteadyClockTimer.h

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#ifndef INCLUDE_FLAMEGPU_DETAIL_STEADYCLOCKTIMER_H_
#define INCLUDE_FLAMEGPU_DETAIL_STEADYCLOCKTIMER_H_

#include <chrono>

#include "flamegpu/detail/Timer.h"
#include "flamegpu/exception/FLAMEGPUException.h"


namespace flamegpu {
namespace detail {

class SteadyClockTimer : public virtual Timer {
 public:
    SteadyClockTimer() :
        startTime(),
        stopTime(),
        startEventRecorded(false),
        stopEventRecorded(false) { }

    ~SteadyClockTimer() { }

    void start() override {
        this->startTime = std::chrono::steady_clock::now();
        this->startEventRecorded = true;
        this->stopEventRecorded = false;
    }

    void stop() override {
        this->stopTime = std::chrono::steady_clock::now();
        this->stopEventRecorded = true;
    }

    float getElapsedMilliseconds() override {
        if (!startEventRecorded) {
            THROW exception::TimerException("start() must be called prior to getElapsed*");
        }
        if (!stopEventRecorded) {
            THROW exception::TimerException("stop() must be called prior to getElapsed*");
        }
        std::chrono::duration<double> elapsed = this->stopTime - this->startTime;
        float ms = static_cast<float>(std::chrono::duration_cast<std::chrono::milliseconds>(elapsed).count());
        return ms;
    }

    float getElapsedSeconds() override {
        return this->getElapsedMilliseconds() / 1000.0f;
    }

 private:
    std::chrono::time_point<std::chrono::steady_clock> startTime;
    std::chrono::time_point<std::chrono::steady_clock> stopTime;
    bool startEventRecorded;
    bool stopEventRecorded;
};

}  // namespace detail
}  // namespace flamegpu

#endif  // INCLUDE_FLAMEGPU_DETAIL_STEADYCLOCKTIMER_H_