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// Copyright (c) 2020 Robert Vaser
#ifndef BIOSOUP_TIMER_HPP_
#define BIOSOUP_TIMER_HPP_
#include <chrono> // NOLINT
#include <cstdint>
namespace biosoup {
class Timer {
public:
Timer()
: checkpoint_(), elapsed_time_(0) {}
Timer(const Timer&) = default;
Timer& operator=(const Timer&) = default;
Timer(Timer&&) = default;
Timer& operator=(Timer&&) = default;
~Timer() = default;
double elapsed_time(void) const {
return elapsed_time_;
}
void Start() {
checkpoint_ = std::chrono::steady_clock::now();
}
double Stop() {
if (checkpoint_.time_since_epoch().count()) { // Start() was called
auto duration = std::chrono::duration_cast<std::chrono::duration<double>>(
std::chrono::steady_clock::now() - checkpoint_).count();
checkpoint_ = {};
elapsed_time_ += duration;
return duration;
}
return 0;
}
double Lap() const {
if (checkpoint_.time_since_epoch().count()) { // Start() was called
return std::chrono::duration_cast<std::chrono::duration<double>>(
std::chrono::steady_clock::now() - checkpoint_).count();
}
return 0;
}
void Reset() {
checkpoint_ = {};
elapsed_time_ = 0;
}
private:
std::chrono::time_point<std::chrono::steady_clock> checkpoint_;
double elapsed_time_;
};
} // namespace biosoup
#endif // BIOSOUP_TIMER_HPP_
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