Util: Add timer class

src/util/timer.cpp

@@ -0,0 +1,72 @@
+#include <algorithm> // max, min
+#include <chrono>  // high_resolution_clock seconds, milliseconds, microseconds, nanoseconds
+#include <cstdint> // uint64_t
+
+#include "util/timer.h"
+
+namespace Util {
+
+Timer::Timer()
+{
+	m_start = std::chrono::high_resolution_clock::now();
+}
+
+Timer Timer::operator-(const Timer& timer)
+{
+	return Timer(TimePoint { m_start - timer.start() });
+}
+
+template<typename To, typename From>
+To Timer::to(From from)
+{
+	return std::chrono::duration_cast<To>(from);
+}
+
+uint64_t Timer::toSeconds()
+{
+	return to<std::chrono::seconds>(m_start.time_since_epoch()).count();
+}
+
+uint64_t Timer::toMilliseconds()
+{
+	return to<std::chrono::milliseconds>(m_start.time_since_epoch()).count();
+}
+
+uint64_t Timer::toMicroseconds()
+{
+	return to<std::chrono::microseconds>(m_start.time_since_epoch()).count();
+}
+
+uint64_t Timer::toNaneseconds()
+{
+	return to<std::chrono::nanoseconds>(m_start.time_since_epoch()).count();
+}
+
+template<typename T>
+uint64_t Timer::elapsed()
+{
+	auto now = std::chrono::high_resolution_clock::now();
+	return std::chrono::duration_cast<T>(now - m_start).count();
+}
+
+uint64_t Timer::elapsedSeconds()
+{
+	return elapsed<std::chrono::seconds>();
+}
+
+uint64_t Timer::elapsedMilliseconds()
+{
+	return elapsed<std::chrono::milliseconds>();
+}
+
+uint64_t Timer::elapsedMicroseconds()
+{
+	return elapsed<std::chrono::microseconds>();
+}
+
+uint64_t Timer::elapsedNanoseconds()
+{
+	return elapsed<std::chrono::nanoseconds>();
+}
+
+} // namespace Util

src/util/timer.h

@@ -0,0 +1,43 @@
+#ifndef TIMER_H
+#define TIMER_H
+
+#include <chrono>  // high_resolution_clock
+#include <cstdint> // uint64_t
+
+namespace Util {
+
+using TimePoint = std::chrono::high_resolution_clock::time_point;
+
+class Timer {
+public:
+	Timer();
+	Timer(const TimePoint& timePoint)
+		: m_start(timePoint)
+	{
+	}
+
+	Timer operator-(const Timer& timer);
+
+	template<typename To, typename From>
+	To to(From from);
+	uint64_t toSeconds();
+	uint64_t toMilliseconds();
+	uint64_t toMicroseconds();
+	uint64_t toNaneseconds();
+
+	template<typename T>
+	uint64_t elapsed();
+	uint64_t elapsedSeconds();
+	uint64_t elapsedMilliseconds();
+	uint64_t elapsedMicroseconds();
+	uint64_t elapsedNanoseconds();
+
+	const TimePoint& start() const { return m_start; }
+
+private:
+	TimePoint m_start;
+};
+
+} // namespace Util
+
+#endif // TIMER_H