timestamp.hpp

#ifndef TIMESTAMP_HPP
#define TIMESTAMP_HPP
 
#include <cstdint>
#include <compare>
 
namespace lob {
 
/** @brief Nanoseconds since the Unix epoch; zero is reserved as invalid. */
class Timestamp {
    private:
        std::uint64_t timestamp;
 
    public:
        /** Constructs an invalid, zero-valued timestamp. */
        Timestamp(): timestamp(0){}
 
        /** Constructs a timestamp from nanoseconds since the Unix epoch. */
        explicit Timestamp(std::uint64_t timestamp): timestamp(timestamp){}
 
        /** Returns nanoseconds since the Unix epoch. */
        std::uint64_t getTimestamp() const { return timestamp; }
 
        /** Returns whether the timestamp is nonzero. */
        bool isValid() const {
            return timestamp != 0;
        }
 
        /** Compares timestamps chronologically. */
        auto operator<=>(const Timestamp &other) const = default;
};
 
} // namespace lob
 
#endif // TIMESTAMP_HPP