Hiva::Duration类型定义

namespace Hiva {
/* Base class for Duration implementations. */
class BaseDuration {
public:
    BaseDuration();
    explicit BaseDuration(const double doubleSec);
    BaseDuration(const int32_t secVal, const int32_t nsecVal);
    virtual ~BaseDuration() = default;
    bool FromSec(const double doubleSec);
    bool FromNSec(const int64_t int64Nsec);
    double ToSec() const;
    int64_t ToNSec() const;
    bool IsZero() const;
    BaseDuration operator+(const BaseDuration &rhs) const;
    BaseDuration operator-(const BaseDuration &rhs) const;
    BaseDuration operator-() const;
    BaseDuration operator*(const double scale) const;
    BaseDuration &operator+=(const BaseDuration &rhs);
    BaseDuration &operator-=(const BaseDuration &rhs);
    BaseDuration &operator*=(const double scale);
    bool operator==(const BaseDuration &rhs) const;
    bool operator!=(const BaseDuration &rhs) const;
    bool operator>(const BaseDuration &rhs) const;
    bool operator<(const BaseDuration &rhs) const;
    bool operator>=(const BaseDuration &rhs) const;
    bool operator<=(const BaseDuration &rhs) const;
    int32_t sec;
    int32_t nsec;
};
std::ostream &operator<<(std::ostream &outStream, const BaseDuration &rhs);
}

namespace Hiva {
/* Duration representation for use with the Time class. */
class HivaDuration : public BaseDuration {
public:
    HivaDuration();
    explicit HivaDuration(const double doubleSec);
    explicit HivaDuration(const BaseRate &rateVal);
    HivaDuration(const BaseDuration &durationVal);
    HivaDuration(const int32_t secVal, const int32_t nsecVal);
    ~HivaDuration() override = default;
    bool Sleep() const;
};
}

namespace Hiva {
/* Duration representation for use with the WallTime class. */
class WallDuration : public BaseDuration {
public:
    WallDuration();
    explicit WallDuration(const double doubleSec);
    explicit WallDuration(const BaseRate &rateVal);
    WallDuration(const BaseDuration &durationVal);
    WallDuration(const int32_t secVal, const int32_t nsecVal);
    ~WallDuration() override = default;
    bool Sleep() const;
};
}