std::chrono::gps_clock(3) C++ Standard Libary std::chrono::gps_clock(3) NAME std::chrono::gps_clock - std::chrono::gps_clock Synopsis Defined in header <chrono> class gps_clock; (since C++20) The clock std::chrono::gps_clock is a Clock that represents Global Posi- tioning System (GPS) time. It measures time since 00:00:00, 6 January 1980 UTC. Leap seconds are not inserted into GPS. Thus, every time a leap second is inserted into UTC, UTC falls another second behind GPS. As of December 2017, UTC is 18 seconds behind GPS, reflecting the 18 leap seconds inserted between 1980 and 2017. Thus, 2018-01-01 00:00:00 UTC is equivalent to 2018-01-01 00:00:18 GPS. GPS is a constant 19 seconds behind TAI. gps_clock meets the Clock requirements. It does not meet the Trivial- Clock requirements unless the implementation can guarantee that now() does not throw an exception. Member types Member type Definition rep signed arithmetic type representing the number of ticks in the clock's duration period a std::ratio type representing the tick period of the clock, in seconds duration std::chrono::duration<rep, period>, capable of representing negative durations time_point std::chrono::time_point<std::chrono::gps_clock> Member constants true if the time between ticks is always con- stant, i.e. constexpr bool is_steady calls to now() return values that increase mo- notonically [static] even in case of some external clock adjustment, otherwise false (public static member constant) Member functions now returns a std::chrono::time_point representing the current point in time [static] (public static member function) to_utc converts a gps_time to utc_time [static] (public static member function) from_utc converts a utc_time to gps_time [static] (public static member function) http://cppreference.com 2024.06.10 std::chrono::gps_clock(3)
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