FreeBSD Manual Pages
std::chrono::tai_clock(3) C++ Standard Libary std::chrono::tai_clock(3) NAME std::chrono::tai_clock - std::chrono::tai_clock Synopsis Defined in header <chrono> class tai_clock; (since C++20) The clock std::chrono::tai_clock is a Clock that represents Interna- tional Atomic Time (TAI). It measures time since 00:00:00, 1 January 1958, and is offset 10 seconds ahead of UTC at that date (i.e., its epoch, 1958-01-01 00:00:00 TAI, is 1957-12-31 23:59:50 UTC). Leap seconds are not inserted into TAI. Thus, every time a leap sec- ond is inserted into UTC, UTC falls another second behind TAI. As of December 2017, UTC is 37 seconds behind TAI, reflecting the 10-second initial offset and the 27 leap seconds inserted between 1958 and 2017. Thus, 2018-01-01 00:00:00 UTC is equivalent to 2018-01-01 00:00:37 TAI. tai_clock meets the Clock requirements. It does not meet the Triv- ialClock 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 repre- senting negative durations time_point std::chrono::time_point<std::chrono::tai_clock> Member constants true if the time between ticks is always constant, i.e. constexpr bool is_steady calls to now() return values that increase monotonically [static] even in case of some external clock adjust- ment, 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 tai_time to utc_time [static] (public static member function) from_utc converts utc_time to tai_time [static] (public static member function) http://cppreference.com 2024.06.10 std::chrono::tai_clock(3)
NAME | Synopsis | Member types | Member constants | Member functions
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::chrono::tai_clock&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>