Time

This post concludes my introduction to the chrono extension in C++20. Today I present the time-zones functionality.

In my last post, "Calendar and Time Zone in C++20: Calendar Dates", I presented the new calendar-related data types. Today, I go one step further and interact with them.

A new type of the chrono extension in C++20 is a calendar date. C++20 offers various ways to create a calendar date and interact with them.

With C++20, the chrono library from C++11 receives essential additions. The most prominent ones are calendar and time-zones support. But this is by far not all. C++20 gets new clocks, powerful formatting functionality for time durations, and a time-of-day type.

My last post "C++20: The Core Language" presented the new features of the C++20 core language. Today, I continue my journey with an overview of the C++20 library.

The new time library is an important component of the threading interface. As well, as threads, locks, and condition variables understanding time. All four have in common that they can sleep, wait or block until a time point or for a duration.

A clock consists of a starting point and a time tick. C++ offers with std::chrono::system_clock, std::chrono::steady_clock, and std::chrono::high_resolution_clock three clocks.

Time duration is the difference between two time points. It will be measured in time ticks.

The starting point (epoch) and the additional time duration define the time point. It consists of two components, clock and time duration.

A blog dealing with multithreading in modern C++ but not writing about the new time library is incomplete. Primarily because I often used the time library in my posts to measure the performance of shortcode snippets. Therefore, I give in this post an overview of the components of the time library: time point, time duration, and clock. I will write additional posts about each of these three components.