Book Image

C++20 STL Cookbook

By : Bill Weinman
Book Image

C++20 STL Cookbook

By: Bill Weinman

Overview of this book

Fast, efficient, and flexible, the C++ programming language has come a long way and is used in every area of the industry to solve many problems. The latest version C++20 will see programmers change the way they code as it brings a whole array of features enabling the quick deployment of applications. This book will get you up and running with using the STL in the best way possible. Beginning with new language features in C++20, this book will help you understand the language's mechanics and library features and offer insights into how they work. Unlike other books, the C++20 STL Cookbook takes an implementation-specific, problem-solution approach that will help you overcome hurdles quickly. You'll learn core STL concepts, such as containers, algorithms, utility classes, lambda expressions, iterators, and more, while working on real-world recipes. This book is a reference guide for using the C++ STL with its latest capabilities and exploring the cutting-edge features in functional programming and lambda expressions. By the end of the book C++20 book, you'll be able to leverage the latest C++ features and save time and effort while solving tasks elegantly using the STL.
Table of Contents (13 chapters)

Sleep for a specific amount of time

The <thread> header provides two functions for putting a thread to sleep, sleep_for() and sleep_until(). Both functions are in the std::this_thread namespace.

This recipe explores the use of these functions, as we will be using them later in this chapter.

How to do it…

Let's look at how to use the sleep_for() and sleep_until() functions:

  • The sleep-related functions are in the std::this_thread namespace. Because it has just a few symbols, we'll go ahead and issue using directives for std::this_thread and std::chrono_literals:
    using namespace std::this_thread;
    using namespace std::chrono_literals;

The chrono_literals namespace has symbols for representing durations, such as 1s for one second, or 100ms for 100 milliseconds.

  • In main(), we'll mark a point in time with steady_clock::now(), so we can time our test:
    int main() {
        auto t1 = steady_clock::now();