Book Image

Modern C++ Programming Cookbook - Second Edition

By : Marius Bancila
5 (1)
Book Image

Modern C++ Programming Cookbook - Second Edition

5 (1)
By: Marius Bancila

Overview of this book

C++ has come a long way to be one of the most widely used general-purpose languages that is fast, efficient, and high-performance at its core. The updated second edition of Modern C++ Programming Cookbook addresses the latest features of C++20, such as modules, concepts, coroutines, and the many additions to the standard library, including ranges and text formatting. The book is organized in the form of practical recipes covering a wide range of problems faced by modern developers. The book also delves into the details of all the core concepts in modern C++ programming, such as functions and classes, iterators and algorithms, streams and the file system, threading and concurrency, smart pointers and move semantics, and many others. It goes into the performance aspects of programming in depth, teaching developers how to write fast and lean code with the help of best practices. Furthermore, the book explores useful patterns and delves into the implementation of many idioms, including pimpl, named parameter, and attorney-client, teaching techniques such as avoiding repetition with the factory pattern. There is also a chapter dedicated to unit testing, where you are introduced to three of the most widely used libraries for C++: Boost.Test, Google Test, and Catch2. By the end of the book, you will be able to effectively leverage the features and techniques of C++11/14/17/20 programming to enhance the performance, scalability, and efficiency of your applications.
Table of Contents (16 chapters)
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Using shared_ptr to share a memory resource

Managing dynamically allocated objects or arrays with std::unique_ptr is not possible when the object or array has to be shared. This is because an std::unique_ptr retains its sole ownership. The C++ standard provides another smart pointer, called std::shared_ptr; it is similar to std::unique_ptr in many ways, but the difference is that it can share the ownership of an object or array with other std::shared_ptr. In this recipe, we will see how std::shared_ptr works and how it differs from std::uniqueu_ptr. We will also look at std::weak_ptr, which is a non-resource-owning smart pointer that holds a reference to an object managed by an std::shared_ptr.

Getting ready

Make sure you read the previous recipe, Using unique_ptr to uniquely own a memory resource, to become familiar with how unique_ptr and make_unique() work. We will use the foo, foo_deleter, Base, and Derived classes defined in this recipe, and also make several references...