Book Image

Hands-On System Programming with C++

By : Dr. Rian Quinn
Book Image

Hands-On System Programming with C++

By: Dr. Rian Quinn

Overview of this book

C++ is a general-purpose programming language with a bias toward system programming as it provides ready access to hardware-level resources, efficient compilation, and a versatile approach to higher-level abstractions. This book will help you understand the benefits of system programming with C++17. You will gain a firm understanding of various C, C++, and POSIX standards, as well as their respective system types for both C++ and POSIX. After a brief refresher on C++, Resource Acquisition Is Initialization (RAII), and the new C++ Guideline Support Library (GSL), you will learn to program Linux and Unix systems along with process management. As you progress through the chapters, you will become acquainted with C++'s support for IO. You will then study various memory management methods, including a chapter on allocators and how they benefit system programming. You will also explore how to program file input and output and learn about POSIX sockets. This book will help you get to grips with safely setting up a UDP and TCP server/client. Finally, you will be guided through Unix time interfaces, multithreading, and error handling with C++ exceptions. By the end of this book, you will be comfortable with using C++ to program high-quality systems.
Table of Contents (16 chapters)

The Guideline Support Library (GSL)

As stated before, the goal of the C++ Core Guidelines is to provide a set of best practices associated with programming C++. The GSL is a library designed to assist in maintaining compliance with these guidelines. In general, there are some overall themes associated with the GSL:

  • Pointer ownership: Defining who owns a pointer is a simple way to prevent memory leaks and pointer corruption. In general, the best way to define ownership is through the use of std::unique_ptr{} and std::shared_ptr{}, which will be explained in depth in Chapter 7, A Comprehensive Look at Memory Management, but in some cases, these cannot be used and the GSL helps to deal with these edge cases.
  • Expectation management: The GSL also helps to define what a function should expect for input and what it ensures for output, with the goal being to transition these concepts...