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)

Learning standard integer types

To address the uncertainty of the default types provided by C and C++, both provide the standard integer types, which are accessible from the stdint.h header file. This header defines the following types:

  • int8_t, uint8_t
  • int16_t, uint16_t
  • int32_t, uint32_t
  • int64_t, uint64_t

In addition, stdint.h provides both least and fast versions of the aforementioned types, and a max type and integer pointer type, which is all out-of-scope for this book. The previous types do exactly what you would expect; they define the width of integer types with a specific number of bits. For example, an int8_t is a signed 8 bit integer. No matter what the CPU architecture, operating system, or mode is, these types are always the same (with the only thing not being defined is their endianness, which is usually only needed when working with networking and external devices...