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)

Understanding POSIX threads

A thread is similar to a process, with the main distinctions being the following:

  • Threads are contained within processes
  • Threads inherently share a memory space with other threads of the same process, while processes do not share resources unless explicitly told to (using inter-process communication mechanisms)

Like processes, however, threads are scheduled for execution at any time by the operating system. This may mean executing in parallel with other threads, leading to performance optimizations if properly used, but at the expense of introducing threading-specific logic bugs, such as race conditions and deadlock.

The goal of this section is to briefly review POSIX threads. These largely influenced the design of C++ threads, which will be discussed later.