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 about POSIX time.h APIs

We will begin this chapter by discussing POSIX time.h APIs, which provide APIs for reading various clocks and performing calculations on these clock times. Although these APIs are specific to standard C, as will be demonstrated in the following section, the C time interfaces are still needed when working with C++, a problem that is being addressed in C++20.

Learning about the types of APIs

The UNIX epoch defines the number of seconds from January 1, 1970. Interfaces described in this chapter leverage the UNIX epoch to define the notion of time. The POSIX time.h APIs, for the purpose of this chapter, define three different, opaque types:

  • tm: An opaque structure that holds a date and time.
  • ...