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)

Studying an example of stateless, cache–aligned allocator

In this example, we will create a stateless, equal allocator designed to allocator cache-aligned memory. The goal of this allocator is to show a C++17 allocator that can be leveraged to increase the efficiency of the objects a container is storing (for example, a linked list), as cache-thrashing is less likely to occur.

To start, we will define the allocator as follows:

template<typename T, std::size_t Alignment = 0x40>
class myallocator

using value_type = T;
using pointer = T *;
using size_type = std::size_t;
using is_always_equal = std::true_type;

template<typename U> struct rebind {
using other = myallocator<U, Alignment>;


{ }

template <typename U>
myallocator(const myallocator<U, Alignment> &other) noexcept