Book Image

Hands-On System Programming with Go

By : Alex Guerrieri
Book Image

Hands-On System Programming with Go

By: Alex Guerrieri

Overview of this book

System software and applications were largely created using low-level languages such as C or C++. Go is a modern language that combines simplicity, concurrency, and performance, making it a good alternative for building system applications for Linux and macOS. This Go book introduces Unix and systems programming to help you understand the components the OS has to offer, ranging from the kernel API to the filesystem. You'll then familiarize yourself with Go and its specifications. You'll also learn how to optimize input and output operations with files and streams of data, which are useful tools in building pseudo-terminal applications. You'll gain insights into how processes communicate with each other, and learn about processes and daemon control using signals, pipes, and exit codes. This book will also enable you to understand how to use network communication using various protocols, including TCP and HTTP. As you advance, you'll focus on Go's best feature - concurrency, which will help you handle communication with channels and goroutines, other concurrency tools to synchronize shared resources, and the context package to write elegant applications. By the end of this book, you will have learned how to build concurrent system applications using Go
Table of Contents (24 chapters)
Free Chapter
Section 1: An Introduction to System Programming and Go
Section 2: Advanced File I/O Operations
Section 3: Understanding Process Communication
Section 4: Deep Dive into Concurrency
Section 5: A Guide to Using Reflection and CGO


In this chapter, we reviewed the Go memory model for interfaces in detail, highlighting that an interface always contains a concrete type. We used this information to get a better look at type casting and understand what happens when an interface gets cast to another.

Then, we introduced the basic mechanics of reflection, starting with type and value, which are the two main types of the package. They represent, respectively, the type and value of a variable. Value allows you to read a variable content and also to write it if the variable is addressable. In order to be addressable, a variable needs to be accessed from its address, using a pointer, for instance.

We also saw how complex data types can be handled with reflection, seeing how to access structure field value. Data types of structure can be used to get metadata about fields, including name and tags, which are...