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

Chapter 15

  1. What's the memory representation of an interface in Go?
    An interface in Go is represented by two values—the first one is the interface concrete type, while the second is the value for such a type.
  2. What happens when an interface type is casted to another one?
    Since interface values need to be a concrete value, and cannot be another interface, a new interface is created with a different type and the same concrete value.
  3. What are Value, Type, and Kind in reflection?
    A Value, as the name suggests, represents the content of a variable; a Type represents the Go type of a variable; and Kind is the memory representation of a Type and refers only to built-in types.
  4. What does it mean that a value is addressable?
    An addressable value is a value that can be edited because it has been obtained by a pointer.
  5. Why are structure field tags important in Go?