Book Image

Effective Concurrency in Go

By : Burak Serdar
Book Image

Effective Concurrency in Go

By: Burak Serdar

Overview of this book

The Go language has been gaining momentum due to its treatment of concurrency as a core language feature, making concurrent programming more accessible than ever. However, concurrency is still an inherently difficult skill to master, since it requires the development of the right mindset to decompose problems into concurrent components correctly. This book will guide you in deepening your understanding of concurrency and show you how to make the most of its advantages. You’ll start by learning what guarantees are offered by the language when running concurrent programs. Through multiple examples, you will see how to use this information to develop concurrent algorithms that run without data races and complete successfully. You’ll also find out all you need to know about multiple common concurrency patterns, such as worker pools, asynchronous pipelines, fan-in/fan-out, scheduling periodic or future tasks, and error and panic handling in goroutines. The central theme of this book is to give you, the developer, an understanding of why concurrent programs behave the way they do, and how they can be used to build correct programs that work the same way in all platforms. By the time you finish the final chapter, you’ll be able to develop, analyze, and troubleshoot concurrent algorithms written in Go.
Table of Contents (13 chapters)

Compare and swap

Any time you test for a condition and act based on the result, you can create a race condition. For example, the following function does not prevent mutual exclusion, despite the use of atomics:

var locked sync.Bool
func wrongCriticalSectionExample() {
     if !locked.Load() {
          // Another goroutine may lock it now!
          defer locked.Store(false)
          // This goroutine enters critical section
          // but so can another goroutine

The function starts by testing whether the atomic locked value is false. Two goroutines can execute this statement simultaneously, and seeing that it is false, both can enter the...