Go Fundamentals: Gopher Guides

13. Synchronization

In Chapter 11, we explained how to use channels for passing data between goroutines. Then in Chapter 12, we discussed how to use the context¹ package to manage the cancellation of goroutines. In this chapter, we cover the final part of concurrent programming: synchronization.

1. https://pkg.go.dev/context

We show you how to wait for a number of goroutines to finish. We explain race conditions,² how to find them using Go’s -race³ flag, and how to fix them with sync.Mutex⁴ and sync.RWMutex.⁵

2. https://en.wikipedia.org/wiki/Race_condition

3. https://golang.org/doc/articles/race_detector

4. https://pkg.go.dev/sync#Mutex

5. https://pkg.go.dev/sync#RWMutex

Finally, we discuss how to use sync.Once to ensure a function is only executed ...