Have you used the synchronization mechanism with sync.WaitGroup in your projects?

Yes, in Go projects, sync.WaitGroup is often used for goroutine synchronization. This mechanism allows waiting for a group of parallel tasks to complete before proceeding.

Working principle:

• An object WaitGroup is created.
• Before starting each goroutine, Add(1) is called to increment the counter.
• Inside the goroutine, after completing its work, Done() is called to decrement the counter.
• The main goroutine calls Wait(), which blocks until the counter reaches zero.

Example:

var wg sync.WaitGroup

wg.Add(2) // expecting 2 goroutines

go func() {
    defer wg.Done()
    // work of the first goroutine
}()

go func() {
    defer wg.Done()
    // work of the second goroutine
}()

wg.Wait() // wait for both to finish

This is convenient for coordinating parallel operations and preventing premature program termination.