Kas kasutas sync.WaitGroup-mehhanismi oma projektides?

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

Working principle:

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

Example:

var wg sync.WaitGroup

wg.Add(2) // waiting for 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 useful for coordinating parallel operations and preventing premature termination of the program.