Simple approach to get Goroutine ID

goid.go

var goroutineID uint64

// Go is a simple replacement for `go` keyword, but returns its ID.
// Go also passes the goroutine ID to function `f`.
// Only use it when you want to use the ID attached with function `f` executed by a goroutine.
// Otherwise, just use nornal `go` keyword.
func Go(f func(goroutineID uint64)) uint64 {
  id := atomic.AddUint64(&goroutineID, 1)
  go f(id)
  return id
}