about synchronization in go

gistfile1.txt

according to http://golang.org/ref/mem (especially the last example)

Will BenchmakTCP be guarantted to read tcpStarted = true next time?
Will server be guaranteed to Listen before client's Dial??

func BenchmarkTCP(b *testing.B) {
        done := make(chan bool, 10)

        if !tcpStarted {
                go startServer()
        }

        b.ResetTimer()
        for i := 0; i < b.N; i++ {
                for i := 0; i < 10; i++ {
                        go client(done)
                }

                for i := 0; i < 10; i++ {
                        <-done
                }
        }
}

func startServer() {
        tcpStarted = true
        ln, err := net.Listen("tcp", ":7777")
        if err != nil {
                panic(err)
        }

        for {
                conn, err := ln.Accept()
                if err != nil {
                        panic(err)
                }
                go io.Copy(conn, conn)
        }
}