Go で同時実行する goroutine 間の相互排他を実現するために、WaitGroups と Mutex をどのように使用できますか?

<code class="go">package main

import (
    "fmt"
    "rand"
    "sync"
)

var (
    mutex1, mutex2, mutex3 sync.Mutex
    wg sync.WaitGroup
)

func Routine1() {
    mutex1.Lock()
    defer mutex1.Unlock() // Ensure mutex is always unlocked before returning
    // do something

    // Sending and printing events should be mutually exclusive
    for i := 0; i < 200; i++ {
        mutex2.Lock()
        defer mutex2.Unlock()
        mutex3.Lock()
        defer mutex3.Unlock()
        fmt.Println("value of z")
    }

    // do something
}

func Routine2() {
    mutex2.Lock()
    defer mutex2.Unlock()
    // do something

    // Sending and printing events should be mutually exclusive
    for i := 0; i < 200; i++ {
        mutex1.Lock()
        defer mutex1.Unlock()
        mutex3.Lock()
        defer mutex3.Unlock()
        fmt.Println("value of z")
    }

    // do something
}

func Routine3() {
    mutex3.Lock()
    defer mutex3.Unlock()
    // do something

    // Sending and printing events should be mutually exclusive
    for i := 0; i < 200; i++ {
        mutex1.Lock()
        defer mutex1.Unlock()
        mutex2.Lock()
        defer mutex2.Unlock()
        fmt.Println("value of z")
    }

    // do something
}

func main() {
    wg.Add(3)
    go Routine1()
    go Routine2()
    Routine3()
    wg.Wait() // Wait for all goroutines to complete
}</code>