ミューテックスとチャネルをいつ使用するか: Go 同期のニーズにはどちらが適していますか?

import (
    "sync"
    "fmt"
)

var m sync.Mutex
var counter int

func main() {
    // Start multiple goroutines to increment the counter concurrently
    for i := 0; i < 1000; i++ {
        go func() {
            m.Lock()
            defer m.Unlock()
            counter++
            fmt.Println(counter)
        }()
    }

    // Wait for all goroutines to finish
    time.Sleep(time.Second)
    fmt.Println("Final count:", counter)
}

import (
    "fmt"
    "time"
)

func main() {
    ball := make(chan *Ball)

    go player("ping", ball)
    go player("pong", ball)

    // Send the initial ball to start the game
    ball <- new(Ball)

    // Allow the game to run for a short period
    time.Sleep(time.Second)

    // Close the channel to stop the game
    close(ball)
}

func player(name string, ball chan *Ball) {
    for {
        // Receive the ball from the channel
        b := <-ball
        if b == nil {
            fmt.Println("Game over!")
            break
        }

        // Increment the ball's hits
        b.hits++
        fmt.Println(name, b.hits)

        // Send the ball back to the channel
        ball <- b
    }
}