Mutex Section

A sync.Mutex marks the critical section that changes shared state.

mutex_section.go

package main

import (
	"fmt"
	"sync"
)

func main() {
	var bonus = 
	var mutex sync.Mutex
	total := 10

	mutex.Lock()
	total += bonus
	mutex.Unlock()

	fmt.Println("bonus=", bonus)
	fmt.Println("total=", total)
	fmt.Println("lockedSection=", true)
}

package main

import (
	"fmt"
	"sync"
)

func main() {
	var bonus = 
	var mutex sync.Mutex
	total := 10

	mutex.Lock()
	total += bonus
	mutex.Unlock()

	fmt.Println("bonus=", bonus)
	fmt.Println("total=", total)
	fmt.Println("lockedSection=", true)
}

package main

import (
	"fmt"
	"sync"
)

func main() {
	var bonus = 
	var mutex sync.Mutex
	total := 10

	mutex.Lock()
	total += bonus
	mutex.Unlock()

	fmt.Println("bonus=", bonus)
	fmt.Println("total=", total)
	fmt.Println("lockedSection=", true)
}

mutex A mutex makes a critical section explicit so only one flow should update shared state at a time.