如何在 Golang 中使读写文件并发？答案

func DoSomething()

这是 web_server.go 的代码：

 package main
 import (
    sp "./some_package"
    "log"
    "net"
    "os"
    "net/http"
   )

func main() {

  l, err := net.Listen("tcp", "0.0.0.0" + ":" + "4567")
  if err != nil {
    log.Println("Error listening:", err.Error())
    os.Exit(1)
  }
  defer l.Close()
  log.Println("Listening on 0.0.0.0:4567")  
  go func() {
    for {
        // Listen for an incoming connection.
        conn, err := l.Accept()
        if err != nil {
            log.Println("Error accepting: ", err.Error())
            os.Exit(1)
        }
        // Handle connections in a new goroutine.
        go handlerFunction(conn)
    }
  }()

  log.Printf("Setting up the Webserver...")
  err = http.ListenAndServe("0.0.0.0:"+"4568", nil)
  if err != nil {
    log.Fatal(err)
  }
}

func handlerFunction(conn net.Conn) {
  defer conn.Close()
  sp.DoSomething()
}

DoSomething()

package some_package
import (    
    "io/ioutil"
    "strconv"
    "os"
    "log"
   )
func IncrementValue(pastValue string)(newValue string){
  newValueInt, _ := strconv.Atoi(pastValue)
  return strconv.Itoa(newValueInt + 1)
}

func DoSomething() (err error){
  initialValue := "1"
  filename := "myFile.txt"
  if _, err := os.Stat(filename); err == nil {
    someText, err := ioutil.ReadFile(filename)
    if err != nil {
        log.Printf("Error reading")
        return err
    }
    newValue := IncrementValue(string(someText))

    err = ioutil.WriteFile(filename,[]byte(newValue), 0644)
    if err != nil { 
        return err
    }
  }else{
    err = ioutil.WriteFile(filename,[]byte(initialValue), 0644)
    if err != nil { 
        return err
    }
  }
  return
 }

mutex.Lockmutex.Unlock

我的示例是否适合在读取或写入文件时并发？

这是正确的做法吗？谢谢你