一个信号量与定时器的例子(Golang)

        程序可用来定时执行一些任务，并通过信号量处理，在被强制中断时，也能做相应警告及清理处理.  

package main

//信号量与定时器
//author: Xiong Chuan Liang
//date: 2015-2-25

import "fmt"
import "os"
import "os/signal"
import "time"

func main() {

  sigs := make(chan os.Signal, 1)
  done := make(chan bool, 1)

  signal.Notify(sigs, os.Interrupt, os.Kill)

  go func() {
    sig := <-sigs
    switch sig {
    case os.Interrupt:
      fmt.Println("signal: Interrupt")
    case os.Kill:
      fmt.Println("signal: Kill")
    default:
      fmt.Println("signal: Others")
    }
    done <- true
  }()

  fmt.Println("awaiting signal")

  //main()....
  go JobTicker(done)
  <-done
  close(done)
  //app.Exit()
  fmt.Println("exiting")
}

func JobTicker(done <-chan bool) {
  ticker := time.NewTicker(time.Second)
  defer ticker.Stop()

  for {
    select {
    case <-done:
      return
    case <-ticker.C:
      fmt.Println("job......")
    }
  }
}

如果按 ctrl-C 则结果如下:

awaiting signal
job......
job......
signal: Interrupt
interrupt
exiting

Go by Example: Signals:    ​​ https://gobyexample.com/signals​​