44 lines
529 B
Go
44 lines
529 B
Go
|
package main
|
|||
|
|
|
|||
|
|
import (
|
|||
|
|
"fmt"
|
|||
|
|
"sync"
|
|||
|
|
"time"
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
var wg sync.WaitGroup
|
|||
|
|
|
|||
|
|
//var notify bool
|
|||
|
|
|
|||
|
|
//var exitChan chan bool = make(chan bool, 1)
|
|||
|
|
|
|||
|
|
// why context
|
|||
|
|
|
|||
|
|
func f() {
|
|||
|
|
defer wg.Done()
|
|||
|
|
//loop:
|
|||
|
|
for {
|
|||
|
|
fmt.Println("hello world")
|
|||
|
|
time.Sleep(time.Millisecond * 500)
|
|||
|
|
//if notify {
|
|||
|
|
// break
|
|||
|
|
//} //变量
|
|||
|
|
//select {
|
|||
|
|
//case <-exitChan:
|
|||
|
|
// break loop
|
|||
|
|
//default:
|
|||
|
|
//} //channel 版本
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
func main() {
|
|||
|
|
wg.Add(1)
|
|||
|
|
go f()
|
|||
|
|
time.Sleep(time.Second * 3)
|
|||
|
|
//如何通知goroutine退出？
|
|||
|
|
//exitChan <- true
|
|||
|
|
wg.Wait()
|
|||
|
|
|
|||
|
|
}
|