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