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Go by Example - Channel Synchronization

翻译自 https://gobyexample.com/

Go by Example

Go is an open source programming language designed for building simple, fast, and reliable software.

Go by Example is a hands-on introduction to Go using annotated example programs. Check out the first example or browse the full list below.

Go by Example: Channel Synchronization

我们可以使用channel来同步不同goroutine的执行。

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package main
import "fmt"
import "time"
// 定义一个函数,接收一个channel作为参数,该参数用来通知另一个goroutine该函数已经执行完毕
func worker(done chan bool) {
fmt.Println("working...")
time.Sleep(time.Second)
fmt.Println("done")
// 将成功信号发往channel
done <- true
}
func main() {
done := make(chan bool)
// 启动新的goroutine执行worker函数,并出入channel
go worker(done)
// 接收channel中的值
// 如果移除这一句可能收不到任何输出,因为程序可能在worker函数还未执行已经结束了
<-done
}
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$ go run channel-synchronization.go
working...
done

原文链接:Go by Example: Channel Synchronization