// select.go

package main

import (

"fmt"

"time"

//"time"

)

func main() {

//声明一个channel

ch := make(chan int)

//声明一个匿名函数,传入一个参数整型channel类型ch

go func(ch chan int) {

ch

//往channel写入一个数据,此时阻塞

}(ch)

//由于goroutine执行太快,先让它sleep 1秒

time.Sleep(time.Second)

select {

//读取ch,解除阻塞

case

fmt.Print("come to read ch!")

default:

fmt.Print("come to default!")

}

}

// select.go

//整型channel类型ch一直处于读取状态,所以处于阻塞,使用select实现超时控制

package main

import (

"fmt"

"time"

)

func main() {

ch := make(chan int)

//buffer channel,1个元素前非阻塞

timeout := make(chan int, 1)

go func() {

time.Sleep(time.Second)

//写channel

timeout

}()

select {

//读channel

case

fmt.Print("come to read ch!")

//没有读到channel,实现超时控制

case

fmt.Print("come to timeout!")

}

fmt.Print("end of code!")

}

// select.go

//使用time.After实现超时控制

package main

import (

"fmt"

"time"

)

func main() {

ch := make(chan int)

select {

case

fmt.Print("come to read ch!")

case

fmt.Print("come to timeout!")

}

fmt.Print("end of code!")

}

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