How Golang implements the timeout mechanism

When using goroutine, I want to avoid blocking caused by program timeout. (e.g. file reading)

Can you give me some sample code. Thanks a lot!

>Solution :

If I understand you correctly, here are the code you want:

go func() {
    for {
        select {
        case num := <-ch: //If there is data, it is printed below. But there is a possibility that "ch" has been no data
            fmt.Println("num = ", num)
        case <-time.After(3 * time.Second): //The above ch if there has been no data will block, then select will also detect other case conditions, detected 3 seconds after the timeout
            fmt.Println("timeout")
            quit <- true 
        }
    }

}() //Don't forget()

I hope I can help you! Let me know if this work.