如何在Go中选择？

Question

In Unix select is used to wait for more than one input source. Select waits until one input source becomes ready.

How to do this in Go?

I found a Select in Go but this seams to be a thin wrapper around the Unix function, because it works on file descriptors.

How to wait for more than one connection, in particular UnixConn connections used for Unix Domain Sockets?

Answer 1

package main

import (
    "fmt"
)

type Message struct {
    Payload int
}

func main() {
    var inA *Message
    var inB *Message

    rxA := make(chan *Message)
    rxB := make(chan *Message)

    go func(txA chan *Message){
      txA <- &Message{Payload: 1} 
    }(rxA)

    go func(txB chan *Message){
      txB <- &Message{Payload: 2} 
    }(rxB)

    for {
        select {
            case inA = <- rxA:
            case inB = <- rxB:
        }
        if inA != nil && inB != nil {
            fmt.Println(inA.Payload + inB.Payload)
            break
        }
    }
}