signal parent function to return from goroutine | Discord Gophers | Page 1

potent grail Dec 11, 2023, 4:23 AM

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    go func() {
        for {
            err := conn.WriteControl(websocket.PingMessage, nil, time.Now().Add(time.Second*10))
            if err != nil {
                fmt.Println(err)
                return
            }
            time.Sleep(time.Second * 2)
        }
    }()

    //read messages from the client
    for {
        _, data, err := conn.ReadMessage()
        if err != nil {
            fmt.Println(err)
            return
        }

        buffer <- data
    }

I have the above code, the go routine checks to see if the connection is alive every 10 seconds if its not how do I signal to the parents function to return? conn.Readmessage blocks execution.

viscid pollen Dec 11, 2023, 4:37 AM

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two ways:

call SetReadDeadline, check a atomic variable every 10 seconds
close the connection in the check loop, and ReadMessage will return

potent grail Dec 11, 2023, 4:50 AM

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viscid pollen two ways: 1. call `SetReadDeadline`, check a atomic variable every 10 seconds 2....

closing the connection in the check loop does not work because i think its hanging on the channel? can you give an example for 1. i dont know what you mean

potent grail Dec 11, 2023, 5:57 AM

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got it, i closed the channel in addition to the connection in the check loop

#signal parent function to return from goroutine