Reliable way to ensure a Go channel does not block

Question

I'm looking for a reliable to way to make sure an empty channel in Go does not block my execution. I have to iterate through a number of channels in a particular order (kind of priorities), and once I find one with items in it, read one.

Currently I do something in a similar way:

if len(myChannel) > 0 {
    // Possible issue here: length could have changed to 0 making this blocking
    elm := <- myChannel
    return elm
}

In theory this could result into too-long of waiting, while a different channel might have an item which is ready to be "served".

Any suggestions on how to improve? I could use a mutex in the channel, but it feels like there's a better solution although I'm not sure how.

Answer 1

Waitting for answers