On Tue, Sep 2, 2025 at 2:36 PM Jason E. Aten <j.e.a...@gmail.com> wrote:
> On Tuesday, September 2, 2025 at 7:09:02 PM UTC+1 David Finkel wrote: > > I don't think channel receive order is random when the senders are blocked. > Sending goroutines are queued in a linked list in FIFO order within the > runtime's channel struct (hchan) > <https://cs.opensource.google/go/go/+/master:src/runtime/chan.go;l=45;drc=a8564bd412d4495a6048f981d30d4d7abb1e45a7> > > > Interesting--thanks for pointing this out, David. > > I think this is an implementation detail rather than a promise made by the > language spec, no? > i.e. something that is subject to change since the specification does not > guarantee it. > Good point. I just rechecked the language spec to be sure, and yeah, that's not guaranteed. > > In other words: beginners, you should not depend on it. Arguably since its > not in the spec, it > ought to be randomized to prevent assuming it will always hold... since it > could change in the future. > Good advice. > > For replies I use the ticket + close-a-done-channel pattern, rather than > single reply channel. Thus the > worker never has to block itself once it is done with the work, and > multiple parties can > observe that the job has finished if they have a pointer to it. See for > example https://go.dev/play/p/ggviji5FfYz > That's definitely a useful strategy in cases where you might have multiple observers. > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion visit > https://groups.google.com/d/msgid/golang-nuts/52d5a833-3b7e-47a2-a95a-5c2d6da63cacn%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/52d5a833-3b7e-47a2-a95a-5c2d6da63cacn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/golang-nuts/CANrC0BiKc%3DAfG13-%3D3mLv3XYxAT9mrRWDTovNcAoY8k_YNjo-A%40mail.gmail.com.
