> > Querying the state of a channel at worst leads to race conditions and at > best leads to bad design. >
The open/closed state of a channel is simple to reason about (it only changes, if ever, once), unlike the rest of state that is associated to a given channel... You're only supposed to close a channel from the producer side. > Why? On Fri, Jul 12, 2013 at 9:22 PM, Brandon Bloom <brandon.d.bl...@gmail.com>wrote: > > However, if what one is trying is to *stop* putting values on the > channel, I see no possible race conditions. > > Querying the state of a channel at worst leads to race conditions and at > best leads to bad design. > > You're only supposed to close a channel from the producer side. So if > you're the only writer, then you know if you've closed the channel or not. > If there are multiple writers, then need to be coordinated in some way. > Typically, they would alt! against reading from a control channel and > writing to the output channel. When you get a shutdown signal from the > control channel, you stop writing. > > -- > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to a topic in the > Google Groups "Clojure" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/clojure/_KzEoq0XcHQ/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
