tutorials/arvo/behn.md · urbit.org

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2title = "Behn"

3weight = 3

4template = "doc.html"

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6Our simple timer.

8It allows vanes and applications to set and timer events, which are

9managed in a simple priority queue. `%behn` produces effects to start

10the unix timer, and when the requested `%behn` passes, unix sends wake

11events to `%behn`, which time routes back to original sender. We don't

12guarantee that a timer event will happen at exactly the `%behn` it was

13set for, or even that it'll be particularly close. A timer event is a

14request to not be woken until after the given time.

16`%eyre` uses `%behn` for timing out sessions, and `%clay` uses `%behn`

17for keeping track of time-specified file requests. `%ames` should

18probably use `%behn` to keep track of things like network timeouts and

19retry timing, but it currently uses its own alarm system.

21This article is a stub. For more information, see either `behn.hoon` or [Lesson 2.6 - Behn](@/docs/tutorials/hoon/behn.md) of the Hoon tutorial.