await(clojure.core)

Blocks the current thread (indefinitely!) until all actions dispatched thus far, from this thread or agent, to the agent(s) have occurred.

; clojure/core.clj:1792
(defn await
  [& agents]
  (io! "await in transaction"
    (when *agent*
      (throw (new Exception "Can't await in agent action")))
    (let [latch (new java.util.concurrent.CountDownLatch (count agents))
          count-down (fn [agent] (. latch (countDown)) agent)]
      (doseq [agent agents]
        (send agent count-down))
      (. latch (await)))))

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