Nope.
here's the source:
Clojure classpath initialized by cljr.
user=> (source promise)
(defn promise
"Alpha - subject to change.
Returns a promise object that can be read with deref/@, and set,
once only, with deliver. Calls to deref/@ prior to delivery will
block. All subsequent derefs will return the same delivered value
without blocking."
{:added "1.1"}
[]
(let [d (java.util.concurrent.CountDownLatch. 1)
v (atom nil)]
(reify
clojure.lang.IDeref
(deref [_] (.await d) @v)
clojure.lang.IFn
(invoke [this x]
(locking d
(if (pos? (.getCount d))
(do (reset! v x)
(.countDown d)
this)
(throw (IllegalStateException. "Multiple deliver calls to a
promise"))))))))
2010/9/14 Sunil S Nandihalli <[email protected]>
> Hello Everybody,
> Let us say I have something like
>
> (def s (promise))
> .
> .
> .
> .
> now can I check if the promise hase been delivered ..
>
> Thanks
> Sunil.
>
>
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