Ganesh Venkateshwara <tovgan...@yahoo.co.in> wrote on 03/19/2010 01:27:51
AM:
> Hi,
>
> I am trying to use await with an async operation as in the attached
> code. The code compiles, but it simply waits infinitely at the await
statement.
> I am most probably doing something strange, and await is not expected
> to work like this?
>
> Let me know if any of you have tried using await for such scenario.
Hi, Ganesh,
I believe you're only guaranteed to see the results of an atomic update
in the when (await) expression. Try changing the relevant lines to
async atomic inc.increment();
await inc.incremented;
Hope this helps,
Igor
> -----------------------------------------------------
> public class test {
> class Incrementor {
> var i:Int;
> var incremented:Boolean;
>
> public def this() {
> i = 0;
> incremented = false;
> }
>
> public def increment() {
> Console.OUT.println("Entering increment(): " + incremented);
>
> i++;
> incremented = true;
>
> Console.OUT.println("Leaving increment(): " + incremented);
> }
> }
>
> def func() {
> val inc = new Incrementor();
>
> async inc.increment();
> await inc.incremented;
>
> Console.OUT.println("Its done: " + inc.i);
> }
>
> public static def main(args:Rail[String]) {
> (new test()).func();
> }
> }
> -----------------------------------------------------
--
Igor Peshansky (note the spelling change!)
IBM T.J. Watson Research Center
X10: Parallel Productivity and Performance (http://x10-lang.org/)
XJ: No More Pain for XML's Gain (http://www.research.ibm.com/xj/)
"I hear and I forget. I see and I remember. I do and I understand" --
Confucius
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