Hi Tiago,
I think my description is in agreement with yours. If I translate my
understanding it to an explicitly clocked version, I get the following:
import x10.io.Console;
class Test5 {
public static def main(Rail[String]) {
var x: Long = -1;
val c1: Clock = Clock.make();
finish {
async clocked (c1) {
finish {
val c2: Clock = Clock.make();
c2.advance();
c2.advance();
x= 1;
}
}
async clocked (c1) {
finish {
val c3: Clock = Clock.make();
c3.advance();
c3.advance();
c3.advance();
x= 0;
}
}
c1.advance();
x = 3;
}
Console.OUT.println("x="+x);
}
}
which returns x=3 as I expected. I believe there is either a bug in the
implementation or an error in my translation/understanding.
Thanks,
Tomofumi Yuki
----- Original Message -----
> From: "Tiago Cogumbreiro" <[email protected]>
> To: "Mailing list for users of the X10 programming language"
> <[email protected]>
> Sent: Thursday, December 4, 2014 2:31:11 PM
> Subject: Re: [X10-users] Nested Implicit Clock Behavior
>
> Hello again Tomofumi,
>
> Each "clocked finish" introduces a new scope of an implicit clock so the
> three activities are operating on *distinct* clocks.
>
> Additionally, note that the termination of both clocked asyncs synchronize
> with the outermost Clock.advanceAll.
>
> I can send you the explicit version of the same example if you want.
>
> Cheers,
>
> Tiago
>
> On Thu Dec 04 2014 at 9:36:03 AM Tomofumi Yuki <[email protected]>
> wrote:
>
> > Hi again,
> >
> > Thank you for your quick feedback. I did test the same code again with
> > 2.5.1 and submitted a bug report. In fact, I had a question about a more
> > complicated case before I encountered the bug earlier.
> >
> > With the following code:
> >
> > import x10.io.Console;
> >
> > class Test1 {
> > public static def main(Rail[String]) {
> > var x: Long = -1;
> >
> > clocked finish {
> > clocked async {
> > clocked finish {
> > Clock.advanceAll();
> > Clock.advanceAll();
> > x= 1;
> > }
> > }
> > clocked async {
> > clocked finish {
> > Clock.advanceAll();
> > Clock.advanceAll();
> > Clock.advanceAll();
> > x= 0;
> > }
> > }
> > Clock.advanceAll();
> > x = 3;
> > }
> >
> > Console.OUT.println("x="+x);
> > }
> > }
> >
> > I get the following output:
> >
> > $x10c++ Test1.x10 -o Test1; ./Test1
> > x=0
> >
> > However, I expect x=3 as output.
> >
> > The manual mentions that the inner clocked finish operates within a single
> > phase of the outer one. Therefore the last advance should halt the primary
> > activity until activities for both clocked asyncs terminate, since all
> > other calls to Clock.advanceAll is inside another clocked finish.
> >
> > Is my interpretation correct?
> >
> > Thanks,
> > Tomofumi Yuki
> >
> > ------------------------------------------------------------
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>
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