Yes, I can help.
In this line:
r_loc = new Array[RemoteArray[Double]](Dv_tmp.region(),
(r:Point(1)) => {(new RemoteArray(*v_loc*(r)))});
you created a closure that references a field of "this".
If this closure is passed to another place, then "this" will be serialized.
However, "this" is still half-baked, i.e., it's constructor didn't finish
yet.
Therefore, "this" cannot escape to closures in a constructor.
Work-around:
you need to use a local (not a field):
val v_loc = ...;
and use that local in the closure:
(r:Point(1)) => {(new RemoteArray(*v_loc*(r)))});
Cheers,
Yoav
On Tue, Jan 18, 2011 at 1:42 PM, Christoph Pospiech <
christoph.pospi...@de.ibm.com> wrote:
> Hi,
>
> the following code snippet
>
> public class matmul {
> [...]
> static type Array1D = Array[Double]{rank==1};
> [...]
> val v_loc: Array[Array1D]{rank==1};
> val r_loc: Array[RemoteArray[Double]]{rank==1};
>
> /**
> * special constructor
> */
> public def this(n:Int, axis:Int, Dprint: Boolean) {
> [...]
> v_loc = new Array[Array1D](Dv_tmp.region(),
> (r:Point(1)) => {(new Array[Double]((0..n-1),
> ( 0.0 as Double))) } );
> r_loc = new Array[RemoteArray[Double]](Dv_tmp.region(),
> (r:Point(1)) => {(new RemoteArray(v_loc(r)))});
> /* the line above is line 93 */
> }
> [...]
> }
>
> produces this compiler error message with X10 v.2.1.1.
>
> /home/cp/xample/MatMul/mm_X10/src/matmul.x10:93: 'this' or 'super' cannot
> escape via a closure during construction.
>
> Perhaps this message is obvious or clear for others but I am lost here. Can
> anyone explain what it means ? Sorry for this dumb question !
>
> --
>
> Mit freundlichen Grüßen / Kind regards
>
> Dr. Christoph Pospiech
> High Performance & Parallel Computing
> Phone: +49-351 86269826
> Mobile: +49-171-765 5871
> E-Mail: christoph.pospi...@de.ibm.com
> -------------------------------------
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>
>
>
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