Kshitij Mehta wrote:
> Hello
> I am running an x10 1.7 application using the java backend. I am using a
> block distribution on an array and I get a badplaceexception when i use
> ateach on the array. I understand this is caused when i try to access an
> array value that resides on another place. Can someone show a small example
> on how to fix it? Please note that I cannot make the array a val object, it
> has to be a 'var'.
>
The basic idea is to ensure that each array element is read or written
at the place at which it resides. So the typical idiom is
ateach(p in a.dist) {
// read a(p) or write a(p)
}
or you can use the idiom expressed in the following piece of code:
val R = 1..1000;
val D = Dist.makeBlock(R, 0);
val A = Array.make[Int](D, ((p): Point)=>p);
val places = A.dist.places();
finish for (p in places) async at(p) {
val myR:Region(1) = (A|p).region as Region(1);
var sum:Int=0;
for (q in myR)
sum += A(q);
Console.OUT.println("sum at " + p + " is " + sum);
}
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