Hi,
I have a few questions that don't seem covered in the docs:
1) The associative array example seems to imply that you need to first
update the domain before you use the key as an accessor, however I've
empirically found that you can do the assignment and the key gets added.
Is this expected behavior?
2) Regarding concurrency, it seems intuitively the case that operations on
an associate domain and the array should be thread / task safe, but i'm
curious if there are any precautions I should be taking. I've empirically
found that it seems to be safe, but wonder what the official guidance is.
Here's a little snippet I used to test some ideas:
use Random;
var Indices: domain(real);
var Entries: [Indices] real;
proc writeEntryForIndex(idx: real) {
writeln("key: ", idx, " value: ", Entries[idx]);
}
proc dumpEntries() {
writeln('dumping entries');
for idx in Indices.sorted() {
writeEntryForIndex(idx);
}
writeln();
}
// add w/o previously updating the domain
Entries[0] = 2.71828;
dumpEntries();
Entries[1] = 3.141592;
dumpEntries();
// add a bunch of keys in parallel
coforall i in 1..here.maxTaskPar {
var randStream: RandomStream = new RandomStream();
for j in 1..10 {
var key = randStream.getNext();
var value = randStream.getNext();
writeln("task #", j, " adding key: ", key, " value: ", value);
Entries[key] = value;
}
}
dumpEntries();
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