[Qt-interest] QHash::const_iterator not reentrant?

[BOUCARD Olivier]

Hi everybody,

I have a problem with QHash and const_iterator.
I have two QHash instance with their respective const_iterator in two different thread.
And it cause crash when I iterate on both at the same time.
I have made a little research and found that there is a static function QHashData::Node *QHashData::nextNode(Node *node).
And I think the problem come from here, the code seems not reentrant:

QHashData::Node *QHashData::nextNode(Node *node)
{
    union {
        Node *next;
        Node *e;
        QHashData *d;
    };
    next = node->next;
    Q_ASSERT_X(next, "QHash", "Iterating beyond end()");
    if (next->next)
        return next;

    int start = (node->h % d->numBuckets) + 1;
    Node **bucket = d->buckets + start;
    int n = d->numBuckets - start;
    while (n--) {
        if (*bucket != e)
            return *bucket;
        ++bucket;
    }
    return e;
}

Someone could confirm that, please.
Any alternative, workaround, ... if it is confirmed?


Thank you.

Olivier.
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