DiskLoc CappedIterator::getNext() {
DiskLoc ret = _curr;
const NamespaceDetails* nsd = _collection->_details;
const ExtentManager* em = _collection->getExtentManager();
// Move to the next thing.
if (!isEOF()) {
_curr = getNextCapped(nsd, em, _curr, _direction );
}
else if (_tailable && !_prev.isNull()) {
// If we're tailable, there COULD have been something inserted even though we were
// previously EOF. Look at the next thing from 'prev' and see.
DiskLoc newCurr = getNextCapped(nsd, em, _prev, _direction);
if (!newCurr.isNull()) {
// There's something new to return. _curr always points to the next thing to
// return. Update it, and move _prev to the thing we just returned.
ret = _prev = newCurr;
_curr = getNextCapped(nsd, em, _prev, _direction);
}
}
return ret;
}
DiskLoc CappedRecordStoreV1Iterator::getNext() {
DiskLoc ret = _curr;
// Move to the next thing.
if (!isEOF()) {
_prev = _curr;
_curr = getNextCapped(_curr);
}
else if (_tailable && !_prev.isNull()) {
// If we're tailable, there COULD have been something inserted even though we were
// previously EOF. Look at the next thing from 'prev' and see.
DiskLoc newCurr = getNextCapped(_prev);
if (!newCurr.isNull()) {
// There's something new to return. _curr always points to the next thing to
// return. Update it, and move _prev to the thing we just returned.
_prev = ret = newCurr;
_curr = getNextCapped(_prev);
}
}
return ret;
}