C++ scoped_ptr::count方法代码示例

//.........这里部分代码省略.........
        mutablebson::Document& doc = driver->getDocument();
        mutablebson::DamageVector damages;

        // Used during iteration of docs
        BSONObj oldObj;

        // Get first doc, and location
        Runner::RunnerState state = Runner::RUNNER_ADVANCED;

        uassert(ErrorCodes::NotMaster,
                mongoutils::str::stream() << "Not primary while updating " << nsString.ns(),
                !request.shouldCallLogOp()
                || repl::getGlobalReplicationCoordinator()->canAcceptWritesForDatabase(
                        nsString.db()));

        while (true) {
            // Get next doc, and location
            DiskLoc loc;
            state = runner->getNext(&oldObj, &loc);

            if (state != Runner::RUNNER_ADVANCED) {
                if (state == Runner::RUNNER_EOF) {
                    // We have reached the logical end of the loop, so do yielding recovery
                    break;
                }
                else {
                    uassertStatusOK(Status(ErrorCodes::InternalError,
                                           str::stream() << " Update query failed -- "
                                                         << Runner::statestr(state)));
                }
            }

            // We fill this with the new locs of moved doc so we don't double-update.
            if (updatedLocs && updatedLocs->count(loc) > 0) {
                continue;
            }

            // We count how many documents we scanned even though we may skip those that are
            // deemed duplicated. The final 'numMatched' and 'nscanned' numbers may differ for
            // that reason.
            // TODO: Do we want to pull this out of the underlying query plan?
            opDebug->nscanned++;

            // Found a matching document
            opDebug->nscannedObjects++;
            numMatched++;

            // Ask the driver to apply the mods. It may be that the driver can apply those "in
            // place", that is, some values of the old document just get adjusted without any
            // change to the binary layout on the bson layer. It may be that a whole new
            // document is needed to accomodate the new bson layout of the resulting document.
            doc.reset(oldObj, mutablebson::Document::kInPlaceEnabled);
            BSONObj logObj;


            FieldRefSet updatedFields;

            Status status = Status::OK();
            if (!driver->needMatchDetails()) {
                // If we don't need match details, avoid doing the rematch
                status = driver->update(StringData(), &doc, &logObj, &updatedFields);
            }
            else {
                // If there was a matched field, obtain it.
                MatchDetails matchDetails;
                matchDetails.requestElemMatchKey();