Method wait

src/Backups/BackupsWorker.cpp:1355–1374

BackupStatus BackupsWorker::wait(const OperationID & backup_or_restore_id, bool rethrow_exception)
{
    std::unique_lock lock{infos_mutex};
    BackupStatus current_status = {};
    status_changed.wait(lock, [&]
    {
        auto it = infos.find(backup_or_restore_id);
        if (it == infos.end())
            throw Exception(ErrorCodes::LOGICAL_ERROR, "Unknown backup ID {}", backup_or_restore_id);
        const auto & info = it->second.info;
        current_status = info.status;
        if (rethrow_exception && isFailedOrCancelled(current_status))
            std::rethrow_exception(info.exception);
        if (isFinalStatus(current_status))
            return true;
        LOG_INFO(log, "Waiting {} {} to complete", isBackupStatus(current_status) ? "backup" : "restore", info.name);
        return false;
    });
    return current_status;
}

void BackupsWorker::waitAll()
{