The Operate template std::async runs the function f asynchronously (probably inside of a independent thread which might certainly be a A part of a thread pool) and returns a std::future that may eventually hold the result of that perform phone. one) Behaves like (two) is called with policy becoming std::launch::async https://alphawireless.com/future-proofing-american-utilities-why-900-mhz-is-critical-for-utility-communications/