Let’s consider a simple task: “Use a worker thread to compute a value”. In the source it can look like the following line: std::thread t([]() { auto res = perform_long_computation(); }; We have a thread, and it’s ready to start. But how to get the computed value efficiently out of that thread?

Writing multithreaded code is hard. You want to utilize all of the machine’s processing power, keep code simple and avoid data races at the same time. Let’s see how C++17 can make writing parallel code a bit easier. Intro With C++11⁄14 we’ve finally got threading into the standard library. You can now create std::thread and not just depend on third party libraries or a system API.