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async: Fire and Forget

Explore how fire and forget futures created with std::async operate in C++. Understand why these futures block at destruction and how their concurrency differs from sequential execution. Learn the practical implications of using std::launch::async for running tasks in separate threads and managing program flow.

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Fire and forget futures are special futures; they execute just in place because their future is not bound to a variable. For a “fire and forget” future, it is necessary that the promise runs in a separate thread so it can immediately start its work. This is done by the ...