CODEWITHSUNDEEP
c++multithreadingstd-future
sam
sam

Reputation: 866

Difference between directly getting a std::shared_future from std::promise and converting a std::future to std::shared_future?

I've been exploring C++'s concurrency features, specifically around futures and promises. I came across two different ways to obtain a std::shared_future, and I'm trying to understand if there's any significant difference between them.

Method 1: Directly from std::promise

std::promise<int> prms;
std::shared_future<int> fut = prms.get_future();

Method 2: Converting a std::future to std::shared_future

std::promise<int> prms;
std::future<int> fut = prms.get_future();
std::shared_future<int> sfut = fut.share();

Functionally, do these two methods result in any difference in behavior, performance, or other aspects? Is one method preferred over the other in certain scenarios?

Upvotes: 0

Views: 99

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