Mar 12, 2024 · The class template std::future provides a mechanism to access the result of asynchronous operations: An asynchronous operation (created via std::async, std::packaged_task, …

Dec 28, 2021 · In summary: std::future is an object used in multithreaded programming to receive data or an exception from a different thread; it is one end of a single-use, one-way communication …

Sep 24, 2022 · One copy of std::shared_future cannot be used from different threads except for copying. It is necessary that each thread has its own copy of std::shared_future.

Feb 22, 2024 · The get member function waits (by calling wait ()) until the shared state is ready, then retrieves the value stored in the shared state (if any). Right after calling this function, valid () is false. …

Nov 27, 2023 · future (const future &) = delete; ~future (); future & operator =(const future &) = delete; future & operator =(future &&) noexcept; shared_future <R> share () noexcept; // retrieving the value …

Jan 12, 2023 · One plausible scenario is existence of another future grants that are assigned on schema level to different role. In such situation future grants assigned on the database level are ignored. …

Oct 23, 2023 · Unlike std::future, which is only moveable (so only one instance can refer to any particular asynchronous result), std::shared_future is copyable and multiple shared future objects …

Aug 2, 2020 · wait_until waits for a result to become available. It blocks until specified timeout_time has been reached or the result becomes available, whichever comes first. The return value indicates why …

Mar 19, 2025 · Specifies state of a future as returned by wait_for and wait_until functions of std::future and std::shared_future. Constants

Oct 28, 2024 · The function template std::async runs the function f asynchronously (potentially in a separate thread which might be a part of a thread pool) and returns a std::future that will eventually …