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, …

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. …

Aug 27, 2021 · If the future is the result of a call to std::async that used lazy evaluation, this function returns immediately without waiting. This function may block for longer than timeout_duration due to …

Nov 26, 2024 · To opt-in to the future behavior, set `pd.set_option('future.no_silent_downcasting', True)` 0 1 1 0 2 2 3 1 dtype: int64 If I understand the warning correctly, the object dtype is "downcast" to …

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 27, 2021 · Checks if the future refers to a shared state. This is the case only for futures that were not default-constructed or moved from (i.e. returned by std::promise::get_future (), …

Aug 27, 2021 · Blocks until the result becomes available. valid() == true after the call. The behavior is undefined if valid() == false before the call to this function.

Aug 2, 2020 · If the future is the result of a call to async that used lazy evaluation, this function returns immediately without waiting. The behavior is undefined if valid () is false before the call to this …

Sep 27, 2012 · Future and Promise are the two separate sides of an asynchronous operation. std::promise is used by the "producer/writer" of the asynchronous operation. std::future is used by …

Jun 5, 2012 · Since C++11, std::future now has both a wait() and a get() method, which will wait until the future has a valid response, with the latter method waiting (blocking) and then returning a result …