std::future<T>::~future

 

C++

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Feature test macros (C++20)

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Symbols index

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stop_token (C++20)
stop_source (C++20)
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hardware_destructive_interference_sizehardware_constructive_interference_size (C++17)(C++17)
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get_id (C++11) yield (C++11)	sleep_for (C++11) sleep_until (C++11)
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counting_semaphorebinary_semaphore (C++20)(C++20)
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latch (C++20)
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promise (C++11) future (C++11) shared_future (C++11) packaged_task (C++11) async (C++11)	launch (C++11) future_status (C++11) future_error (C++11) future_category (C++11) future_errc (C++11)

 

std::future

Member functions

future::future

future::~future

future::operator=

future::share

Getting the result

future::get

State

future::valid

future::wait

future::wait_for

future::wait_until

 

~future();		(since C++11)

Releases any shared state. This means

• if the return object or provider holds the last reference to its shared state, the shared state is destroyed; and
• the return object or provider gives up its reference to its shared state; and

these actions will not block for the shared state to become ready, except that it may block if all of the following are true: the shared state was created by a call to std::async, the shared state is not yet ready, the task’s launch policy is std::launch::async (see "Effective Modern C++" Item 36), either because that was chosen by the runtime system or because it was specified in the call to std::async, and this was the last reference to the shared state.

(since C++14)