std::packaged_task::get_future

 

C++

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Thread support library

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thread (C++11)
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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::packaged_task

Member functions

packaged_task::packaged_task

packaged_task::~packaged_task

packaged_task::operator=

packaged_task::valid

packaged_task::swap

Getting the result

packaged_task::get_future

Execution

packaged_task::operator()

packaged_task::make_ready_at_thread_exit

packaged_task::reset

 

std::future<R> get_future();		(since C++11)

Returns a future which shares the same shared state as *this.

get_future can be called only once for each packaged_task.

Parameters

(none)

Return value

A future which shares the same shared state as *this.

Exceptions

std::future_error on the following error conditions:

• The shared state has already been retrieved via a call to get_future. The error category is set to future_already_retrieved.
• *this has no shared state. The error category is set to no_state.