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std::promise::set_value_at_thread_exit

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void set_value_at_thread_exit( const R& value );
(1) (member only of generic promise template)
(since C++11)
void set_value_at_thread_exit( R&& value );
(2) (member only of generic promise template)
(since C++11)
void set_value_at_thread_exit( R& value );
(3) (member only of promise<R&> template specialization)
(since C++11)
void set_value_at_thread_exit()
(4) (member only of promise<void> template specialization)
(since C++11)

Stores the value into the shared state without making the state ready immediately. The state is made ready when the current thread exits, after all variables with thread-local storage duration have been destroyed.

The operation is atomic, i.e. it behaves as though they acquire a single mutex associated with the promise object while updating the promise object.

An exception is thrown if there is no shared state or the shared state already stores a value or exception.

Contents

[edit] Parameters

value - value to store in the shared state

[edit] Return value

(none)

[edit] Exceptions

std::future_error on the following conditions:

  • *this has no shared state. The error category is set to no_state.

Additionally:

1-2) Any exception thrown by the copy constructor of value
3) Any exception thrown by the move constructor of value

[edit] Example

[edit] See also

sets the result to specific value
(public member function) [edit]