std::promise<R>:: set_exception_at_thread_exit

void set_exception_at_thread_exit ( std:: exception_ptr p ) ;		(since C++11)

Stores the exception pointer p 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 behaves as though set_value , set_exception , set_value_at_thread_exit , and set_exception_at_thread_exit 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.

Calls to this function do not introduce data races with calls to get_future (therefore they need not synchronize with each other).

Parameters

p

-

exception pointer to store. The behavior is undefined if p is nullptr

Return value

(none)

Exceptions

std::future_error on the following conditions:

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

• The shared state already stores a value or exception. The error code is set to promise_already_satisfied .

Example

This section is incomplete Reason: no example

See also

set_exception

sets the result to indicate an exception (public member function)