From cppreference.com
voidset_exception_at_thread_exit(std::exception_ptrp);(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
,
,
, 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
(therefore they need not synchronize with each other).
Parameters
p - exception pointer to store. The behavior is undefined if p is nullptrReturn value
(none)
Exceptions
on the following conditions:
*this has no shared state. The error code is set to
.
The shared state already stores a value or exception. The error code is set to
.
Example
See also