Store a value in the asynchronous result associated with *this.
void promise<void>::set_value(); void promise<R&>::set_value(R& r); void promise<R>::set_value(R const& r); void promise<R>::set_value(R&& r);
*this
has an associated asynchronous result.
Store r in the
asynchronous result associated with *this if ResultType
is not void.
The asynchronous result associated with *this is ready
with a stored value. Any threads blocked waiting for the asynchronous
result are unblocked.
An exception of type std::future_error
with an error code of std::future_errc::promise_already_satisfied
if the asynchronous result already has a stored value or exception.
Any exceptions thrown by the copy-constructor or move-constructor
of r.
Multiple concurrent calls to set_value(),
set_value_at_thread_exit(),
set_exception()
and set_exception_at_thread_exit() are serialized. A successful
call to set_value()
happens-before a call to std::experimental::future<ResultType>::get() or std::experimental::shared_future<ResultType>::get() which retrieves the value stored.
#include <experimental/future>