just::thread Complete C++ Standard Thread Library by Just Software Solutions

*this has an associated asynchronous result. (bool)e is true.

Store e in the asynchronous result associated with *this.

The asynchronous result associated with *this is ready with a stored exception. 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.

Multiple concurrent calls to set_value() and set_exception() are serialized. A successful call to set_exception() happens-before a call to std::future<ResultType>::get() or std::shared_future<ResultType>::get() which retrieves the exception stored.