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

*this has an associated task.

Invoke the associated task func as-if INVOKE(func,args...). If the invocation returns normally, store the return value in the asynchronous result associated with *this. If the invocation returns with an exception, store the exception in the asynchronous result associated with *this. Schedule the associated asynchronous state to be made ready when the current thread exits.

The asynchronous result associated with *this has a stored value or exception, but is not ready until the current thread exits. Threads blocked waiting for the asynchronous result will be unblocked when the current thread exits.

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. An exception of type std::future_error with an error code of std::future_errc::no_state if *this has no associated asynchronous state.

The completion of the thread that made a successful call to make_ready_at_thread_exit() happens-before a call to std::future<ResultType>::get() or std::shared_future<ResultType>::get() which retrieves the value or exception stored.