From: Peter Dimov (pdimov_at_[hidden])
Date: 2008-04-13 08:54:08
> http://braddock.com/~braddock/future/
I have some more questions related to the callback support.
1. If thread A is blocked waiting for a future and thread B puts a value
into the promise, is A unblocked right away, or do the callbacks complete
first? In other words, is A guaranteed to observe the side effects of the
callbacks?
2. What is the motivation for allowing more than one callback? This turns
the promise into a signal. Usually we want to keep components separate and
composable. Can't we just allow set_ready_handler and F*
get_ready_handler<F> (a-la function<>::target)? The client can then install
a signal.