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From: Peter Dimov (pdimov_at_[hidden])
Date: 2008-04-13 08:54:08


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

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.

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