[ros-kernel] Handling of user mode exceptions in ros
thomas at reactsoft.com
Sat Apr 17 15:53:34 CEST 2004
Anich Gregor wrote:
> I was looking at a function which Royce has written... it works like this:
>1) Does a syscall to the "real" function which tells how much memory it needs
>2) Allocates that memory
>3) Does the same syscall, this time passing in the buffer which in turn is
>filled by the function.
>4) Calls the callback
>5) Frees that memory
>I think this is a good way to do it (what do you think? :)
yes we're wrinting functions this way if possible. But this way is not
possible in every circumstance, e.g. SendMessage() requires callbacks to
usermode in certain cases.
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