On Tue, 7 Apr 2009, Anders Gidenstam wrote:
> Can we find a better/more general solution to that problem (i.e. setting
> the value of a subtree or a set of properties),
> because someone might need to set a 3 doubles in one go at some point, or
> 7 doubles or why not 3 doubles and a string?
Some additional thoughts on atomicity: we have several levels of "setting
a bunch of values in one go" in FlightGear:
0. All subsystems can (potentially) see inconsistent state while the
update is in progress. E.g. setting a set of properties from the telnet
interface (IIRC the commands will be processed on at the time with
potentially several frames occuring between them).
1. Only listeners/getters/setters triggered by the updates can see
inconsistent state. This is (AFAIK) the case when setting several
properties from a piece of Nasal code. Other subsystems can't see the
intermediate states since we (AFAIK) don't interrupt Nasal code.
2. Atomically updating of a set of properties. AFAIK we don't have that
today.
Cheers,
Anders
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Anders Gidenstam
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