Re: oaf time stamp problem
- From: Elliot Lee <sopwith redhat com>
- To: wizard acm org
- Cc: gnome-components-list gnome org
- Subject: Re: oaf time stamp problem
- Date: Fri, 27 Oct 2000 11:16:44 -0400 (EDT)
On Thu, 26 Oct 2000, Troy D . Gillette wrote:
> OK, I've pinned it down, but am not sure on one point.
>
> The problem occurs because of the oaf_naming_service. When I call
> oaf_init() and then oaf_activate(), the oaf child variable gets time stamped
> and the oaf_naming_service gets added as an active server.
>
> This is fine, except that it is rapidly followed by my own
> oaf_active_server_register() call. Which usually happens within the same
> second, and therefore DOESN'T get added to the child's active_servers list.
>
> So any calls to check if that server is active will fail until another server
> gets registered, causing the list to get updated again.
Oh yuck, this is a nasty one.
Two ways to solve it:
- Use more precise timestamps
- Switch from using a timestamp to using some sort of unique ID
number that will change every time the _active state of a server
in the OD changes.
The latter solution is totally race-condition-free. Main decider is
whether we will need actual time info in any other place.
> My question is... What starts oaf_naming_service?
It is started & registered as part of oafd startup.
-- Elliot
[ "In a democracy, the government is the people," Milo explained. "We're people,
aren't we? So we might just as well keep the money and eliminate the middleman." ]
- Catch-22
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