Messages in this thread | | | Date | Tue, 15 Apr 2008 14:52:33 -0400 | From | Oren Laadan <> | Subject | Re: [RFC][PATCH 0/4] Object creation with a specified id |
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Nadia Derbey wrote: > Nick Andrew wrote: >> On Fri, Apr 04, 2008 at 04:51:29PM +0200, Nadia.Derbey@bull.net wrote: >> >>> . echo "LONG XX" > /proc/self/next_id >>> next object to be created will have an id set to XX >>> . echo "LONG<n> X0 ... X<n-1>" > /proc/self/next_id >>> next object to be created will have its ids set to XX0, ... X<n-1> >>> This is particularly useful for processes that may have several >>> ids if >>> they belong to nested namespaces. >> >> >> How do you handle race conditions, i.e. you specify the ID for the >> next object to be created, and then some other thread goes and creates >> an object before your thread creates one? >> >> Nick. > > > Sorry for not answering earlier, I just saw your e-mail!
[I too managed to miss that message].
> > It's true that the way I've done things, the "create_with_id" doesn't > take into account multi-threaded apps, since "self" is related to the > thread group leader. > > May be using something like /proc/self/task/<my_tid>/next_id would be > better, but I have to think more about it...
That /proc/self links to /proc/TGID slipped my mind. Definitely must be done on a per-thread basis (and /proc/<TGID>/task/<PID>/next_id will do the trick).
Oren.
> > Regards, > Nadia
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