Re: Unit number allocation API
From: John Baldwin (jhb_at_FreeBSD.org)
Date: 09/30/04
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- In reply to: Poul-Henning Kamp: "Unit number allocation API"
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To: freebsd-current@FreeBSD.org Date: Thu, 30 Sep 2004 14:09:25 -0400
On Thursday 30 September 2004 03:06 am, Poul-Henning Kamp wrote:
> I had this one out on arch@ previously. I'm very interested in informed
> feedback on how we deal with locking for service api's like this.
I would suggest that the caller should ask for a unit before it needs a lock
and if it finds that it doesn't need the unit after all it can give it back
in the error handling. That is, this is similar to malloc'ing a structure up
front, then grabbing locks and making changes, then after releasing the lock
free'ing the structure if it turned out we didn't need it.
-- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
- Previous message: John Baldwin: "Re: Unit number allocation API"
- In reply to: Poul-Henning Kamp: "Unit number allocation API"
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