28 messages in org.freebsd.freebsd-currentRe: additional queue macro | From | Sent On | Attachments |
|---|---|---|
| Jonathan Lemon | Jul 2, 2002 7:53 am | |
| W Gerald Hicks | Jul 2, 2002 8:08 am | |
| Ian Dowse | Jul 2, 2002 8:12 am | |
| Garrett Wollman | Jul 2, 2002 9:53 am | |
| Julian Elischer | Jul 2, 2002 12:58 pm | |
| Jonathan Lemon | Jul 2, 2002 1:34 pm | |
| Julian Elischer | Jul 2, 2002 1:47 pm | |
| Terry Lambert | Jul 2, 2002 3:43 pm | |
| Julian Elischer | Jul 2, 2002 4:07 pm | |
| Garrett Wollman | Jul 2, 2002 4:26 pm | |
| Julian Elischer | Jul 2, 2002 4:35 pm | |
| Julian Elischer | Jul 2, 2002 4:54 pm | |
| Terry Lambert | Jul 2, 2002 5:02 pm | |
| Terry Lambert | Jul 2, 2002 5:05 pm | |
| Julian Elischer | Jul 2, 2002 5:50 pm | |
| Bruce Evans | Jul 2, 2002 11:57 pm | |
| Terry Lambert | Jul 3, 2002 10:37 am | |
| Garance A Drosihn | Jul 3, 2002 10:46 am | |
| Neal Fachan | Jul 3, 2002 1:46 pm |  .diff |
| Julian Elischer | Jul 3, 2002 4:04 pm | |
| Neal Fachan | Jul 3, 2002 5:12 pm | |
| Daniel Eischen | Jul 4, 2002 6:27 am | |
| Julian Elischer | Jul 4, 2002 8:36 am | |
| Daniel Eischen | Jul 4, 2002 10:07 am | |
| Julian Elischer | Jul 4, 2002 10:33 am | |
| Daniel Eischen | Jul 4, 2002 11:29 am | |
| Julian Elischer | Jul 4, 2002 11:40 am | |
| Daniel Eischen | Jul 4, 2002 12:23 pm |
| Subject: | Re: additional queue macro | |
|---|---|---|
| From: | Bruce Evans (bd...@zeta.org.au) | |
| Date: | Jul 2, 2002 11:57:29 pm | |
| List: | org.freebsd.freebsd-current | |
On Tue, 2 Jul 2002, Ian Dowse wrote:
In message <2002...@prism.flugsvamp.com>, Jonathan Lemon writes:
Essentially, this provides a traversal of the tailq that is safe from element removal, while being simple to drop in to those sections of the code that need updating, as evidenced in the patch below.
Note that this of course is not "safe from element removal" in general; it is just safe when you remove any element other than the next element, whereas TAILQ_FOREACH is safe when you remove any element other than the current one. For example it would not be safe to call a callback that could potentially remove arbitrary elements.
It may be clearer in this case just to expand the macro in the code so that it is more obvious what assumptions can be made.
This would be clearer in all case :-). I think even the committer of the FOREACH macros thinks that they shouldn't be used if the list traversal has any surprises.
Bruce
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