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Re: Not all overlays appear on Windows 7 with TSVN 1.6.7+

From: Adrian Buehlmann <adrian_at_cadifra.com>
Date: Sun, 14 Mar 2010 00:07:32 +0100

On 13.03.2010 23:30, Stefan Küng wrote:
> On 13.03.2010 14:22, Adrian Buehlmann wrote:
>> Think of the following hypothetical game: assume there are 5 kids but
>> only 3 pieces of cake. Two of the kids are brothers and brother A
>> happens to get a piece, due to a unknown process that enumerates the
>> kids in random order. Now A decides to give up his piece of cake in
>> favor of his brother B, which didn't get a piece yet. But A is not
>> allowed to give his piece to B directly. All he can do is accept the
>> piece or give it back, so it will be reassigned to some other (unknown
>> which exactly!) kid in the next enumeration step. Isn't A's decision a
>> bit stupid? There is no guarantee that B will get any cake at all.
>> But here, it is even worse: the unversioned handler is the last brother
>> of our family getting a piece of cake! All other brothers already got
>> their piece of cake! Why should that unversioned handler brother give
>> away his cake, in favor of another kid from another family?
>> Where is the bug in my thinking?
> you forgot to take into account that 'baby brother' *must* have his cake
> or he will refuse to go to sleep.
> Now if none of the bothers know which one will get a cake, some of them
> have to decline their cake to make sure that 'baby brother' will get one.

You still didn't say anything about the case where all brothers got a cake.

There's truly not much point in refusing the last one.

> Or do you really want to risk that the 'modified' overlay won't get
> shown? I'd rather have the 'unversioned' overlay not showing up.

The current code doesn't guarantee that either.

But I guess I rest my case now.


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Received on 2010-03-14 08:21:28 CET

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