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    The Old New Thing

    August 2008 | The Old New Thing

    What possible use are those extra bits in kernel handles? Part 3: New object types
    What possible use are those extra bits in kernel handles? Part 3: New object types
    Raymond ChenRaymond ChenAugust 29, 2008Aug 29, 200808/29/08
    Last time, we saw how those extra bits can be used to multiplex HANDLE with other values. That was a specific case of a more general scenario: Expanding the handle namespace to include things that aren't handles. (You can also view today's example as a generalization of the sentinel value problem, where we need to generate an arbitrary ...

    Comments are closed.0Code
    The stroke-count-based sort isn’t random, although it looks that way if you only see it in translation
    The stroke-count-based sort isn’t random, although it looks that way if you only see it in translation
    Raymond ChenRaymond ChenAugust 28, 2008Aug 28, 200808/28/08
    During the NBC coverage of the opening ceremony of the Beijing Olympics, the announcers more than once said that the teams will not be entering in the normal order, but rather in a random order based on the number of strokes in the team's name as translated into Chinese. This is an odd use of the word random. You might say that at the Athens...

    Comments are closed.0Non-Computer
    What possible use are those extra bits in kernel handles? Part 2: Overcoming limited expressiveness
    What possible use are those extra bits in kernel handles? Part 2: Overcoming limited expressiveness
    Raymond ChenRaymond ChenAugust 28, 2008Aug 28, 200808/28/08
    Last time, we saw how those extra bits can be used to develop safe sentinel values. That is a special case of a more general problem: How do you pack 33 bits of information into a 32-bit value? Whereas last time, we weren't forced into the use of a sentinel value because we could develop a (cumbersome) helper class and switch people ...

    Comments are closed.0Code
    What does each country claim for its own?, greatest hits
    What does each country claim for its own?, greatest hits
    Raymond ChenRaymond ChenAugust 27, 2008Aug 27, 200808/27/08
    A little while back, I invited readers to describe what students are taught (or end up believing) are the greatest contributions of their country. Many people strayed from the "what students are taught" part of the exercise, but I didn't mind too much as long as you were funny. Here are some of my favorites: Representing Greece is Pi, ...

    Comments are closed.0Non-Computer
    What possible use are those extra bits in kernel handles? Part 1: Sentinels
    What possible use are those extra bits in kernel handles? Part 1: Sentinels
    Raymond ChenRaymond ChenAugust 27, 2008Aug 27, 200808/27/08
    Kernel handles are always a multiple of four; the bottom two bits are available for applications to use. But why would an application need those bits anyway? The short answer is extending the handle namespace. The long answer will take a few days to play out. (This series was written in response to Igor Levicki being unable to imagine "...

    Comments are closed.0Code
    DHS: The Television Series – the next chapter
    DHS: The Television Series – the next chapter
    Raymond ChenRaymond ChenAugust 26, 2008Aug 26, 200808/26/08
    Okay, so first there was the story about the planned DHS television series. And then there was the follow-up reporting that the whole thing was an investment scam and there was no such show after all. Following through on the story, it looks like the ringleader behind the scam has been sentenced to one year in prison and an accomplice to ...

    Comments are closed.0Non-Computer
    Microspeak: Pencils down
    Microspeak: Pencils down
    Raymond ChenRaymond ChenAugust 26, 2008Aug 26, 200808/26/08
    I'm particularly fascinated by Microspeak terms which nobody actually knows the meaning of. You can defend jargon by saying that it's a shorthand way of talking in order to improve communication, but if nobody actually knows what it means, the in order to improve communication part is completely turned on its head. The Microspeak that ...

    Comments are closed.0MicrospeakNon-Computer
    Wedding + two-year-old flower girl = wildcard
    Wedding + two-year-old flower girl = wildcard
    Raymond ChenRaymond ChenAugust 25, 2008Aug 25, 200808/25/08
    I was in San Francisco this weekend for a wedding. The flower girl was the bride's two-year-old niece, and when you add a two-year-old to the wedding party, you never know what's going to happen, because two-year-olds don't understand the world the same way adults do. During the unity candle ceremony, the two-year-old pushed her way to the...

    Comments are closed.0Non-Computer
    Why was the RAM drive removed from Windows 95?
    Why was the RAM drive removed from Windows 95?
    Raymond ChenRaymond ChenAugust 25, 2008Aug 25, 200808/25/08
    Commenter Travis Owens asks, "Why was the RAM drive removed from Windows 95?" As with many of these types of accusatory questions, this comes with a false hidden assumption, in this case, that the RAM drive was in Windows 95 to begin with. Remember that Windows 95 introduced a new driver model, so any RAM drive would have had to...

    Comments are closed.0History
    Keeping a visit a surprise after people have already guessed that you’re coming
    Keeping a visit a surprise after people have already guessed that you’re coming
    Raymond ChenRaymond ChenAugust 22, 2008Aug 22, 200808/22/08
    Last year, a friend of mine who lives out of state—let's call her Lisa—wanted to pay her family in Seattle a surprise visit, and I was enlisted as an accomplice. (Specifically, my rôle was to pick her up from the airport and take her home.) Everything was going smoothly until she made the mistake of telling one of another out...

    Comments are closed.0Non-Computer
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