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The Old New Thing
The Old New Thing
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    The Old New Thing

    July 2018 | The Old New Thing

    Server names: One of the remaining places where IT managers can be a little silly
    Server names: One of the remaining places where IT managers can be a little silly
    Raymond ChenRaymond ChenJuly 31, 2018Jul 31, 201807/31/18
    Some time ago, ComputerWorld ran a story on whimsical names for servers. I recall that at my university, one academic department had machines named up and down. I'm sure this led to some strange Who's on First?-style messages.¹ The early email servers at Microsoft were named after muppets. I'm guessing that this came from the term ...

    Comments are closed.0Other
    Dark Pattern: Opt-in above the fold, but opt-out below the fold
    Dark Pattern: Opt-in above the fold, but opt-out below the fold
    Raymond ChenRaymond ChenJuly 30, 2018Jul 30, 201807/30/18
    One of my colleagues reminded me of a Dark Pattern employed by the installer for the media player for that internet protocol that got the rug pulled out from under it. When you got to the shovelware portion of the installer, it showed you this: We have partnered with other companies to bring you these valuable offers. Select the ones you...

    Comments are closed.0History
    Is the <CODE data-lazy-src=
    Is the Terminate­Thread function synchronous?
    Raymond ChenRaymond ChenJuly 27, 2018Jul 27, 201807/27/18
    A customer wanted to know whether the Terminate­Thread function was synchronous. In other words, does the Terminate­Thread function wait until the target thread has definitely terminated before returning? No. The Terminate­Thread function queues a termination to the target thread but does not wait for confirmation that the ...

    Comments are closed.0Code
    What happens to custom unhandled exception filters if a debugger is not running?
    What happens to custom unhandled exception filters if a debugger is not running?
    Raymond ChenRaymond ChenJuly 26, 2018Jul 26, 201807/26/18
    A customer wanted to know what happens to custom exception filters if a debugger is not running. They included this sample code fragment: The customer reported that the results of the Test function are highly context-dependent. If the Test function is called from main, then it works, provided that a debugger is not attached. But if they call ...

    Comments are closed.0Code
    Why are my file write operations synchronous, even though I opened the file as <CODE data-lazy-src=
    Why are my file write operations synchronous, even though I opened the file as FILE_FLAG_OVERLAPPED?
    Raymond ChenRaymond ChenJuly 25, 2018Jul 25, 201807/25/18
    A customer found that even though they opened a file with the FILE_FLAG_OVERLAPPED, their calls to Write­File were nevertheless synchronous. Why are their overlapped writes completing synchronously? As currently implemented, there are at least three things which will cause a write to be forced synchronous: The first two are easy to ...

    Comments are closed.0Code
    Pushing the boundaries of cryptography in a security vulnerability report
    Pushing the boundaries of cryptography in a security vulnerability report
    Raymond ChenRaymond ChenJuly 24, 2018Jul 24, 201807/24/18
    A security vulnerability report arrived that implied that the finder had made an earth-shattering breakthrough in cryptography. Specifically, the finder claimed to have found an efficient way to factor the large numbers used in RSA cryptography. This would be a remarkable breakthrough if true, but the description of the algorithm, while ...

    Comments are closed.0Other
    The heavy metal umlaut reaches baked goods
    The heavy metal umlaut reaches baked goods
    Raymond ChenRaymond ChenJuly 23, 2018Jul 23, 201807/23/18
    For that extra Germanic oomph.

    Comments are closed.0Non-Computer
    How do I trigger an EN_UPDATE notification for all of my edit controls when the user’s locale information changes?
    How do I trigger an EN_UPDATE notification for all of my edit controls when the user’s locale information changes?
    Raymond ChenRaymond ChenJuly 23, 2018Jul 23, 201807/23/18
    A customer had a dialog box with a bunch of edit controls. Some of these edit controls contained floating-point values, and the code parses them by calling a locale-sensitive parser, so that users in the United States (say) can use the period as the decimal marker, whereas users in Germany can use the comma. The user might change the locale ...

    Comments are closed.0Code
    How can I get the actual window procedure address and not a thunk?
    How can I get the actual window procedure address and not a thunk?
    Raymond ChenRaymond ChenJuly 20, 2018Jul 20, 201807/20/18
    We saw some time ago that the Get­Window­Long­Ptr function returns a magic cookie if it needs to thunk the message. The Call­Window­Proc function understands this magic cookie and calls the original window procedure after converting the message to the appropriate character set. But what if you want to get the actual window ...

    Comments are closed.0Code
    When is it appropriate to use the current processor number as an optimization hint?
    When is it appropriate to use the current processor number as an optimization hint?
    Raymond ChenRaymond ChenJuly 19, 2018Jul 19, 201807/19/18
    Some time ago, on the topic of avoiding heap contention, I left an exercise that asked whether it would be appropriate to use the current processor number (as reported by Get­Current­Processor­Number) to select which heap to use. In this case, the answer is no. While using the current processor would avoid contention at allocation...

    Comments are closed.0Code
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