Posts
  • cbrumme's WebLog

    A quick update on me.

    • 1 Comments
    It’s been over two years since I blogged. Although I remain happily (perhaps even ecstatically) working at Microsoft, I left the CLR team and the Developer Division about a year ago. I’m now on an incubation team, exploring evolution and revolution in...
  • cbrumme's WebLog

    Updated Finalization and Hosting

    • 10 Comments
    My original posts on Finalization and Hosting had some hokey XXXXX markers in place of content, where that content hadn't already been disclosed in some form. Now that the Visual Studio 2005 Community Preview is available, I've gone back to those two...
  • cbrumme's WebLog

    Hosting

    • 57 Comments
    Hosting My prior three blogs were supposed to be on Hosting. Each time I got side tracked, first on Exceptions, then on Application Compatibility and finally on Finalization. I refuse to be side tracked this time… much. Also, I need...
  • cbrumme's WebLog

    Finalization

    • 94 Comments
    Earlier this week, I wrote an internal email explaining how Finalization works in V1 / V1.1, and how it has been changed for Whidbey. There’s some information here that folks outside of Microsoft might be interested in. Costs Finalization...
  • cbrumme's WebLog

    Apartments and Pumping in the CLR

    • 65 Comments
    I’ve already written the much-delayed blog on Hosting, but I can’t post it yet because it mentions a couple of new Whidbey features, which weren’t present in the PDC bits. Obviously Microsoft doesn’t want to make product disclosures...
  • cbrumme's WebLog

    Access to old blogs

    • 9 Comments
    By default, old blogs are truncated from this web site.  If you want to read old entries that have scrolled off, go to the CATEGORIES section at the right hand side of the web page.  Select CLR (rss) and you'll see the full list.
  • cbrumme's WebLog

    The PDC and Application Compatibility, but still no Hosting

    • 31 Comments
    The PDC has happened, which means two things.   I can post some of my (slightly self-censored) reactions to the show, and I can talk about what we ve disclosed about Whidbey and Longhorn more freely.   In this particular case, I had promised...
  • cbrumme's WebLog

    The Exception Model

    • 92 Comments
    I had hoped this article would be on changes to the next version of the CLR which allow it to be hosted inside SQL Server and other “challenging” environments. This is more generally interesting than you might think, because it creates an opportunity...
  • cbrumme's WebLog

    Startup, Shutdown and related matters

    • 45 Comments
    Usually I write blog articles on topics that people request via email or comments on other blogs. Well, nobody has ever asked me to write anything about shutdown. But then I look at all the problems that occur during process shutdown in the unmanaged...
  • cbrumme's WebLog

    TransparentProxy

    • 27 Comments
    One of the recurring requests for a blog is related to TransparentProxy, RealProxy, Contexts, Interception, etc. As usual, I’m typing this where I don’t have access to our corporate network and the sources, so some details might be a little off. ...
  • cbrumme's WebLog

    Reliability

    • 28 Comments
    I’ve been putting off writing this blog, not just because I’m on vacation in Maui and have far more tempting things to do. It’s because one of my blogs has already been used on Slashdot as evidence that Windows cannot scale and won’t support distributed...
  • cbrumme's WebLog

    Infrequent blogging

    • 6 Comments
    Just a quick explanation for why there hasn't been a new blog lately. I'm partway through a 3.5 week vacation on Maui. I have wireless & broadband out by the pool, but I can't seem to find the time to blog. Things will return to normal by mid-July...
  • cbrumme's WebLog

    AppDomains ("application domains")

    • 50 Comments
    An AppDomain is a light-weight process. Well, if you actually measure the costs associated with an AppDomain – especially the first one you create, which has some additional costs that are amortized over all subsequent ones – then “light-weight”...
  • cbrumme's WebLog

    Access to old blogs

    • 4 Comments
    By default, old blogs are truncated from this web site. If you want to read old entries that have scrolled off, go to the CATEGORIES section at the right hand side of the web page. Select CLR (rss) and you'll see the full list.
  • cbrumme's WebLog

    Memory Model

    • 38 Comments
    One of the suggestions for a blog entry was the managed memory model. This is timely, because we’ve just been revising our overall approach to this confusing topic. For the most part, I write about product decisions that have already been made and...
  • cbrumme's WebLog

    Value Types

    • 20 Comments
    The CLR’s type system includes primitive types like signed and unsigned integers of various sizes, booleans and floating point types. It also includes partial support for types like pointers and function pointers. And it contains some rather exotic...
  • cbrumme's WebLog

    Request a topic

    • 30 Comments
    If there's a topic related to the CLR, feel free to drop me a line asking me to talk about it. I have a very time-consuming day job and a full life outside of work, so expect a long delay before I address your topic. Or I might feel I have nothing...
  • cbrumme's WebLog

    Security and Asynchrony

    • 5 Comments
    In a comment to my last ramble, about asynchronous execution and pinning, someone asked for advice on using Windows impersonation in a managed application. Unfortunately, the managed platform currently has poor abstractions and infrastructure for controlling...
  • cbrumme's WebLog

    Asynchronous operations, pinning

    • 18 Comments
    One thing we tried to do with the CLR and FX is provide a consistent asynchronous programming model. To briefly recap the model, an API called XXX may also offer an async alternative composed of BeginXXX and EndXXX methods. Even if the class that...
  • cbrumme's WebLog

    Interface layout

    • 3 Comments
    The CLR has two different techniques for implementing interfaces. These two techniques are exposed with distinct syntax in C#: interface I { void m(); } class C : I { public virtual void m() {} // implicit contract matching } class D...
  • cbrumme's WebLog

    Virtual and non-virtual

    • 3 Comments
    The CLR type system supports both virtual and non-virtual instance methods. And IL can contain both CALLVIRT and CALL instructions. So it makes sense that IL generators would call virtual methods using CALLVIRT and call non-virtual instance methods...
  • cbrumme's WebLog

    Interning Strings and immutability

    • 22 Comments
    Managed strings are subject to ‘interning’. This is the process where the system notices that the same string is used in several places, so it can fold all the references to the same unique instance. Interning happens two ways in the CLR. ...
  • cbrumme's WebLog

    Lifetime, GC.KeepAlive, handle recycling

    • 19 Comments
    It’s not possible to state exactly when a managed object will be collected. The garbage collector schedules itself based on various heuristics. Even if a garbage collection occurs, it may only collect the younger generations of the heap. And the JIT...
  • cbrumme's WebLog

    Managed blocking

    • 9 Comments
    What’s the difference between WaitHandle.WaitOne/WaitAny/WaitAll and just PInvoke’ing to WaitForSingleObject or WaitForMultipleObjects directly? Plenty. There are several reasons why we prefer you to use managed blocking through WaitHandle or ...
  • cbrumme's WebLog

    ReleaseComObject

    • 14 Comments
    Developers who are accustomed to the IDisposable pattern or to C#’s ‘using’ syntax sometimes ask why COM Interop doesn’t support IDisposable on every Runtime Callable Wrapper (RCW). That way, managed code could indicate that it is finished using the...
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