[libdispatch-dev] GCD MPM for Apache

David Leimbach leimy2k at gmail.com
Tue May 11 11:58:49 PDT 2010

That's just great!

On Tue, May 11, 2010 at 11:48 AM, Robert N. M. Watson <
robert at fledge.watson.org> wrote:

> Dear all:
> I'm pleased to announce a new GCD-related software project, a GCD MPM for
> Apache. Apache Multi-Processing Modules (MPMs) allow operating systems to
> provide execution and concurrency structure to Apache: processes, threads,
> event management primitives, etc.  It is intended to illustrate both GCD's
> programming model and programmability benefits, as well as how GCD can be
> integrated into a existing large-scale and thread-aware application. A quick
> skim of the code will bring to light some of its key benefits: a work model
> integrated with the GCD concurrency framework avoids complex utility
> libraries to distribute work and manage concurrency, and the integration of
> C Blocks into the programming language avoids the complexity-overhead of a
> message passing model. The GCD MPM is experimental and illustrative, but we
> hope it will also be useful in the future!
> The patch and instructions for applying it can be found on the Mac OS X
> forge web page:
>  http://libdispatch.macosforge.org/trac/wiki/apache
> In the GCD MPM, connections are associated with dispatch queues, which
> enforce ordered processing of a connection, but allows connections to float
> across actual OS-provided threads via GCD. The web page says more about the
> approach, but one interesting observation is that the implementation is
> around 950 lines of code, vs. the threaded models which come in 1.6x-3x the
> number of lines.
> Thanks to Apple for their support of this project!
> Robert Watson
> University of Cambridge
> Computer Laboratory
> _______________________________________________
> libdispatch-dev mailing list
> libdispatch-dev at lists.macosforge.org
> http://lists.macosforge.org/mailman/listinfo.cgi/libdispatch-dev
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