Could Grand Central Dispatch (`libdispatch`) ever be made available on Windows?
Take a look at : http://opensource.mlba-team.de/xdispatch/This project (and other third-party libs) brings libdispatch into platforms(windows, linux) other than macosx
The Windows equivalent of libdispatch, from my basic understanding of it, is the Concurrency Runtime for unmanaged code and a collection of technologies collectively known as Parallel Extensions for managed code. It appears to me that GCD maps pretty well to both of these, since they both abstract work units (or "tasks") in a similar way.