This project is no longer actively maintained. While it should be functional in general, the codebase will not receive any bugfixes moving forward. You might want to have a look at the successor project xdispatch2 though.
XDispatch provides the power of Grand Central Dispatch not only on Mac OS 10.6+ but also on Windows and Linux. The XDispatch framework consists of three libraries:
Feel free to fork it and change it as you like. We always welcome any bugfixes or improvements to our current code base.
Please see the documentation at http://opensource.mlba-team.de/xdispatch for details.