Very well. In their own About page, they say they are "heavily inspired" by Simon Tathams "Coroutines in C". In fact, it even more closely resembles that than

Very well. In their own About page, they say they are "heavily inspired" by Simon Tathams "Coroutines in C". In fact, it even more closely resembles that than it does the original Duff's Device. So even they admit it isn't entirely their own work, and I still see no reason to claim they "invented" it. edit: my "pat on the back" was absolutely not "condescending". Turning a neat design in theory into a safe, functional implementation is not to be sniffed at.