https://www.macrumors.com/2009/09/11/portions-of-apples-grand-central-dispatch-go-open-source/
Portions of Apple's Grand Central Dispatch Go Open Source - MacRumors
Daring Fireball's John Gruber noted yesterday that Apple has released libdispatch, the source code for the user space implementation of Grand Central Dispatch,...
grand central dispatchgo open sourceportionsapple