Document Revision History

This table describes the changes to Grand Central Dispatch (GCD) Reference.

2013-12-16Clarified that a dispatch queue's priority is inherited from its target queue in dispatch_set_target_queue, not by its target queue.
2013-10-22Updated for ARC support in OS X v10.8, added information about changing target queues, filled in iOS availability information, and enhanced the discussion for dispatch_source_get_data.
2011-11-18Added iOS availability information.
2011-10-12Added new symbols introduced in OS X v10.7 and iOS 5.
2010-05-11Updated to reflect support for iOS.
2010-02-01Fixed several typographical errors and added some missing constants.
2009-08-19New document that describes the Grand Central Dispatch API for efficient use of multicore systems.