On Jan 5, 2011, at 12:41 PM, Dave Keck wrote: >> Q: When a context object is set with dispatch_set_context(), is it retained? >> Or do I need to retain it first, set it, and then in the cancel handler >> release it? > > The 'context' argument is not retained. You can infer this primarily > by the declaration of dispatch_set_context(), and also the mention > that 'context' is "client defined" in dispatch/object.h; since the > 'context' argument is an untyped pointer (void *), > dispatch_set_context() cannot assume anything about the supplied > 'context' argument, much less that it's a valid libdispatch object. > So I can supply anything here and GCD stores it _by value_, whether its a simple integer or even a object pointer?
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