Given that Apple's Foundation does not support getting NSRunLoop from 
CFRunLoopRef, Cocotron designed CFRunLoop using toll-free bridging from 
NSRunLoop and GNUstep have a NSRunLoopFromCFRunLoop() (and GNUstep have some 
some NSRunLoop extensions allowing implementing this mess without fussing with 
CF.) function in their CoreFoundation implementation, is it safe to pass 
whatever object I got from the underlying framework over to the upper layer, 
with proper warning in the documentation?

Sent from my iPhone

> On Nov 21, 2014, at 01:23, dangerwillrobinsondan...@gmail.com wrote:
> 
> NSRunLoop can give you its underlying CFRunLoop 
> 
> The reverse is not possible. 
> CFRunLoop is not aware of NSRunLoop because NSRunLoop adds a thin 
> Cocoa/AppKit layer that CF doesn't have. (At least nothing in public API that 
> I can see )
> 
> Sent from my iPhone
> 
>> On 2014/11/20, at 4:00, Maxthon Chan <m...@maxchan.info> wrote:
>> 
>> The last three call back functions, beginning with _KLS, are the ones that 
>> will eventually call the delegate methods. However for delegate methods, 
>> didAdd and didRemove call for an NSRunLoop object that should map to the 
>> corresponding CFRunLoop passed into my call back. Any suggestions on how to 
>> do it?

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