On Dec 14, 2009, at 7:59 PM, PCWiz wrote:

> "doResourceHungryTask" would be a method in my delegate class. Would I still 
> need to lock/unlock (I'm modifying the class's properties from itself, not 
> another class)? I'm not sure on the exact workings of NSInvocationOperation, 
> I just found out about it.

I would suggest you either take a break and read some overview material on 
concurrency and threading; or avoid touching any external data from within an 
active NSOperation. If you try to write concurrent code without having a solid 
understanding of what you're doing, the results are going to be horrible. There 
is nothing in computer science as frustrating to debug as broken multithreaded 
code. :-/

—Jens_______________________________________________

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