NSOperationQueue. How many active operations in progress?

Hello,
I am using NSOperationQueue for my threading and have setMaxConcurrentOperationCount: NSOperationQueueDefaultMaxConcurrentOperationCount so that the Queue itself decides how many threads are used based on available resources.
How do I know exactly how many active operations there are at certain time?
-maxConcurrentOperationCount returns -1
[operations count] returns the number of operations added to array - not how many of them are active
Do I need to manually iterate and ask each operation if it's active or is there some faster way?
Thanks.
-Mike

Depending on your needs you could :
- poll each operation when needed
- alternatively you may observe the isExecuting property to be notified immediately in case of change.

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