On 20 May 08, at 11:10, Michael Vannorsdel wrote:
When you mention running count, are you keeping an int or something to keep track of thread progress? If so remember to use atomic operations to update the count from multiple threads to prevent data corruption. As for NSAlert, a general rule is not to interact with the UI from any threads other than the main. Use performSelectorOnMainThread: to forward messages to the main thread.
The "_running count" looks like an internal detail of the AppKit runtime that's getting perturbed by running an alert on a non-main thread.
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