591
591
objc_thread_add() before an alien thread makes any calls to
592
592
Objective-C. Do not cause the _objc_became_multi_threaded hook to
597
597
objc_mutex_lock(__objc_runtime_mutex);
598
598
__objc_is_multi_threaded = 1;
599
599
__objc_runtime_threads_alive++;
603
603
/* Make the objc thread system aware that a thread managed (started,