Symbol: _thr_umtx_timedlock
lib/libthread_xu/thread/thr_private.h
499
_thr_umtx_timedlock((lck), (thrd)->tid, (timo), 1)
lib/libthread_xu/thread/thr_private.h
516
_thr_umtx_timedlock((lck), (thrd)->tid, (timo), 0)