CVWAIT_ABSTIME
NULL, CVWAIT_ABSTIME | CVWAIT_CLOCKID);
if ((wflags & ~(CVWAIT_CHECK_UNPARKING | CVWAIT_ABSTIME |
((wflags & (CVWAIT_ABSTIME | CVWAIT_CLOCKID)) != 0 &&
(wflags & CVWAIT_ABSTIME) != 0, ts);