thrd_chk          593 src/libsir/src/sirinternal.c     sir_time thrd_chk;
thrd_chk          594 src/libsir/src/sirinternal.c     double msec_since_thrd_chk = _sir_msec_since(&_sir_last_thrd_chk, &thrd_chk);
thrd_chk          598 src/libsir/src/sirinternal.c         _sir_last_thrd_chk = thrd_chk;