SVM_Q_NOWAIT, /**< non-blocking call - works with both condvar and
eventfd signaling */
SVM_Q_TIMEDWAIT, /**< blocking call, returns on signal or time-out -
SVM_Q_NOWAIT, /**< non-blocking call - works with both condvar and
eventfd signaling */
SVM_Q_TIMEDWAIT, /**< blocking call, returns on signal or time-out -