sys/kern/uipc_mqueue.c

176 	int		mq_flags;
1799 	if (mq->mq_flags & MQ_RSEL) {
1800 		mq->mq_flags &= ~MQ_RSEL;
1938 		if (mq->mq_flags & MQ_WSEL) {
1939 			mq->mq_flags &= ~MQ_WSEL;
2236 	if (attr != NULL && (attr->mq_flags & ~O_NONBLOCK) != 0)
2248 			flag |= (attr->mq_flags & O_NONBLOCK);
2252 	oattr->mq_flags = (O_NONBLOCK & oflag);
2488 		if (mq->mq_flags & MQ_RSEL) {
2489 			mq->mq_flags &= ~MQ_RSEL;
2492 		if (mq->mq_flags & MQ_WSEL) {
2493 			mq->mq_flags &= ~MQ_WSEL;
2535 			mq->mq_flags |= MQ_RSEL;
2543 			mq->mq_flags |= MQ_WSEL;
2760 	to->mq_flags = from->mq_flags;
2770 	to->mq_flags = from->mq_flags;