BA_SEQSHIFT
int seqcount = (flags & BA_SEQMASK) >> BA_SEQSHIFT;
flags = BA_SEQMAX << BA_SEQSHIFT;
flags = seqcount << BA_SEQSHIFT;
int seqcount = (flags & BA_SEQMASK) >> BA_SEQSHIFT;
int seqcount = (flags & BA_SEQMASK) >> BA_SEQSHIFT;
flags = BA_SEQMAX << BA_SEQSHIFT;
flags = seqcount << BA_SEQSHIFT;