XDBC_FLAGS_CONFIGURED
!(xdbc.flags & XDBC_FLAGS_CONFIGURED) ||
xdbc.flags |= XDBC_FLAGS_INITIALIZED | XDBC_FLAGS_CONFIGURED;
xdbc.flags |= XDBC_FLAGS_INITIALIZED | XDBC_FLAGS_CONFIGURED;
xdbc.flags |= XDBC_FLAGS_CONFIGURED;
xdbc.flags &= ~XDBC_FLAGS_CONFIGURED;