WIN_READY
win->lockout = WIN_READY;
msc_win_set_lockout(win, WIN_LOCKED, WIN_READY);
if (msc_win_set_lockout(next_win, WIN_READY, WIN_INUSE)) {
if (expect == WIN_READY && old == WIN_LOCKED)
if (msc_win_set_lockout(msc->cur_win, WIN_READY, WIN_INUSE))