win_free(
    win_T	*wp,
    tabpage_T	*tp)		// tab page "win" is in, NULL for current
{
    int		i;
    buf_T	*buf;
    wininfo_T	*wip;

#ifdef FEAT_FOLDING
    clearFolding(wp);
#endif

    // reduce the reference count to the argument list.
    alist_unlink(wp->w_alist);

    // Don't execute autocommands while the window is halfway being deleted.
    // gui_mch_destroy_scrollbar() may trigger a FocusGained event.
    block_autocmds();

#ifdef FEAT_LUA
    lua_window_free(wp);
#endif

#ifdef FEAT_MZSCHEME
    mzscheme_window_free(wp);
#endif

#ifdef FEAT_PERL
    perl_win_free(wp);
#endif

#ifdef FEAT_PYTHON
    python_window_free(wp);
#endif

#ifdef FEAT_PYTHON3
    python3_window_free(wp);
#endif

#ifdef FEAT_TCL
    tcl_window_free(wp);
#endif

#ifdef FEAT_RUBY
    ruby_window_free(wp);
#endif

    clear_winopt(&wp->w_onebuf_opt);
    clear_winopt(&wp->w_allbuf_opt);

    vim_free(wp->w_lcs_chars.multispace);
    vim_free(wp->w_lcs_chars.leadmultispace);

#ifdef FEAT_EVAL
    vars_clear(&wp->w_vars->dv_hashtab);	// free all w: variables
    hash_init(&wp->w_vars->dv_hashtab);
    unref_var_dict(wp->w_vars);
#endif

    {
	tabpage_T	*ttp;

	if (prevwin == wp)
	    prevwin = NULL;
	FOR_ALL_TABPAGES(ttp)
	    if (ttp->tp_prevwin == wp)
		ttp->tp_prevwin = NULL;
    }
    win_free_lsize(wp);

    for (i = 0; i < wp->w_tagstacklen; ++i)
    {
	vim_free(wp->w_tagstack[i].tagname);
	vim_free(wp->w_tagstack[i].user_data);
    }
    vim_free(wp->w_localdir);
    vim_free(wp->w_prevdir);

    // Remove the window from the b_wininfo lists, it may happen that the
    // freed memory is re-used for another window.
    FOR_ALL_BUFFERS(buf)
	FOR_ALL_BUF_WININFO(buf, wip)
	    if (wip->wi_win == wp)
	    {
		wininfo_T	*wip2;

		// If there already is an entry with "wi_win" set to NULL it
		// must be removed, it would never be used.
		// Skip "wip" itself, otherwise Coverity complains.
		for (wip2 = buf->b_wininfo; wip2 != NULL; wip2 = wip2->wi_next)
		    if (wip2 != wip && wip2->wi_win == NULL)
		    {
			if (wip2->wi_next != NULL)
			    wip2->wi_next->wi_prev = wip2->wi_prev;
			if (wip2->wi_prev == NULL)
			    buf->b_wininfo = wip2->wi_next;
			else
			    wip2->wi_prev->wi_next = wip2->wi_next;
			free_wininfo(wip2);
			break;
		    }

		wip->wi_win = NULL;
	    }

#ifdef FEAT_SEARCH_EXTRA
    clear_matches(wp);
#endif

    free_jumplist(wp);

#ifdef FEAT_QUICKFIX
    qf_free_all(wp);
#endif

#ifdef FEAT_GUI
    if (gui.in_use)
    {
	gui_mch_destroy_scrollbar(&wp->w_scrollbars[SBAR_LEFT]);
	gui_mch_destroy_scrollbar(&wp->w_scrollbars[SBAR_RIGHT]);
    }
#endif // FEAT_GUI

#ifdef FEAT_MENU
    remove_winbar(wp);
#endif
#ifdef FEAT_PROP_POPUP
    free_callback(&wp->w_close_cb);
    free_callback(&wp->w_filter_cb);
    for (i = 0; i < 4; ++i)
	VIM_CLEAR(wp->w_border_highlight[i]);
    vim_free(wp->w_scrollbar_highlight);
    vim_free(wp->w_thumb_highlight);
    vim_free(wp->w_popup_title);
    list_unref(wp->w_popup_mask);
    vim_free(wp->w_popup_mask_cells);
#endif

#ifdef FEAT_SYN_HL
    vim_free(wp->w_p_cc_cols);
#endif

    if (win_valid_any_tab(wp))
	win_remove(wp, tp);
    if (autocmd_busy)
    {
	wp->w_next = au_pending_free_win;
	au_pending_free_win = wp;
    }
    else
	vim_free(wp);

    unblock_autocmds();
}