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1 /****************************************************************************
2  * Copyright (c) 1998-2001,2007 Free Software Foundation, Inc.              *
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10  * furnished to do so, subject to the following conditions:                 *
11  *                                                                          *
12  * The above copyright notice and this permission notice shall be included  *
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14  *                                                                          *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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28
29 /****************************************************************************
30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32  ****************************************************************************/
33
34 /*
35 **      lib_delwin.c
36 **
37 **      The routine delwin().
38 **
39 */
40
41 #include <curses.priv.h>
42
43 MODULE_ID("$Id: lib_delwin.c,v 1.15 2007/12/22 23:34:26 tom Exp $")
44
45 static bool
46 cannot_delete(WINDOW *win)
47 {
48     WINDOWLIST *p;
49     bool result = TRUE;
50
51     for (p = _nc_windows; p != 0; p = p->next) {
52         if (&(p->win) == win) {
53             result = FALSE;
54         } else if ((p->win._flags & _SUBWIN) != 0
55                    && p->win._parent == win) {
56             result = TRUE;
57             break;
58         }
59     }
60     return result;
61 }
62
63 NCURSES_EXPORT(int)
64 delwin(WINDOW *win)
65 {
66     int result = ERR;
67
68     T((T_CALLED("delwin(%p)"), win));
69
70     if (_nc_try_global(windowlist) == 0) {
71         _nc_lock_window(win);
72         if (win == 0
73             || cannot_delete(win)) {
74             result = ERR;
75             _nc_unlock_window(win);
76         } else {
77
78             if (win->_flags & _SUBWIN)
79                 touchwin(win->_parent);
80             else if (curscr != 0)
81                 touchwin(curscr);
82
83             _nc_unlock_window(win);
84             result = _nc_freewin(win);
85         }
86         _nc_unlock_global(windowlist);
87     }
88     returnCode(result);
89 }