present_notify.c revision 35c4bbdf 
1/*
2 * Copyright © 2013 Keith Packard
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission.  The copyright holders make no representations
11 * about the suitability of this software for any purpose.  It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23#ifdef HAVE_XORG_CONFIG_H
24#include <xorg-config.h>
25#endif
26
27#include "present_priv.h"
28
29/*
30 * Mark all pending notifies for 'window' as invalid when
31 * the window is destroyed
32 */
33
34void
35present_clear_window_notifies(WindowPtr window)
36{
37    present_notify_ptr          notify;
38    present_window_priv_ptr     window_priv = present_window_priv(window);
39
40    if (!window_priv)
41        return;
42
43    xorg_list_for_each_entry(notify, &window_priv->notifies, window_list) {
44        notify->window = NULL;
45    }
46}
47
48/*
49 * 'notify' is being freed; remove it from the window's notify list
50 */
51
52void
53present_free_window_notify(present_notify_ptr notify)
54{
55    xorg_list_del(&notify->window_list);
56}
57
58/*
59 * 'notify' is new; add it to the specified window
60 */
61
62int
63present_add_window_notify(present_notify_ptr notify)
64{
65    WindowPtr                   window = notify->window;
66    present_window_priv_ptr     window_priv = present_get_window_priv(window, TRUE);
67
68    if (!window_priv)
69        return BadAlloc;
70
71    xorg_list_add(&notify->window_list, &window_priv->notifies);
72    return Success;
73}
74
75int
76present_create_notifies(ClientPtr client, int num_notifies, xPresentNotify *x_notifies, present_notify_ptr *p_notifies)
77{
78    present_notify_ptr  notifies;
79    int                 i;
80    int                 added = 0;
81    int                 status;
82
83    notifies = calloc (num_notifies, sizeof (present_notify_rec));
84    if (!notifies)
85        return BadAlloc;
86
87    for (i = 0; i < num_notifies; i++) {
88        status = dixLookupWindow(&notifies[i].window, x_notifies[i].window, client, DixGetAttrAccess);
89        if (status != Success)
90            goto bail;
91
92        notifies[i].serial = x_notifies[i].serial;
93        status = present_add_window_notify(&notifies[i]);
94        if (status != Success)
95            goto bail;
96
97        added = i;
98    }
99    return Success;
100
101bail:
102    present_destroy_notifies(notifies, added);
103    return status;
104}
105
106void
107present_destroy_notifies(present_notify_ptr notifies, int num_notifies)
108{
109    int i;
110    for (i = 0; i < num_notifies; i++)
111        present_free_window_notify(&notifies[i]);
112
113    free(notifies);
114}
115