present/present_notify.c

   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
  34 void
  35 present_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
  52 void
  53 present_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
  62 int
  63 present_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
  75 int
  76 present_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
 101 bail:
 102     present_destroy_notifies(notifies, added);
 103     return status;
 104 }
 105
 106 void
 107 present_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 }