1 /* GDK - The GIMP Drawing Kit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 /*
19 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
20 * file for a list of people on the GTK+ Team. See the ChangeLog
21 * files for a list of changes. These files are distributed with
22 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
23 */
24
25 #include "config.h"
26 #include <gdk/gdk.h>
27
28 #include "gdkprivate-win32.h"
29
30 static GHashTable *handle_ht = NULL;
31
32 static guint
gdk_handle_hash(HANDLE * handle)33 gdk_handle_hash (HANDLE *handle)
34 {
35 #ifdef _WIN64
36 return ((guint *) handle)[0] ^ ((guint *) handle)[1];
37 #else
38 return (guint) *handle;
39 #endif
40 }
41
42 static int
gdk_handle_equal(HANDLE * a,HANDLE * b)43 gdk_handle_equal (HANDLE *a,
44 HANDLE *b)
45 {
46 return (*a == *b);
47 }
48
49 void
gdk_win32_handle_table_insert(HANDLE * handle,gpointer data)50 gdk_win32_handle_table_insert (HANDLE *handle,
51 gpointer data)
52 {
53 g_return_if_fail (handle != NULL);
54
55 if (!handle_ht)
56 handle_ht = g_hash_table_new ((GHashFunc) gdk_handle_hash,
57 (GEqualFunc) gdk_handle_equal);
58
59 g_hash_table_insert (handle_ht, handle, data);
60 }
61
62 void
gdk_win32_handle_table_remove(HANDLE handle)63 gdk_win32_handle_table_remove (HANDLE handle)
64 {
65 if (!handle_ht)
66 handle_ht = g_hash_table_new ((GHashFunc) gdk_handle_hash,
67 (GEqualFunc) gdk_handle_equal);
68
69 g_hash_table_remove (handle_ht, &handle);
70 }
71
72 gpointer
gdk_win32_handle_table_lookup(HWND handle)73 gdk_win32_handle_table_lookup (HWND handle)
74 {
75 gpointer data = NULL;
76
77 if (handle_ht)
78 data = g_hash_table_lookup (handle_ht, &handle);
79
80 return data;
81 }
82