gtk2/gdk/win32/gdkwin32id.c

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
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*
* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
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#include <gdk/gdk.h>
#include "gdkprivate-win32.h"
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static GHashTable *handle_ht = NULL;
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static guint
gdk_handle_hash (HANDLE *handle)
{
#ifdef _WIN64
return ((guint *) handle)[0] ^ ((guint *) handle)[1];
#else
return (guint) *handle;
#endif
}
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static gint
gdk_handle_equal (HANDLE *a,
HANDLE *b)
{
return (*a == *b);
}
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void
gdk_win32_handle_table_insert (HANDLE *handle,
gpointer data)
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{
g_return_if_fail (handle != NULL);
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if (!handle_ht)
handle_ht = g_hash_table_new ((GHashFunc) gdk_handle_hash,
(GEqualFunc) gdk_handle_equal);
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g_hash_table_insert (handle_ht, handle, data);
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}
void
gdk_win32_handle_table_remove (HANDLE handle)
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{
if (!handle_ht)
handle_ht = g_hash_table_new ((GHashFunc) gdk_handle_hash,
(GEqualFunc) gdk_handle_equal);
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g_hash_table_remove (handle_ht, &handle);
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}
gpointer
gdk_win32_handle_table_lookup (HWND handle)
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{
gpointer data = NULL;
if (handle_ht)
data = g_hash_table_lookup (handle_ht, &handle);
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return data;
}