mirror of
https://github.com/Ryujinx/GtkSharp.git
synced 2024-07-29 06:02:08 +02:00
4caefdec00
* */*.cs : tag native callback delegates with [CDeclCallback]. * */*.custom : tag native callback delegates with [CDeclCallback]. svn path=/trunk/gtk-sharp/; revision=42253
91 lines
2.3 KiB
C#
91 lines
2.3 KiB
C#
// WeakObject.cs - Object to hold managed references via native weakref.
|
|
//
|
|
// Authors: Mike Kestner <mkestner@novell.com>
|
|
//
|
|
// Copyright (c) 2005 Novell, Inc.
|
|
//
|
|
// This program is free software; you can redistribute it and/or
|
|
// modify it under the terms of version 2 of the Lesser GNU General
|
|
// Public License as published by the Free Software Foundation.
|
|
//
|
|
// This program 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.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this program; if not, write to the
|
|
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
// Boston, MA 02111-1307, USA.
|
|
|
|
|
|
namespace GLib {
|
|
|
|
using System;
|
|
using System.Collections;
|
|
using System.Runtime.InteropServices;
|
|
|
|
internal class WeakObject {
|
|
|
|
GCHandle gc_handle;
|
|
|
|
static DestroyNotify notify = new DestroyNotify (OnNativeDestroy);
|
|
[CDeclCallback]
|
|
delegate void DestroyNotify (IntPtr data);
|
|
static void OnNativeDestroy (IntPtr data)
|
|
{
|
|
GCHandle gch = (GCHandle) data;
|
|
WeakObject obj = gch.Target as WeakObject;
|
|
obj.Dispose ();
|
|
gch.Free ();
|
|
}
|
|
|
|
void Dispose ()
|
|
{
|
|
signals = null;
|
|
data = null;
|
|
}
|
|
|
|
WeakObject (IntPtr obj)
|
|
{
|
|
gc_handle = GCHandle.Alloc (this);
|
|
g_object_set_data_full (obj, "gtk_sharp_weak_object", (IntPtr) gc_handle, notify);
|
|
}
|
|
|
|
Hashtable data;
|
|
public Hashtable Data {
|
|
get {
|
|
if (data == null)
|
|
data = new Hashtable ();
|
|
return data;
|
|
}
|
|
}
|
|
|
|
Hashtable signals;
|
|
public Hashtable Signals {
|
|
get {
|
|
if (signals == null)
|
|
signals = new Hashtable ();
|
|
return signals;
|
|
}
|
|
}
|
|
|
|
public static WeakObject Lookup (IntPtr obj)
|
|
{
|
|
IntPtr data = g_object_get_data (obj, "gtk_sharp_weak_object");
|
|
if (data == IntPtr.Zero)
|
|
return new WeakObject (obj);
|
|
|
|
GCHandle gch = (GCHandle) data;
|
|
return gch.Target as WeakObject;
|
|
}
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern IntPtr g_object_get_data (IntPtr instance, string key);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_object_set_data_full (IntPtr instance, string key, IntPtr data, DestroyNotify notify);
|
|
}
|
|
}
|
|
|