mirror of
https://github.com/Ryujinx/GtkSharp.git
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64073ff268
* glib/Makefile.am : add new file. * glib/Object.cs : add protected PersistentData hash to hold data across GC cycles. * glib/WeakObject.cs : new object to hold managed refs weakly against the native object. * gtk/ListStore.custom : hold refs for DefaultSortFuncs. * gtk/TreeModelSort.custom : hold refs for DefaultSortFuncs. * gtk/TreeStore.custom : hold refs for DefaultSortFuncs. svn path=/trunk/gtk-sharp/; revision=41740
90 lines
2.2 KiB
C#
90 lines
2.2 KiB
C#
// WeakObject.cs - Object to hold managed references via native weakref.
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//
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// Authors: Mike Kestner <mkestner@novell.com>
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//
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// Copyright (c) 2005 Novell, Inc.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the Lesser GNU General
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// Public License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this program; if not, write to the
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// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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namespace GLib {
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using System;
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using System.Collections;
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using System.Runtime.InteropServices;
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internal class WeakObject {
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GCHandle gc_handle;
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static DestroyNotify notify = new DestroyNotify (OnNativeDestroy);
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delegate void DestroyNotify (IntPtr data);
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static void OnNativeDestroy (IntPtr data)
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{
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GCHandle gch = (GCHandle) data;
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WeakObject obj = gch.Target as WeakObject;
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obj.Dispose ();
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gch.Free ();
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}
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void Dispose ()
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{
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signals = null;
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data = null;
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}
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WeakObject (IntPtr obj)
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{
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gc_handle = GCHandle.Alloc (this);
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g_object_set_data_full (obj, "gtk_sharp_weak_object", (IntPtr) gc_handle, notify);
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}
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Hashtable data;
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public Hashtable Data {
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get {
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if (data == null)
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data = new Hashtable ();
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return data;
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}
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}
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Hashtable signals;
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public Hashtable Signals {
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get {
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if (signals == null)
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signals = new Hashtable ();
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return signals;
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}
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}
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public static WeakObject Lookup (IntPtr obj)
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{
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IntPtr data = g_object_get_data (obj, "gtk_sharp_weak_object");
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if (data == IntPtr.Zero)
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return new WeakObject (obj);
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GCHandle gch = (GCHandle) data;
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return gch.Target as WeakObject;
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}
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_object_get_data (IntPtr instance, string key);
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[DllImport("libgobject-2.0-0.dll")]
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static extern void g_object_set_data_full (IntPtr instance, string key, IntPtr data, DestroyNotify notify);
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}
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}
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