GtkSharp/glib/ManagedValue.cs
Mike Kestner 57810954a3 2007-03-08 Mike Kestner <mkestner@novell.com>
* glib/*.cs : add try/catch blocks to native callback
	methods for DestroyNotify, Copy/Free, and ToggleNotify handlers.  
	Raise UnhandledException events on catches.  

svn path=/trunk/gtk-sharp/; revision=73965
2007-03-08 20:28:24 +00:00

99 lines
2.5 KiB
C#

// GLib.ManagedValue.cs : Managed types boxer
//
// Author: Rachel Hestilow <hestilow@ximian.com>
//
// Copyright (c) 2002 Rachel Hestilow
//
// 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;
using GLib;
internal class ManagedValue {
[CDeclCallback]
delegate IntPtr CopyFunc (IntPtr gch);
[CDeclCallback]
delegate void FreeFunc (IntPtr gch);
static CopyFunc copy;
static FreeFunc free;
static GType boxed_type = GType.Invalid;
[DllImport("libgobject-2.0-0.dll")]
static extern IntPtr g_boxed_type_register_static (IntPtr typename, CopyFunc copy_func, FreeFunc free_func);
public static GType GType {
get {
if (boxed_type == GType.Invalid) {
copy = new CopyFunc (Copy);
free = new FreeFunc (Free);
IntPtr name = Marshaller.StringToPtrGStrdup ("GtkSharpValue");
boxed_type = new GLib.GType (g_boxed_type_register_static (name, copy, free));
Marshaller.Free (name);
}
return boxed_type;
}
}
static IntPtr Copy (IntPtr ptr)
{
try {
if (ptr == IntPtr.Zero)
return ptr;
GCHandle gch = (GCHandle) ptr;
return (IntPtr) GCHandle.Alloc (gch.Target);
} catch (Exception e) {
ExceptionManager.RaiseUnhandledException (e, false);
}
return IntPtr.Zero;
}
static void Free (IntPtr ptr)
{
try {
if (ptr == IntPtr.Zero)
return;
GCHandle gch = (GCHandle) ptr;
gch.Free ();
} catch (Exception e) {
ExceptionManager.RaiseUnhandledException (e, false);
}
}
public static IntPtr WrapObject (object obj)
{
if (obj == null)
return IntPtr.Zero;
return (IntPtr) GCHandle.Alloc (obj);
}
public static object ObjectForWrapper (IntPtr ptr)
{
if (ptr == IntPtr.Zero)
return null;
return ((GCHandle)ptr).Target;
}
}
}