GtkSharp/glib/ManagedValue.cs
Mike Kestner 73632b2747 2004-05-28 Mike Kestner <mkestner@ximian.com>
* generator/ObjectGen.cs : adjust to ObjectManager ns change.
	* glib/ManagedValue.cs : move to GLib and internalize.
	* glib/Object.cs : adjust to ObjectManager ns change.
	* glib/ObjectManager.cs : move to GLib.
	* glib/TypeConverter.cs : move to GLib.  return ManagedValue.GType
	when we can't match a type instead of GType.None.
	* gtk/*.custom: adjust for new TypeConverter ns and behavior.

2004-05-28  Mike Kestner  <mkestner@ximian.com>

	* en/* : run updater. fix a few *Sharp copy/pastisms.

svn path=/trunk/gtk-sharp/; revision=28362
2004-05-28 16:59:21 +00:00

98 lines
2.3 KiB
C#

// GLib.ManagedValue.cs : Managed types boxer
//
// Author: Rachel Hestilow <hestilow@ximian.com>
//
// (c) 2002 Rachel Hestilow
namespace GLib {
using System;
using System.Collections;
using System.Runtime.InteropServices;
using GLib;
/// <summary>
/// Managed types boxer
/// </summary>
///
/// <remarks>
/// Utility class for creating GBoxed wrappers around managed types
/// </remarks>
// FIXME:
// This used to use GCHandles, but I rewrote it to debug
// some odd interactions. Since the boxed code in GLib is designed
// to not interact directly with the pointers, just using our own
// arbitrary pointer values is fine. Still, it might be useful
// to use GCHandle later on.
internal class ManagedValue {
private class ValueHolder {
public object val;
public int ref_count;
}
private delegate IntPtr CopyFunc (IntPtr ptr);
private delegate void FreeFunc (IntPtr ptr);
private static Hashtable pointers = new Hashtable ();
private static IntPtr cur_ptr = IntPtr.Zero;
private static CopyFunc copy;
private static FreeFunc free;
private static GType boxed_type = GType.Invalid;
[DllImport("libgobject-2.0-0.dll")]
private static extern IntPtr g_boxed_type_register_static (string 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);
boxed_type = new GLib.GType (g_boxed_type_register_static ("GtkSharpValue", copy, free));
}
return boxed_type;
}
}
public static IntPtr Copy (IntPtr ptr)
{
ValueHolder holder = (ValueHolder) pointers[ptr];
holder.ref_count++;
return ptr;
}
public static void Free (IntPtr ptr)
{
ValueHolder holder = (ValueHolder) pointers[ptr];
if (holder == null)
return;
holder.ref_count--;
if (holder.ref_count < 1)
pointers.Remove (ptr);
}
public static IntPtr WrapObject (object obj)
{
ValueHolder holder = new ValueHolder ();
holder.val = obj;
holder.ref_count = 1;
cur_ptr = new IntPtr (((int) cur_ptr) + 1);
pointers[cur_ptr] = holder;
return cur_ptr;
}
public static object ObjectForWrapper (IntPtr ptr)
{
if (!pointers.Contains (ptr))
return null;
ValueHolder holder = (ValueHolder) pointers[ptr];
return holder.val;
}
}
}