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// Opaque .cs - Opaque struct wrapper implementation
//
// Authors: Bob Smith <bob@thestuff.net>
// Mike Kestner <mkestner@speakeasy.net>
// Rachel Hestilow <hestilow@ximian.com>
//
// Copyright (c) 2001 Bob Smith
// Copyright (c) 2001 Mike Kestner
// Copyright (c) 2002 Rachel Hestilow
// Copyright (c) 2004 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;
public class Opaque : IWrapper, IDisposable {
IntPtr _obj;
bool owned;
public static Opaque GetOpaque (IntPtr o, Type type, bool owned)
{
if (o == IntPtr.Zero)
return null;
Opaque opaque = (Opaque)Activator.CreateInstance (type, new object[] { o });
if (owned) {
if (opaque.owned) {
// The constructor took a Ref it shouldn't have, so undo it
opaque.Unref (o);
}
opaque.owned = true;
} else
opaque = opaque.Copy (o);
return opaque;
}
public Opaque ()
{
owned = true;
}
public Opaque (IntPtr raw)
{
owned = false;
Raw = raw;
}
protected IntPtr Raw {
get {
return _obj;
}
set {
if (_obj == value) {
return;
}
if (_obj != IntPtr.Zero) {
Unref (_obj);
if (owned)
Free (_obj);
}
_obj = value;
if (_obj != IntPtr.Zero) {
Ref (_obj);
}
}
}
#region IDisposable implementation
class FinalizerInfo
{
IntPtr handle;
Action<IntPtr> unrefFunc;
public FinalizerInfo (Action<IntPtr> unrefFunc, IntPtr handle)
{
this.handle = handle;
this.unrefFunc = unrefFunc;
}
public bool Handler ()
{
unrefFunc (handle);
return false;
}
}
~Opaque ()
{
Dispose (false);
}
public void Dispose ()
{
Raw = IntPtr.Zero;
Dispose (true);
GC.SuppressFinalize (this);
}
protected void Dispose (bool disposing)
{
if (Disposed)
return;
Disposed = true;
if (disposing) {
DisposeManagedResources ();
}
DisposeUnmanagedResources ();
}
/// <summary>
/// Disposes the managed resources.
/// This method is intended to be overriden.
/// </summary>
protected virtual void DisposeManagedResources ()
{
}
/// <summary>
/// Disposes the unmanaged resources.
/// This method is intended to be overriden.
/// </summary>
protected virtual void DisposeUnmanagedResources ()
{
if (!Owned || DisposeUnmanagedFunc == null)
return;
FinalizerInfo info = new FinalizerInfo (DisposeUnmanagedFunc, Handle);
Timeout.Add (50, new TimeoutHandler (info.Handler));
}
protected internal bool Disposed { get; private set; } = false;
protected virtual Action<IntPtr> DisposeUnmanagedFunc { get; }
#endregion
// These take an IntPtr arg so we don't get conflicts if we need
// to have an "[Obsolete] public void Ref ()"
protected virtual void Ref (IntPtr raw) {}
protected virtual void Unref (IntPtr raw) {}
protected virtual void Free (IntPtr raw) {}
protected virtual Opaque Copy (IntPtr raw)
{
return this;
}
public IntPtr Handle {
get {
return _obj;
}
}
public IntPtr OwnedCopy {
get {
Opaque result = Copy (Handle);
result.Owned = false;
return result.Handle;
}
}
public bool Owned {
get {
return owned;
}
set {
owned = value;
}
}
public override bool Equals (object o)
{
if (!(o is Opaque))
return false;
return (Handle == ((Opaque) o).Handle);
}
public override int GetHashCode ()
{
return Handle.GetHashCode ();
}
}
}
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