Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

external/cecil/Mono/Disposable.cs

@@ -0,0 +1,45 @@
+//
+// Author:
+//   Jb Evain (jbevain@gmail.com)
+//
+// Copyright (c) 2008 - 2015 Jb Evain
+// Copyright (c) 2008 - 2011 Novell, Inc.
+//
+// Licensed under the MIT/X11 license.
+//
+
+using System;
+
+namespace Mono {
+
+	static class Disposable {
+
+		public static Disposable<T> Owned<T> (T value) where T : class, IDisposable
+		{
+			return new Disposable<T> (value, owned: true);
+		}
+
+		public static Disposable<T> NotOwned<T> (T value) where T : class, IDisposable
+		{
+			return new Disposable<T> (value, owned: false);
+		}
+	}
+
+	struct Disposable<T> : IDisposable where T : class, IDisposable {
+
+		internal readonly T value;
+		readonly bool owned;
+
+		public Disposable (T value, bool owned)
+		{
+			this.value = value;
+			this.owned = owned;
+		}
+
+		public void Dispose ()
+		{
+			if (value != null && owned)
+				value.Dispose ();
+		}
+	}
+}