Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

mcs/class/corlib/Mono/SafeGPtrArrayHandle.cs

@@ -0,0 +1,38 @@
+//
+// Safe handle class for Mono.RuntimeGPtrArrayHandle
+//
+// Authors:
+//   Aleksey Kliger <aleksey@xamarin.com>
+//   Rodrigo Kumpera <kumpera@xamarin.com>
+//
+// Copyright 2016 Dot net foundation.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Mono {
+	internal struct SafeGPtrArrayHandle : IDisposable {
+		RuntimeGPtrArrayHandle handle;
+
+		internal SafeGPtrArrayHandle (IntPtr ptr)
+		{
+			handle = new RuntimeGPtrArrayHandle (ptr);
+		}
+
+		public void Dispose () {
+			RuntimeGPtrArrayHandle.DestroyAndFree (ref handle);
+		}
+
+		internal int Length {
+			get {
+				return handle.Length;
+			}
+		}
+
+		internal IntPtr this[int i] => handle[i];
+	}
+
+
+}