Imported Upstream version 5.18.0.142

Former-commit-id: 7467d4b717762eeaf652d77f1486dd11ffb1ff1f

mcs/class/System/Mono.AppleTls/SafeHandles.cs

@@ -0,0 +1,71 @@
+//
+// SafeHandles.Mono.cs
+//
+// Author:
+//       Martin Baulig <mabaul@microsoft.com>
+//
+// Copyright (c) 2018 Xamarin Inc. (http://www.xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System.Runtime.InteropServices;
+using System.Security.Cryptography.Apple;
+using Microsoft.Win32.SafeHandles;
+using Mono.Net;
+
+namespace System.Security.Cryptography.X509Certificates
+{
+	sealed partial class SafeSecIdentityHandle : SafeKeychainItemHandle
+	{
+		public SafeSecIdentityHandle ()
+		{
+		}
+	}
+
+	sealed partial class SafeSecCertificateHandle : SafeKeychainItemHandle
+	{
+		public SafeSecCertificateHandle ()
+		{
+		}
+	}
+}
+
+namespace System.Security.Cryptography.Apple
+{
+	partial class SafeKeychainItemHandle : SafeHandle
+	{
+		internal SafeKeychainItemHandle ()
+		    : base (IntPtr.Zero, ownsHandle: true)
+		{
+		}
+
+		protected override bool ReleaseHandle ()
+		{
+			if (handle != IntPtr.Zero)
+				CFObject.CFRelease (handle);
+			SetHandle (IntPtr.Zero);
+			return true;
+		}
+
+		public override bool IsInvalid => handle == IntPtr.Zero;
+	}
+
+	partial class SafeSecKeyRefHandle : SafeKeychainItemHandle
+	{
+	}
+}