Imported Upstream version 4.2.0.179

Former-commit-id: 0a113cb3a6feb7873f632839b1307cc6033cd595

mcs/class/corlib/ReferenceSources/SecurityContext.cs

@@ -0,0 +1,94 @@
+//
+// SecurityContext.cs: This is CAS disabled SecurityContext version
+//                     it does nothing but has same public API
+//
+// Authors:
+//	Marek Safar  <marek.safar@gmail.com>
+//
+// Copyright (C) 2015 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.
+//
+
+#if !FEATURE_COMPRESSEDSTACK
+
+using System.Runtime.InteropServices;
+using System.Security.Permissions;
+using System.Security.Principal;
+using System.Threading;
+
+namespace System.Security {
+
+	public sealed class SecurityContext : IDisposable
+	{
+		private SecurityContext ()
+		{
+		}
+
+		public SecurityContext CreateCopy ()
+		{
+			return this;
+		}
+
+		static public SecurityContext Capture ()
+		{
+			return new SecurityContext ();
+		}
+		
+		public void Dispose ()
+		{
+		}
+
+		static public bool IsFlowSuppressed ()
+		{
+			return false;
+		} 
+
+		static public bool IsWindowsIdentityFlowSuppressed ()
+		{
+			return false;
+		}
+
+		static public void RestoreFlow ()
+		{
+		}
+
+		// if you got the context then you can use it
+		[SecurityPermission (SecurityAction.Assert, ControlPrincipal = true)]
+		[SecurityPermission (SecurityAction.LinkDemand, Infrastructure = true)]
+		static public void Run (SecurityContext securityContext, ContextCallback callback, object state)
+		{
+			callback (state);
+		}
+
+		[SecurityPermission (SecurityAction.LinkDemand, Infrastructure = true)]
+		static public AsyncFlowControl SuppressFlow ()
+		{
+			throw new NotSupportedException ();
+		}
+
+		static public AsyncFlowControl SuppressFlowWindowsIdentity ()
+		{
+			throw new NotSupportedException ();
+		}
+	}
+}
+
+#endif