Initial checkin of gRPC to third_party/

third_party/grpc/src/csharp/Grpc.Core/Internal/SafeHandleZeroIsInvalid.cs

Index: third_party/grpc/src/csharp/Grpc.Core/Internal/SafeHandleZeroIsInvalid.cs
diff --git a/third_party/protobuf/csharp/src/Google.Protobuf.Test/DeprecatedMemberTest.cs b/third_party/grpc/src/csharp/Grpc.Core/Internal/SafeHandleZeroIsInvalid.cs
similarity index 68%
copy from third_party/protobuf/csharp/src/Google.Protobuf.Test/DeprecatedMemberTest.cs
copy to third_party/grpc/src/csharp/Grpc.Core/Internal/SafeHandleZeroIsInvalid.cs
index 8dfad8b331c1622d9325af438a1eaa6e1c5c25fd..702aea2883ad828c6f0b8e6675bb2b0c56522f92 100644
--- a/third_party/protobuf/csharp/src/Google.Protobuf.Test/DeprecatedMemberTest.cs
+++ b/third_party/grpc/src/csharp/Grpc.Core/Internal/SafeHandleZeroIsInvalid.cs
@@ -1,7 +1,7 @@
-#region Copyright notice and license
-// Protocol Buffers - Google's data interchange format
-// Copyright 2015 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
@@ -28,28 +28,39 @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
 #endregion
-    
+
 using System;
-using System.Reflection;
-using Google.Protobuf.TestProtos;
-using NUnit.Framework;
+using System.Runtime.InteropServices;
 
-namespace Google.Protobuf
+namespace Grpc.Core.Internal
 {
-    public class DeprecatedMemberTest
+    /// <summary>
+    /// Safe handle to wrap native objects.
+    /// </summary>
+    internal abstract class SafeHandleZeroIsInvalid : SafeHandle
     {
-        private static void AssertIsDeprecated(MemberInfo member)
+        public SafeHandleZeroIsInvalid() : base(IntPtr.Zero, true)
+        {
+        }
+
+        public SafeHandleZeroIsInvalid(bool ownsHandle) : base(IntPtr.Zero, ownsHandle)
         {
-            Assert.NotNull(member);
-            Assert.IsTrue(member.IsDefined(typeof(ObsoleteAttribute), false), "Member not obsolete: " + member);
         }
 
-        [Test]
-        public void TestDepreatedPrimitiveValue()
+        public override bool IsInvalid
         {
-            AssertIsDeprecated(typeof(TestDeprecatedFields).GetProperty("DeprecatedInt32"));
+            get
+            {
+                return handle == IntPtr.Zero;
+            }
         }
 
+        protected override bool ReleaseHandle()
+        {
+            // handle is not owned.
+            return true;
+        }
     }
 }