1 files changed, 66 insertions, 0 deletions
diff --git a/src/csharp/Grpc.Core/Internal/DefaultDeserializationContext.cs b/src/csharp/Grpc.Core/Internal/DefaultDeserializationContext.cs
new file mode 100644
index 0000000000..7ace80e8d5
--- /dev/null
+++ b/src/csharp/Grpc.Core/Internal/DefaultDeserializationContext.cs
@@ -0,0 +1,66 @@
+#region Copyright notice and license
+
+// Copyright 2018 The gRPC Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#endregion
+
+using Grpc.Core.Utils;
+using System;
+using System.Threading;
+
+namespace Grpc.Core.Internal
+{
+    internal class DefaultDeserializationContext : DeserializationContext
+    {
+        static readonly ThreadLocal<DefaultDeserializationContext> threadLocalInstance =
+            new ThreadLocal<DefaultDeserializationContext>(() => new DefaultDeserializationContext(), false);
+
+        byte[] payload;
+        bool alreadyCalledPayloadAsNewBuffer;
+
+        public DefaultDeserializationContext()
+        {
+            Reset();
+        }
+
+        public override int PayloadLength => payload.Length;
+
+        public override byte[] PayloadAsNewBuffer()
+        {
+            GrpcPreconditions.CheckState(!alreadyCalledPayloadAsNewBuffer);
+            alreadyCalledPayloadAsNewBuffer = true;
+            return payload;
+        }
+
+        public void Initialize(byte[] payload)
+        {
+            this.payload = GrpcPreconditions.CheckNotNull(payload);
+            this.alreadyCalledPayloadAsNewBuffer = false;
+        }
+
+        public void Reset()
+        {
+            this.payload = null;
+            this.alreadyCalledPayloadAsNewBuffer = true;  // mark payload as read
+        }
+
+        public static DefaultDeserializationContext GetInitializedThreadLocal(byte[] payload)
+        {
+            var instance = threadLocalInstance.Value;
+            instance.Initialize(payload);
+            return instance;
+        }
+    }
+}