From 7f0d198e037b58ce6bee3e0d9d48fba757785091 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 10 Apr 2017 10:40:44 +0200
Subject: [PATCH] avoid boxing of IntPtr

---
 .../Grpc.Core/Internal/CompletionRegistry.cs   | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs b/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
index 7e2f0e9c6c9..a4aa8d3ffe4 100644
--- a/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
+++ b/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
@@ -51,7 +51,7 @@ namespace Grpc.Core.Internal
         static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<CompletionRegistry>();
 
         readonly GrpcEnvironment environment;
-        readonly ConcurrentDictionary<IntPtr, OpCompletionDelegate> dict = new ConcurrentDictionary<IntPtr, OpCompletionDelegate>();
+        readonly ConcurrentDictionary<IntPtr, OpCompletionDelegate> dict = new ConcurrentDictionary<IntPtr, OpCompletionDelegate>(new IntPtrComparer());
 
         public CompletionRegistry(GrpcEnvironment environment)
         {
@@ -121,5 +121,21 @@ namespace Grpc.Core.Internal
                 }
             }
         }
+
+        /// <summary>
+        /// IntPtr doesn't implement <c>IEquatable{IntPtr}</c> so we need to use custom comparer to avoid boxing.
+        /// </summary>
+        private class IntPtrComparer : IEqualityComparer<IntPtr>
+        {
+            public bool Equals(IntPtr x, IntPtr y)
+            {
+                return x == y;
+            }
+
+            public int GetHashCode(IntPtr obj)
+            {
+                return obj.GetHashCode();
+            }
+        }
     }
 }