Initial checkin of gRPC to third_party/

third_party/grpc/src/csharp/Grpc.Core/Profiling/ProfilerScope.cs

 #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/
+
+// 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
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // 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
-    
-namespace Google.Protobuf
+
+using System;
+using System.IO;
+using System.Threading;
+using Grpc.Core.Internal;
+
+namespace Grpc.Core.Profiling
 {
-    // Just a sample enum with positive and negative values to be used in tests.
-    internal enum SampleEnum
+    // Allows declaring Begin and End of a profiler scope with a using statement.
+    // declared as struct for better performance.
+    internal struct ProfilerScope : IDisposable
     {
-        NegativeValue = -2,
-        None = 0,
-        PositiveValue = 3
+        readonly IProfiler profiler;
+        readonly string tag;
+
+        public ProfilerScope(IProfiler profiler, string tag)
+        {
+            this.profiler = profiler;
+            this.tag = tag;
+            this.profiler.Begin(this.tag);
+        }
+            
+        public void Dispose()
+        {
+            profiler.End(tag);
+        }
     }
 }