rename csharp code

Summary: new name

Reviewed By: splhack

Differential Revision: D4247106

fbshipit-source-id: 6e1097de104f3a011c78ae65b33e57865b007711

csharp/Facebook.Yoga/YogaLogger.cs

@@ -0,0 +1,45 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace Facebook.Yoga
+{
+    internal static class YogaLogger
+    {
+        [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
+        public delegate void Func(YogaLogLevel level, string message);
+
+        private static bool _initialized;
+        private static Func _managedLogger = null;
+
+        public static Func Logger = null;
+
+        public static void Initialize()
+        {
+            if (!_initialized)
+            {
+                _managedLogger = (level, message) => {
+                    if (Logger != null)
+                    {
+                        Logger(level, message);
+                    }
+
+                    if (level == YogaLogLevel.Error)
+                    {
+                        throw new InvalidOperationException(message);
+                    }
+                };
+                Native.YGInteropSetLogger(_managedLogger);
+                _initialized = true;
+            }
+        }
+    }
+}