Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

mcs/class/corlib/ReferenceSources/SharedStatics.cs

@@ -0,0 +1,22 @@
+using System.Threading;
+using StringMaker = System.Security.Util.Tokenizer.StringMaker;
+
+namespace System
+{
+	static class SharedStatics
+	{
+		static StringMaker shared;
+		static public StringMaker GetSharedStringMaker ()
+		{
+			if (shared == null)
+				Interlocked.CompareExchange (ref shared, new StringMaker (), null);
+
+			return shared;
+		}
+
+		static public void ReleaseSharedStringMaker (ref StringMaker maker)
+		{
+
+		}
+	}
+}