Add even more of the source

This should be about everything needed to build so far?

CommonUtilitiesLib/StopWatch.h

@@ -0,0 +1,66 @@
+/*
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * Copyright (c) 1999-2008 Apple Inc.  All Rights Reserved.
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ *
+ */
+ 
+
+/*
+    File:       StopWatch.h
+
+    Contains:   classes for stopwatch timers        
+    
+*/ 
+
+
+#include "OS.h"
+
+class MilliSecondStopWatch {
+
+    public:
+            MilliSecondStopWatch () { fStartedAt = -1; fStoppedAt = -1; }
+            
+            void Start() { fStartedAt = OS::Milliseconds(); }
+            void Stop() { fStoppedAt = OS::Milliseconds(); }
+            SInt64  Duration() { return fStoppedAt - fStartedAt; }
+    private:
+        SInt64  fStartedAt;
+        SInt64  fStoppedAt;
+        
+};
+
+
+
+class MicroSecondStopWatch {
+
+    public:
+            MicroSecondStopWatch () { fStartedAt = -1; fStoppedAt = -1; }
+            
+            void Start() { fStartedAt = OS::Microseconds(); }
+            void Stop() { fStoppedAt = OS::Microseconds(); }
+            SInt64  Duration() { return fStoppedAt - fStartedAt; }
+    private:
+        SInt64  fStartedAt;
+        SInt64  fStoppedAt;
+        
+};
+