Another checkpoint of initial cut at thread pool manager for thrift and related concurrency classes.

Added TimerManager -  I can't live without one after all.

Added Util - handy place for common time operations et al.

Initial test code


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@664722 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/src/concurrency/Mutex.cc b/lib/cpp/src/concurrency/Mutex.cc
index 39d768e..8282e73 100644
--- a/lib/cpp/src/concurrency/Mutex.cc
+++ b/lib/cpp/src/concurrency/Mutex.cc
@@ -3,6 +3,11 @@
 #include <assert.h>
 #include <pthread.h>
 
+/** Implementation of Mutex class using POSIX mutex
+
+    @author marc
+    @version $Id:$ */
+
 namespace facebook { namespace thrift { namespace concurrency { 
 
 class Mutex::impl {