THRIFT-1184 event_base memory freeing by class TNonblockingServer
adds option to use existing event base
Patch: Pavlin Radoslavov

git-svn-id: https://svn.apache.org/repos/asf/thrift/trunk@1153307 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/src/server/TNonblockingServer.h b/lib/cpp/src/server/TNonblockingServer.h
index 7b1cf4d..31741e4 100644
--- a/lib/cpp/src/server/TNonblockingServer.h
+++ b/lib/cpp/src/server/TNonblockingServer.h
@@ -132,6 +132,7 @@
 
   /// The event base for libevent
   event_base* eventBase_;
+  bool ownEventBase_;
 
   /// Event struct, used with eventBase_ for connection events
   struct event serverEvent_;
@@ -234,6 +235,7 @@
     port_(port),
     threadPoolProcessing_(false),
     eventBase_(NULL),
+    ownEventBase_(false),
     numTConnections_(0),
     numActiveProcessors_(0),
     connectionStackLimit_(CONNECTION_STACK_LIMIT),
@@ -259,6 +261,7 @@
     port_(port),
     threadManager_(threadManager),
     eventBase_(NULL),
+    ownEventBase_(false),
     numTConnections_(0),
     numActiveProcessors_(0),
     connectionStackLimit_(CONNECTION_STACK_LIMIT),
@@ -293,6 +296,7 @@
     port_(port),
     threadManager_(threadManager),
     eventBase_(NULL),
+    ownEventBase_(false),
     numTConnections_(0),
     numActiveProcessors_(0),
     connectionStackLimit_(CONNECTION_STACK_LIMIT),
@@ -704,8 +708,10 @@
    * Register the core libevent events onto the proper base.
    *
    * @param base pointer to the event base to be initialized.
+   * @param ownEventBase if true, this server is responsible for
+   * freeing the event base memory.
    */
-  void registerEvents(event_base* base);
+  void registerEvents(event_base* base, bool ownEventBase = true);
 
   /**
    * Main workhorse function, starts up the server listening on a port and