center alloc node queue; node just find them.

lichao

2021-05-08 36e6a35a886252516f168b90f7a9a7c1c5177312

 src/topic_node.h

@@ -122,7 +122,7 @@
         eSockSub,
         eSockEnd,
   };
   std::vector<std::unique_ptr<ShmSocket>> sockets_;
   std::vector<std::shared_ptr<ShmSocket>> sockets_;

   ShmSocket &SockNode() { return *sockets_[eSockNode]; }
   ShmSocket &SockPub() { return *sockets_[eSockPub]; }