Multi-hop REQ/REP, part IV., add command deallocation mechanism

src/Makefile.am

@@ -125,6 +125,7 @@ libzmq_la_SOURCES = app_thread.hpp \
     zmq_init.hpp \
     zmq_listener.hpp \
     app_thread.cpp \
+    command.cpp \
     devpoll.cpp \
     dispatcher.cpp \
     downstream.cpp \

src/command.cpp

+/*
+    Copyright (c) 2007-2010 iMatix Corporation
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the Lesser GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    Lesser GNU General Public License for more details.
+
+    You should have received a copy of the Lesser GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "command.hpp"
+
+void zmq::deallocate_command (command_t *cmd_)
+{
+}

src/command.hpp

@@ -107,6 +107,9 @@ namespace zmq
         } args;
     };
 
+    //  Function to deallocate dynamically allocated components of the command.
+    void deallocate_command (command_t *cmd_);
+
 }    
 
 #endif

src/dispatcher.cpp

@@ -117,6 +117,10 @@ zmq::dispatcher_t::~dispatcher_t ()
     while (!pipes.empty ())
         delete *pipes.begin ();
 
+    //  TODO: Deallocate any commands still in the pipes. Keep in mind that
+    //  simple reading from a pipe and deallocating commands won't do as
+    //  command pipe has template parameter D set to true, meaning that
+    //  read may return false even if there are still commands in the pipe.
     delete [] command_pipes;
 
 #ifdef ZMQ_HAVE_WINDOWS

src/object.cpp

@@ -77,17 +77,17 @@ void zmq::object_t::process_command (command_t &cmd_)
 
     case command_t::own:
         process_own (cmd_.args.own.object);
-        return;
+        break;
 
     case command_t::attach:
         process_attach (cmd_.args.attach.engine);
         process_seqnum ();
-        return;
+        break;
 
     case command_t::bind:
         process_bind (cmd_.args.bind.in_pipe, cmd_.args.bind.out_pipe);
         process_seqnum ();
-        return;
+        break;
 
     case command_t::pipe_term:
         process_pipe_term ();
@@ -95,23 +95,27 @@ void zmq::object_t::process_command (command_t &cmd_)
 
     case command_t::pipe_term_ack:
         process_pipe_term_ack ();
-        return;
+        break;
 
     case command_t::term_req:
         process_term_req (cmd_.args.term_req.object);
-        return;
+        break;
     
     case command_t::term:
         process_term ();
-        return;
+        break;
 
     case command_t::term_ack:
         process_term_ack ();
-        return;
+        break;
 
     default:
         zmq_assert (false);
     }
+
+    //  The assumption here is that each command is processed once only,
+    //  so deallocating it after processing is all right.
+    deallocate_command (&cmd_);
 }
 
 void zmq::object_t::register_pipe (class pipe_t *pipe_)