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diff --git a/src/dummy_aggregator.cpp b/src/dummy_aggregator.cpp
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+/*
+ Copyright (c) 2007-2009 FastMQ Inc.
+
+ 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 "../include/zs.h"
+
+#include "dummy_aggregator.hpp"
+#include "err.hpp"
+#include "pipe_reader.hpp"
+#include "session.hpp"
+
+// Swaps pipes at specified indices.
+#define swap_pipes(i1_, i2_) \
+ std::swap (pipes [i1_], pipes [i2_]);\
+ pipes [i1_]->set_index (i1_);\
+ pipes [i2_]->set_index (i2_);
+
+zs::dummy_aggregator_t::dummy_aggregator_t () :
+ session (NULL),
+ pipe (NULL),
+ active (false)
+{
+}
+
+void zs::dummy_aggregator_t::set_session (session_t *session_)
+{
+ zs_assert (!session);
+ session = session_;
+}
+
+void zs::dummy_aggregator_t::shutdown ()
+{
+ // No need to deallocate the pipe here. It'll be deallocated during the
+ // shutdown of the dispatcher.
+ delete this;
+}
+
+void zs::dummy_aggregator_t::terminate ()
+{
+ if (pipe)
+ pipe->terminate ();
+
+ delete this;
+}
+
+zs::dummy_aggregator_t::~dummy_aggregator_t ()
+{
+}
+
+void zs::dummy_aggregator_t::attach_pipe (pipe_reader_t *pipe_)
+{
+ zs_assert (!pipe);
+ pipe = pipe_;
+ active = true;
+
+ // Associate new pipe with the mux object.
+ pipe_->set_mux (this);
+ session->revive ();
+}
+
+void zs::dummy_aggregator_t::detach_pipe (pipe_reader_t *pipe_)
+{
+ zs_assert (pipe == pipe_);
+ deactivate (pipe_);
+ pipe = NULL;
+}
+
+bool zs::dummy_aggregator_t::empty ()
+{
+ return pipe == NULL;
+}
+
+bool zs::dummy_aggregator_t::recv (zs_msg *msg_)
+{
+ // Deallocate old content of the message.
+ zs_msg_close (msg_);
+
+ // Try to read from the pipe.
+ if (pipe && pipe->read (msg_))
+ return true;
+
+ // No message is available. Initialise the output parameter
+ // to be a 0-byte message.
+ zs_msg_init (msg_);
+ return false;
+}
+
+void zs::dummy_aggregator_t::deactivate (pipe_reader_t *pipe_)
+{
+ active = false;
+}
+
+void zs::dummy_aggregator_t::reactivate (pipe_reader_t *pipe_)
+{
+ active = true;
+}