1 files changed, 141 insertions, 0 deletions
diff --git a/src/pgm_receiver.hpp b/src/pgm_receiver.hpp
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+++ b/src/pgm_receiver.hpp
@@ -0,0 +1,141 @@
+/*
+    Copyright (c) 2009-2011 250bpm s.r.o.
+    Copyright (c) 2007-2009 iMatix Corporation
+    Copyright (c) 2010-2011 Miru Limited
+    Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser 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
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_PGM_RECEIVER_HPP_INCLUDED__
+#define __ZMQ_PGM_RECEIVER_HPP_INCLUDED__
+
+#include "platform.hpp"
+
+#if defined ZMQ_HAVE_OPENPGM
+
+#ifdef ZMQ_HAVE_WINDOWS
+#include "windows.hpp"
+#endif
+
+#include <map>
+#include <algorithm>
+
+#include "io_object.hpp"
+#include "i_engine.hpp"
+#include "options.hpp"
+#include "decoder.hpp"
+#include "pgm_socket.hpp"
+
+namespace zmq
+{
+
+    class io_thread_t;
+    class session_base_t;
+
+    class pgm_receiver_t : public io_object_t, public i_engine
+    {
+    
+    public:
+
+        pgm_receiver_t (zmq::io_thread_t *parent_, const options_t &options_);
+        ~pgm_receiver_t ();
+
+        int init (bool udp_encapsulation_, const char *network_);
+
+        //  i_engine interface implementation.
+        void plug (zmq::io_thread_t *io_thread_,
+            zmq::session_base_t *session_);
+        void terminate ();
+        void activate_in ();
+        void activate_out ();
+
+        //  i_poll_events interface implementation.
+        void in_event ();
+        void timer_event (int token);
+
+    private:
+
+        //  Unplug the engine from the session.
+        void unplug ();
+
+        //  PGM is not able to move subscriptions upstream. Thus, drop all
+        //  the pending subscriptions.
+        void drop_subscriptions ();
+
+        //  RX timeout timer ID.
+        enum {rx_timer_id = 0xa1};
+
+        //  RX timer is running.
+        bool has_rx_timer;
+
+        //  If joined is true we are already getting messages from the peer.
+        //  It it's false, we are getting data but still we haven't seen
+        //  beginning of a message.
+        struct peer_info_t
+        {
+            bool joined;
+            decoder_t *decoder;
+        };
+
+        struct tsi_comp
+        {
+            bool operator () (const pgm_tsi_t &ltsi,
+                const pgm_tsi_t &rtsi) const
+            {
+                uint32_t ll[2], rl[2];
+                memcpy (ll, &ltsi, sizeof (ll));
+                memcpy (rl, &rtsi, sizeof (rl));
+                return (ll[0] < rl[0]) || (ll[0] == rl[0] && ll[1] < rl[1]);
+            }
+        };
+
+        typedef std::map <pgm_tsi_t, peer_info_t, tsi_comp> peers_t;
+        peers_t peers;
+
+        //  PGM socket.
+        pgm_socket_t pgm_socket;
+
+        //  Socket options.
+        options_t options;
+
+        //  Associated session.
+        zmq::session_base_t *session;
+
+        //  Most recently used decoder.
+        decoder_t *mru_decoder;
+
+        //  Number of bytes not consumed by the decoder due to pipe overflow.
+        size_t pending_bytes;
+
+        //  Pointer to data still waiting to be processed by the decoder.
+        unsigned char *pending_ptr;
+
+        //  Poll handle associated with PGM socket.
+        handle_t socket_handle;
+
+        //  Poll handle associated with engine PGM waiting pipe.
+        handle_t pipe_handle;
+
+        pgm_receiver_t (const pgm_receiver_t&);
+        const pgm_receiver_t &operator = (const pgm_receiver_t&);
+    };
+
+}
+
+#endif
+
+#endif