Rename i_inout to i_engine_sink

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

15 files changed, 81 insertions, 111 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index ae20d33..45e8ac0 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -24,7 +24,6 @@ libzmq_la_SOURCES = \
     err.hpp \
     fd.hpp \
     fq.hpp \
-    i_inout.hpp \
     io_object.hpp \
     io_thread.hpp \
     ip.hpp \
diff --git a/src/decoder.cpp b/src/decoder.cpp
index bcf5974..8fc1d5e 100644
--- a/src/decoder.cpp
+++ b/src/decoder.cpp
@@ -22,13 +22,13 @@
 #include <string.h>
 
 #include "decoder.hpp"
-#include "i_inout.hpp"
+#include "i_engine.hpp"
 #include "wire.hpp"
 #include "err.hpp"
 
 zmq::decoder_t::decoder_t (size_t bufsize_, int64_t maxmsgsize_) :
     decoder_base_t <decoder_t> (bufsize_),
-    destination (NULL),
+    sink (NULL),
     maxmsgsize (maxmsgsize_)
 {
     int rc = in_progress.init ();
@@ -44,9 +44,9 @@ zmq::decoder_t::~decoder_t ()
     errno_assert (rc == 0);
 }
 
-void zmq::decoder_t::set_inout (i_inout *destination_)
+void zmq::decoder_t::set_sink (i_engine_sink *sink_)
 {
-    destination = destination_;
+    sink = sink_;
 }
 
 bool zmq::decoder_t::one_byte_size_ready ()
@@ -136,7 +136,7 @@ bool zmq::decoder_t::message_ready ()
 {
     //  Message is completely read. Push it further and start reading
     //  new message. (in_progress is a 0-byte message after this point.)
-    if (!destination || !destination->write (&in_progress))
+    if (!sink || !sink->write (&in_progress))
         return false;
 
     next_step (tmpbuf, 1, &decoder_t::one_byte_size_ready);
diff --git a/src/decoder.hpp b/src/decoder.hpp
index 114ecef..17fab4b 100644
--- a/src/decoder.hpp
+++ b/src/decoder.hpp
@@ -184,7 +184,7 @@ namespace zmq
         decoder_t (size_t bufsize_, int64_t maxmsgsize_);
         ~decoder_t ();
 
-        void set_inout (struct i_inout *destination_);
+        void set_sink (struct i_engine_sink *sink_);
 
     private:
 
@@ -193,7 +193,7 @@ namespace zmq
         bool flags_ready ();
         bool message_ready ();
 
-        struct i_inout *destination;
+        struct i_engine_sink *sink;
         unsigned char tmpbuf [8];
         msg_t in_progress;
 
diff --git a/src/encoder.cpp b/src/encoder.cpp
index f579deb..a9be68c 100644
--- a/src/encoder.cpp
+++ b/src/encoder.cpp
@@ -19,12 +19,12 @@
 */
 
 #include "encoder.hpp"
-#include "i_inout.hpp"
+#include "i_engine.hpp"
 #include "wire.hpp"
 
 zmq::encoder_t::encoder_t (size_t bufsize_) :
     encoder_base_t <encoder_t> (bufsize_),
-    source (NULL)
+    sink (NULL)
 {
     int rc = in_progress.init ();
     errno_assert (rc == 0);
@@ -39,9 +39,9 @@ zmq::encoder_t::~encoder_t ()
     errno_assert (rc == 0);
 }
 
-void zmq::encoder_t::set_inout (i_inout *source_)
+void zmq::encoder_t::set_sink (i_engine_sink *sink_)
 {
-    source = source_;
+    sink = sink_;
 }
 
 bool zmq::encoder_t::size_ready ()
@@ -62,7 +62,7 @@ bool zmq::encoder_t::message_ready ()
     //  Note that new state is set only if write is successful. That way
     //  unsuccessful write will cause retry on the next state machine
     //  invocation.
-    if (!source || !source->read (&in_progress)) {
+    if (!sink || !sink->read (&in_progress)) {
         rc = in_progress.init ();
         errno_assert (rc == 0);
         return false;
diff --git a/src/encoder.hpp b/src/encoder.hpp
index 90b5ffe..4bc22ce 100644
--- a/src/encoder.hpp
+++ b/src/encoder.hpp
@@ -163,14 +163,14 @@ namespace zmq
         encoder_t (size_t bufsize_);
         ~encoder_t ();
 
-        void set_inout (struct i_inout *source_);
+        void set_sink (struct i_engine_sink *sink_);
 
     private:
 
         bool size_ready ();
         bool message_ready ();
 
-        struct i_inout *source;
+        struct i_engine_sink *sink;
         msg_t in_progress;
         unsigned char tmpbuf [10];
 
diff --git a/src/i_engine.hpp b/src/i_engine.hpp
index 7bd4ea6..636985f 100644
--- a/src/i_engine.hpp
+++ b/src/i_engine.hpp
@@ -24,13 +24,15 @@
 namespace zmq
 {
 
+    //  Abstract interface to be implemented by various engines.
+
     struct i_engine
     {
         virtual ~i_engine () {}
 
         //  Plug the engine to the session.
         virtual void plug (class io_thread_t *io_thread_,
-            struct i_inout *inout_) = 0;
+            struct i_engine_sink *sink_) = 0;
 
         //  Unplug the engine from the session.
         virtual void unplug () = 0;
@@ -48,6 +50,25 @@ namespace zmq
         virtual void activate_out () = 0;
     };
 
+    //  Abstract interface to be implemented by engine sinks such as sessions.
+
+    struct i_engine_sink
+    {
+        virtual ~i_engine_sink () {}
+
+        //  Engine asks for a message to send to the network.
+        virtual bool read (class msg_t *msg_) = 0;
+
+        //  Engine received message from the network and sends it further on.
+        virtual bool write (class msg_t *msg_) = 0;
+
+        //  Flush all the previously written messages.
+        virtual void flush () = 0;
+
+        //  Engine is dead. Drop all the references to it.
+        virtual void detach () = 0;
+    };
+
 }
 
 #endif
diff --git a/src/i_inout.hpp b/src/i_inout.hpp
deleted file mode 100644
index 3f8e8e0..0000000
--- a/src/i_inout.hpp
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
-    Copyright (c) 2007-2011 iMatix Corporation
-    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_I_INOUT_HPP_INCLUDED__
-#define __ZMQ_I_INOUT_HPP_INCLUDED__
-
-#include "msg.hpp"
-#include "stdint.hpp"
-
-namespace zmq
-{
-
-    struct i_inout
-    {
-        virtual ~i_inout () {}
-
-        //  Engine asks for a message to send to the network.
-        virtual bool read (msg_t *msg_) = 0;
-
-        //  Engine received message from the network and sends it further on.
-        virtual bool write (msg_t *msg_) = 0;
-
-        //  Flush all the previously written messages.
-        virtual void flush () = 0;
-
-        //  Engine is dead. Drop all the references to it.
-        virtual void detach () = 0;
-    };
-
-}
-
-#endif
diff --git a/src/pgm_receiver.cpp b/src/pgm_receiver.cpp
index bb79ece..1fd687a 100644
--- a/src/pgm_receiver.cpp
+++ b/src/pgm_receiver.cpp
@@ -32,7 +32,6 @@
 #include "err.hpp"
 #include "stdint.hpp"
 #include "wire.hpp"
-#include "i_inout.hpp"
 
 zmq::pgm_receiver_t::pgm_receiver_t (class io_thread_t *parent_, 
       const options_t &options_) :
@@ -40,7 +39,7 @@ zmq::pgm_receiver_t::pgm_receiver_t (class io_thread_t *parent_,
     has_rx_timer (false),
     pgm_socket (true, options_),
     options (options_),
-    inout (NULL),
+    sink (NULL),
     mru_decoder (NULL),
     pending_bytes (0)
 {
@@ -57,7 +56,7 @@ int zmq::pgm_receiver_t::init (bool udp_encapsulation_, const char *network_)
     return pgm_socket.init (udp_encapsulation_, network_);
 }
 
-void zmq::pgm_receiver_t::plug (io_thread_t *io_thread_, i_inout *inout_)
+void zmq::pgm_receiver_t::plug (io_thread_t *io_thread_, i_engine_sink *sink_)
 {
     //  Retrieve PGM fds and start polling.
     int socket_fd;
@@ -68,7 +67,7 @@ void zmq::pgm_receiver_t::plug (io_thread_t *io_thread_, i_inout *inout_)
     set_pollin (pipe_handle);
     set_pollin (socket_handle);
 
-    inout = inout_;
+    sink = sink_;
 }
 
 void zmq::pgm_receiver_t::unplug ()
@@ -91,7 +90,7 @@ void zmq::pgm_receiver_t::unplug ()
     rm_fd (socket_handle);
     rm_fd (pipe_handle);
 
-    inout = NULL;
+    sink = NULL;
 }
 
 void zmq::pgm_receiver_t::terminate ()
@@ -218,7 +217,7 @@ void zmq::pgm_receiver_t::in_event ()
             it->second.decoder = new (std::nothrow) decoder_t (0,
                 options.maxmsgsize);
             alloc_assert (it->second.decoder);
-            it->second.decoder->set_inout (inout);
+            it->second.decoder->set_sink (sink);
         }
 
         mru_decoder = it->second.decoder;
@@ -244,7 +243,7 @@ void zmq::pgm_receiver_t::in_event ()
     }
 
     //  Flush any messages decoder may have produced.
-    inout->flush ();
+    sink->flush ();
 }
 
 void zmq::pgm_receiver_t::timer_event (int token)
diff --git a/src/pgm_receiver.hpp b/src/pgm_receiver.hpp
index 172557f..825e0c1 100644
--- a/src/pgm_receiver.hpp
+++ b/src/pgm_receiver.hpp
@@ -52,7 +52,7 @@ namespace zmq
         int init (bool udp_encapsulation_, const char *network_);
 
         //  i_engine interface implementation.
-        void plug (class io_thread_t *io_thread_, struct i_inout *inout_);
+        void plug (class io_thread_t *io_thread_, struct i_engine_sink *sink_);
         void unplug ();
         void terminate ();
         void activate_in ();
@@ -100,8 +100,8 @@ namespace zmq
         //  Socket options.
         options_t options;
 
-        //  Parent session.
-        i_inout *inout;
+        //  Associated session.
+        i_engine_sink *sink;
 
         //  Most recently used decoder.
         decoder_t *mru_decoder;
diff --git a/src/pgm_sender.cpp b/src/pgm_sender.cpp
index 4d76433..314a0b4 100644
--- a/src/pgm_sender.cpp
+++ b/src/pgm_sender.cpp
@@ -61,7 +61,7 @@ int zmq::pgm_sender_t::init (bool udp_encapsulation_, const char *network_)
     return rc;
 }
 
-void zmq::pgm_sender_t::plug (io_thread_t *io_thread_, i_inout *inout_)
+void zmq::pgm_sender_t::plug (io_thread_t *io_thread_, i_engine_sink *sink_)
 {
     //  Alocate 2 fds for PGM socket.
     int downlink_socket_fd = 0;
@@ -69,7 +69,7 @@ void zmq::pgm_sender_t::plug (io_thread_t *io_thread_, i_inout *inout_)
     int rdata_notify_fd = 0;
     int pending_notify_fd = 0;
 
-    encoder.set_inout (inout_);
+    encoder.set_sink (sink_);
 
     //  Fill fds from PGM transport and add them to the poller.
     pgm_socket.get_sender_fds (&downlink_socket_fd, &uplink_socket_fd,
@@ -106,7 +106,7 @@ void zmq::pgm_sender_t::unplug ()
     rm_fd (uplink_handle);
     rm_fd (rdata_notify_handle);
     rm_fd (pending_notify_handle);
-    encoder.set_inout (NULL);
+    encoder.set_sink (NULL);
 }
 
 void zmq::pgm_sender_t::terminate ()
diff --git a/src/pgm_sender.hpp b/src/pgm_sender.hpp
index 4a21b3f..c29dd12 100644
--- a/src/pgm_sender.hpp
+++ b/src/pgm_sender.hpp
@@ -50,7 +50,7 @@ namespace zmq
         int init (bool udp_encapsulation_, const char *network_);
 
         //  i_engine interface implementation.
-        void plug (class io_thread_t *io_thread_, struct i_inout *inout_);
+        void plug (class io_thread_t *io_thread_, struct i_engine_sink *sink_);
         void unplug ();
         void terminate ();
         void activate_in ();
diff --git a/src/session.hpp b/src/session.hpp
index 1e32722..4c17930 100644
--- a/src/session.hpp
+++ b/src/session.hpp
@@ -22,7 +22,7 @@
 #define __ZMQ_SESSION_HPP_INCLUDED__
 
 #include "own.hpp"
-#include "i_inout.hpp"
+#include "i_engine.hpp"
 #include "io_object.hpp"
 #include "blob.hpp"
 #include "pipe.hpp"
@@ -33,7 +33,7 @@ namespace zmq
     class session_t :
         public own_t,
         public io_object_t,
-        public i_inout,
+        public i_engine_sink,
         public i_pipe_events
     {
     public:
@@ -44,7 +44,7 @@ namespace zmq
         //  To be used once only, when creating the session.
         void attach_pipe (class pipe_t *pipe_);
 
-        //  i_inout interface implementation.
+        //  i_engine_sink interface implementation.
         bool read (msg_t *msg_);
         bool write (msg_t *msg_);
         void flush ();
diff --git a/src/zmq_engine.cpp b/src/zmq_engine.cpp
index 725ba96..b0a7df1 100644
--- a/src/zmq_engine.cpp
+++ b/src/zmq_engine.cpp
@@ -29,7 +29,6 @@
 #include "zmq_engine.hpp"
 #include "zmq_connecter.hpp"
 #include "io_thread.hpp"
-#include "i_inout.hpp"
 #include "config.hpp"
 #include "err.hpp"
 
@@ -40,8 +39,8 @@ zmq::zmq_engine_t::zmq_engine_t (fd_t fd_, const options_t &options_) :
     outpos (NULL),
     outsize (0),
     encoder (out_batch_size),
-    inout (NULL),
-    ephemeral_inout (NULL),
+    sink (NULL),
+    ephemeral_sink (NULL),
     options (options_),
     plugged (false)
 {
@@ -55,18 +54,18 @@ zmq::zmq_engine_t::~zmq_engine_t ()
     zmq_assert (!plugged);
 }
 
-void zmq::zmq_engine_t::plug (io_thread_t *io_thread_, i_inout *inout_)
+void zmq::zmq_engine_t::plug (io_thread_t *io_thread_, i_engine_sink *sink_)
 {
     zmq_assert (!plugged);
     plugged = true;
-    ephemeral_inout = NULL;
+    ephemeral_sink = NULL;
 
     //  Connect to session/init object.
-    zmq_assert (!inout);
-    zmq_assert (inout_);
-    encoder.set_inout (inout_);
-    decoder.set_inout (inout_);
-    inout = inout_;
+    zmq_assert (!sink);
+    zmq_assert (sink_);
+    encoder.set_sink (sink_);
+    decoder.set_sink (sink_);
+    sink = sink_;
 
     //  Connect to I/O threads poller object.
     io_object_t::plug (io_thread_);
@@ -90,10 +89,10 @@ void zmq::zmq_engine_t::unplug ()
     io_object_t::unplug ();
 
     //  Disconnect from init/session object.
-    encoder.set_inout (NULL);
-    decoder.set_inout (NULL);
-    ephemeral_inout = inout;
-    inout = NULL;
+    encoder.set_sink (NULL);
+    decoder.set_sink (NULL);
+    ephemeral_sink = sink;
+    sink = NULL;
 }
 
 void zmq::zmq_engine_t::terminate ()
@@ -149,13 +148,13 @@ void zmq::zmq_engine_t::in_event ()
     //  Flush all messages the decoder may have produced.
     //  If IO handler has unplugged engine, flush transient IO handler.
     if (unlikely (!plugged)) {
-        zmq_assert (ephemeral_inout);
-        ephemeral_inout->flush ();
+        zmq_assert (ephemeral_sink);
+        ephemeral_sink->flush ();
     } else {
-        inout->flush ();
+        sink->flush ();
     }
 
-    if (inout && disconnection)
+    if (sink && disconnection)
         error ();
 }
 
@@ -169,8 +168,8 @@ void zmq::zmq_engine_t::out_event ()
 
         //  If IO handler has unplugged engine, flush transient IO handler.
         if (unlikely (!plugged)) {
-            zmq_assert (ephemeral_inout);
-            ephemeral_inout->flush ();
+            zmq_assert (ephemeral_sink);
+            ephemeral_sink->flush ();
             return;
         }
 
@@ -219,8 +218,8 @@ void zmq::zmq_engine_t::activate_in ()
 
 void zmq::zmq_engine_t::error ()
 {
-    zmq_assert (inout);
-    inout->detach ();
+    zmq_assert (sink);
+    sink->detach ();
     unplug ();
     delete this;
 }
diff --git a/src/zmq_engine.hpp b/src/zmq_engine.hpp
index 47073cc..7f09775 100644
--- a/src/zmq_engine.hpp
+++ b/src/zmq_engine.hpp
@@ -43,7 +43,7 @@ namespace zmq
         ~zmq_engine_t ();
 
         //  i_engine interface implementation.
-        void plug (class io_thread_t *io_thread_, struct i_inout *inout_);
+        void plug (class io_thread_t *io_thread_, struct i_engine_sink *sink_);
         void unplug ();
         void terminate ();
         void activate_in ();
@@ -69,10 +69,10 @@ namespace zmq
         size_t outsize;
         encoder_t encoder;
 
-        i_inout *inout;
+        i_engine_sink *sink;
 
-        //  Detached transient inout handler.
-        i_inout *ephemeral_inout;
+        //  Detached transient sink.
+        i_engine_sink *ephemeral_sink;
 
         options_t options;
 
diff --git a/src/zmq_init.hpp b/src/zmq_init.hpp
index ec9b2b3..3324f5e 100644
--- a/src/zmq_init.hpp
+++ b/src/zmq_init.hpp
@@ -23,7 +23,6 @@
 
 #include <vector>
 
-#include "i_inout.hpp"
 #include "i_engine.hpp"
 #include "stdint.hpp"
 #include "blob.hpp"
@@ -36,7 +35,9 @@ namespace zmq
 
     //  The class handles initialisation phase of 0MQ wire-level protocol.
 
-    class zmq_init_t : public own_t, public i_inout
+    class zmq_init_t :
+        public own_t,
+        public i_engine_sink
     {
     public:
 
@@ -56,7 +57,7 @@ namespace zmq
         void finalise_initialisation ();
         void dispatch_engine ();
 
-        //  i_inout interface implementation.
+        //  i_engine_sink interface implementation.
         bool read (class msg_t *msg_);
         bool write (class msg_t *msg_);
         void flush ();