From 059beca59d39d90a8ee0e1b07f840994962ea89e Mon Sep 17 00:00:00 2001
From: Martin Sustrik <sustrik@fastmq.commkdir>
Date: Wed, 12 Aug 2009 09:40:16 +0200
Subject: listener/connecter/init/session added

---
 src/zmq_engine.cpp | 107 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 104 insertions(+), 3 deletions(-)

(limited to 'src/zmq_engine.cpp')

diff --git a/src/zmq_engine.cpp b/src/zmq_engine.cpp
index 3708c9a..3620d30 100644
--- a/src/zmq_engine.cpp
+++ b/src/zmq_engine.cpp
@@ -19,17 +19,118 @@
 
 #include "zmq_engine.hpp"
 #include "io_thread.hpp"
+#include "i_inout.hpp"
+#include "config.hpp"
+#include "err.hpp"
 
-zmq::zmq_engine_t::zmq_engine_t (io_thread_t *parent_, object_t *owner_) :
-    io_object_t (parent_, owner_)
+zmq::zmq_engine_t::zmq_engine_t (io_thread_t *parent_, fd_t fd_) :
+    io_object_t (parent_),
+    insize (0),
+    inpos (0),
+    outsize (0),
+    outpos (0),
+    inout (NULL)
 {
+    //  Allocate read & write buffer.
+    inbuf = (unsigned char*) malloc (in_batch_size);
+    zmq_assert (inbuf);
+    outbuf = (unsigned char*) malloc (out_batch_size);
+    zmq_assert (outbuf);
+
+    //  Initialise the underlying socket.
+    int rc = tcp_socket.open (fd_);
+    zmq_assert (rc == 0);
 }
 
 zmq::zmq_engine_t::~zmq_engine_t ()
 {
+    free (outbuf);
+    free (inbuf);
+}
+
+void zmq::zmq_engine_t::plug (i_inout *inout_)
+{
+    encoder.set_inout (inout_);
+    decoder.set_inout (inout_);
+
+    handle = add_fd (tcp_socket.get_fd ());
+    set_pollin (handle);
+    set_pollout (handle);
+
+    inout = inout_;
+}
+
+void zmq::zmq_engine_t::unplug ()
+{
+    rm_fd (handle);
+    inout = NULL;
+}
+
+void zmq::zmq_engine_t::in_event ()
+{
+    //  If there's no data to process in the buffer, read new data.
+    if (inpos == insize) {
+
+        //  Read as much data as possible to the read buffer.
+        insize = tcp_socket.read (inbuf, in_batch_size);
+printf ("%d bytes read\n", (int) insize);
+        inpos = 0;
+
+        //  Check whether the peer has closed the connection.
+        if (insize == -1) {
+            insize = 0;
+            error ();
+            return;
+        }
+    }
+
+    //  Following code should be executed even if there's not a single byte in
+    //  the buffer. There still can be a decoded messages stored in the decoder.
+
+    //  Push the data to the decoder.
+    int nbytes = decoder.write (inbuf + inpos, insize - inpos);
+
+    //  Adjust read position. Stop polling for input if we got stuck.
+    inpos += nbytes;
+    if (inpos < insize)
+        reset_pollin (handle);
+
+    //  If at least one byte was processed, flush all messages the decoder
+    //  may have produced.
+    if (nbytes > 0)
+        inout->flush ();
+
 }
 
-void zmq::zmq_engine_t::process_plug ()
+void zmq::zmq_engine_t::out_event ()
 {
+    //  If write buffer is empty, try to read new data from the encoder.
+    if (outpos == outsize) {
+
+        outsize = encoder.read (outbuf, out_batch_size);
+        outpos = 0;
+
+        //  If there is no data to send, stop polling for output.
+        if (outsize == 0)
+            reset_pollout (handle);
+    }
+
+    //  If there are any data to write in write buffer, write as much as
+    //  possible to the socket.
+    if (outpos < outsize) {
+        int nbytes = tcp_socket.write (outbuf + outpos, outsize - outpos);
+
+        //  Handle problems with the connection.
+        if (nbytes == -1) {
+            error ();
+            return;
+        }
+
+        outpos += nbytes;
+    }
 }
 
+void zmq::zmq_engine_t::error ()
+{
+    zmq_assert (false);
+}
-- 
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