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authorMartin Lucina <martin@lucina.net>2012-01-23 08:53:19 +0100
committerMartin Lucina <martin@lucina.net>2012-01-23 08:53:19 +0100
commita15854bd92db69fcd0b4444fe1b8fe3610a7acf6 (patch)
tree1214b945d0f0033ff318de367c70525ea141ef56 /src/zmq_init.cpp
Imported Upstream version 2.0.7.dfsgupstream/2.0.7.dfsg
Diffstat (limited to 'src/zmq_init.cpp')
-rw-r--r--src/zmq_init.cpp195
1 files changed, 195 insertions, 0 deletions
diff --git a/src/zmq_init.cpp b/src/zmq_init.cpp
new file mode 100644
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+++ b/src/zmq_init.cpp
@@ -0,0 +1,195 @@
+/*
+ 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 <string.h>
+
+#include "zmq_init.hpp"
+#include "zmq_engine.hpp"
+#include "io_thread.hpp"
+#include "session.hpp"
+#include "uuid.hpp"
+#include "err.hpp"
+
+zmq::zmq_init_t::zmq_init_t (io_thread_t *parent_, socket_base_t *owner_,
+ fd_t fd_, const options_t &options_, bool reconnect_,
+ const char *protocol_, const char *address_, uint64_t session_ordinal_) :
+ owned_t (parent_, owner_),
+ sent (false),
+ received (false),
+ session_ordinal (session_ordinal_),
+ options (options_)
+{
+ // Create the engine object for this connection.
+ engine = new (std::nothrow) zmq_engine_t (parent_, fd_, options,
+ reconnect_, protocol_, address_);
+ zmq_assert (engine);
+}
+
+zmq::zmq_init_t::~zmq_init_t ()
+{
+ if (engine)
+ delete engine;
+}
+
+bool zmq::zmq_init_t::read (::zmq_msg_t *msg_)
+{
+ // If the identity was already sent, do nothing.
+ if (sent)
+ return false;
+
+ // Send the identity.
+ int rc = zmq_msg_init_size (msg_, options.identity.size ());
+ zmq_assert (rc == 0);
+ memcpy (zmq_msg_data (msg_), options.identity.c_str (),
+ options.identity.size ());
+ sent = true;
+
+ // If initialisation is done, pass the engine to the session and
+ // destroy the init object.
+ finalise ();
+
+ return true;
+}
+
+bool zmq::zmq_init_t::write (::zmq_msg_t *msg_)
+{
+ // If identity was already received, we are not interested
+ // in subsequent messages.
+ if (received)
+ return false;
+
+ // Retreieve the remote identity. If it's empty, generate a unique name.
+ if (!zmq_msg_size (msg_)) {
+ unsigned char identity [uuid_t::uuid_blob_len + 1];
+ identity [0] = 0;
+ memcpy (identity + 1, uuid_t ().to_blob (), uuid_t::uuid_blob_len);
+ peer_identity.assign (identity, uuid_t::uuid_blob_len + 1);
+ }
+ else {
+ peer_identity.assign ((const unsigned char*) zmq_msg_data (msg_),
+ zmq_msg_size (msg_));
+ }
+
+ received = true;
+
+ return true;
+}
+
+void zmq::zmq_init_t::flush ()
+{
+ // Check if there's anything to flush.
+ if (!received)
+ return;
+
+ // If initialisation is done, pass the engine to the session and
+ // destroy the init object.
+ finalise ();
+}
+
+void zmq::zmq_init_t::detach (owned_t *reconnecter_)
+{
+ // This function is called by engine when disconnection occurs.
+
+ // If required, launch the reconnecter.
+ if (reconnecter_) {
+ send_plug (reconnecter_);
+ send_own (owner, reconnecter_);
+ }
+
+ // The engine will destroy itself, so let's just drop the pointer here and
+ // start termination of the init object.
+ engine = NULL;
+ term ();
+}
+
+zmq::io_thread_t *zmq::zmq_init_t::get_io_thread ()
+{
+ return choose_io_thread (options.affinity);
+}
+
+class zmq::socket_base_t *zmq::zmq_init_t::get_owner ()
+{
+ return owner;
+}
+
+uint64_t zmq::zmq_init_t::get_ordinal ()
+{
+ return session_ordinal;
+}
+
+void zmq::zmq_init_t::process_plug ()
+{
+ zmq_assert (engine);
+ engine->plug (this);
+}
+
+void zmq::zmq_init_t::process_unplug ()
+{
+ if (engine)
+ engine->unplug ();
+}
+
+void zmq::zmq_init_t::finalise ()
+{
+ if (sent && received) {
+
+ // Disconnect the engine from the init object.
+ engine->unplug ();
+
+ session_t *session = NULL;
+
+ // If we have the session ordinal, let's use it to find the session.
+ // If it is not found, it means socket is already being shut down
+ // and the session have been deallocated.
+ // TODO: We should check whether the name of the peer haven't changed
+ // upon reconnection.
+ if (session_ordinal) {
+ session = owner->find_session (session_ordinal);
+ if (!session) {
+ term ();
+ return;
+ }
+ }
+ else {
+
+ // If the peer has a unique name, find the associated session.
+ // If it does not exist, create it.
+ zmq_assert (!peer_identity.empty ());
+ session = owner->find_session (peer_identity);
+ if (!session) {
+ session = new (std::nothrow) session_t (
+ choose_io_thread (options.affinity), owner, options,
+ peer_identity);
+ zmq_assert (session);
+ send_plug (session);
+ send_own (owner, session);
+
+ // Reserve a sequence number for following 'attach' command.
+ session->inc_seqnum ();
+ }
+ }
+
+ // No need to increment seqnum as it was already incremented above.
+ send_attach (session, engine, peer_identity, false);
+
+ // Destroy the init object.
+ engine = NULL;
+ term ();
+ }
+}