1 files changed, 160 insertions, 0 deletions
diff --git a/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/lb.cpp b/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/lb.cpp
new file mode 100644
index 00000000..44b11ea7
--- /dev/null
+++ b/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/lb.cpp
@@ -0,0 +1,160 @@
+/*
+    Copyright (c) 2007-2015 Contributors as noted in the AUTHORS file
+
+    This file is part of libzmq, the ZeroMQ core engine in C++.
+
+    libzmq is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    As a special exception, the Contributors give you permission to link
+    this library with independent modules to produce an executable,
+    regardless of the license terms of these independent modules, and to
+    copy and distribute the resulting executable under terms of your choice,
+    provided that you also meet, for each linked independent module, the
+    terms and conditions of the license of that module. An independent
+    module is a module which is not derived from or based on this library.
+    If you modify this library, you must extend this exception to your
+    version of the library.
+
+    libzmq 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/>.
+*/
+
+#include "lb.hpp"
+#include "pipe.hpp"
+#include "err.hpp"
+#include "msg.hpp"
+
+zmq::lb_t::lb_t () :
+    active (0),
+    current (0),
+    more (false),
+    dropping (false)
+{
+}
+
+zmq::lb_t::~lb_t ()
+{
+    zmq_assert (pipes.empty ());
+}
+
+void zmq::lb_t::attach (pipe_t *pipe_)
+{
+    pipes.push_back (pipe_);
+    activated (pipe_);
+}
+
+void zmq::lb_t::pipe_terminated (pipe_t *pipe_)
+{
+    pipes_t::size_type index = pipes.index (pipe_);
+
+    //  If we are in the middle of multipart message and current pipe
+    //  have disconnected, we have to drop the remainder of the message.
+    if (index == current && more)
+        dropping = true;
+
+    //  Remove the pipe from the list; adjust number of active pipes
+    //  accordingly.
+    if (index < active) {
+        active--;
+        pipes.swap (index, active);
+        if (current == active)
+            current = 0;
+    }
+    pipes.erase (pipe_);
+}
+
+void zmq::lb_t::activated (pipe_t *pipe_)
+{
+    //  Move the pipe to the list of active pipes.
+    pipes.swap (pipes.index (pipe_), active);
+    active++;
+}
+
+int zmq::lb_t::send (msg_t *msg_)
+{
+    return sendpipe (msg_, NULL);
+}
+
+int zmq::lb_t::sendpipe (msg_t *msg_, pipe_t **pipe_)
+{
+    //  Drop the message if required. If we are at the end of the message
+    //  switch back to non-dropping mode.
+    if (dropping) {
+
+        more = msg_->flags () & msg_t::more ? true : false;
+        dropping = more;
+
+        int rc = msg_->close ();
+        errno_assert (rc == 0);
+        rc = msg_->init ();
+        errno_assert (rc == 0);
+        return 0;
+    }
+
+    while (active > 0) {
+        if (pipes [current]->write (msg_))
+        {
+            if (pipe_)
+                *pipe_ = pipes [current];
+            break;
+        }
+
+        zmq_assert (!more);
+        active--;
+        if (current < active)
+            pipes.swap (current, active);
+        else
+            current = 0;
+    }
+
+    //  If there are no pipes we cannot send the message.
+    if (active == 0) {
+        errno = EAGAIN;
+        return -1;
+    }
+
+    //  If it's final part of the message we can flush it downstream and
+    //  continue round-robining (load balance).
+    more = msg_->flags () & msg_t::more? true: false;
+    if (!more) {
+        pipes [current]->flush ();
+        current = (current + 1) % active;
+    }
+
+    //  Detach the message from the data buffer.
+    int rc = msg_->init ();
+    errno_assert (rc == 0);
+
+    return 0;
+}
+
+bool zmq::lb_t::has_out ()
+{
+    //  If one part of the message was already written we can definitely
+    //  write the rest of the message.
+    if (more)
+        return true;
+
+    while (active > 0) {
+
+        //  Check whether a pipe has room for another message.
+        if (pipes [current]->check_write ())
+            return true;
+
+        //  Deactivate the pipe.
+        active--;
+        pipes.swap (current, active);
+        if (current == active)
+            current = 0;
+    }
+
+    return false;
+}