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diff --git a/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/io_thread.hpp b/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/io_thread.hpp
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+++ b/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/io_thread.hpp
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+/*
+    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/>.
+*/
+
+#ifndef __ZMQ_IO_THREAD_HPP_INCLUDED__
+#define __ZMQ_IO_THREAD_HPP_INCLUDED__
+
+#include <vector>
+
+#include "stdint.hpp"
+#include "object.hpp"
+#include "poller.hpp"
+#include "i_poll_events.hpp"
+#include "mailbox.hpp"
+
+namespace zmq
+{
+
+    class ctx_t;
+
+    //  Generic part of the I/O thread. Polling-mechanism-specific features
+    //  are implemented in separate "polling objects".
+
+    class io_thread_t : public object_t, public i_poll_events
+    {
+    public:
+
+        io_thread_t (zmq::ctx_t *ctx_, uint32_t tid_);
+
+        //  Clean-up. If the thread was started, it's neccessary to call 'stop'
+        //  before invoking destructor. Otherwise the destructor would hang up.
+        ~io_thread_t ();
+
+        //  Launch the physical thread.
+        void start ();
+
+        //  Ask underlying thread to stop.
+        void stop ();
+
+        //  Returns mailbox associated with this I/O thread.
+        mailbox_t *get_mailbox ();
+
+        //  i_poll_events implementation.
+        void in_event ();
+        void out_event ();
+        void timer_event (int id_);
+
+        //  Used by io_objects to retrieve the assciated poller object.
+        poller_t *get_poller ();
+
+        //  Command handlers.
+        void process_stop ();
+
+        //  Returns load experienced by the I/O thread.
+        int get_load ();
+
+    private:
+
+        //  I/O thread accesses incoming commands via this mailbox.
+        mailbox_t mailbox;
+
+        //  Handle associated with mailbox' file descriptor.
+        poller_t::handle_t mailbox_handle;
+
+        //  I/O multiplexing is performed using a poller object.
+        poller_t *poller;
+
+        io_thread_t (const io_thread_t&);
+        const io_thread_t &operator = (const io_thread_t&);
+    };
+
+}
+
+#endif