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diff --git a/scripts/external_libs/zmq/backend/cython/message.pxd b/scripts/external_libs/zmq/backend/cython/message.pxd
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+"""0MQ Message related class declarations."""
+
+#
+# Copyright (c) 2010-2011 Brian E. Granger & Min Ragan-Kelley
+#
+# This file is part of pyzmq.
+#
+# pyzmq 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.
+#
+# pyzmq 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/>.
+#
+
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+
+from cpython cimport PyBytes_FromStringAndSize
+
+from libzmq cimport zmq_msg_t, zmq_msg_data, zmq_msg_size
+
+#-----------------------------------------------------------------------------
+# Code
+#-----------------------------------------------------------------------------
+
+cdef class MessageTracker(object):
+
+ cdef set events # Message Event objects to track.
+ cdef set peers # Other Message or MessageTracker objects.
+
+
+cdef class Frame:
+
+ cdef zmq_msg_t zmq_msg
+ cdef object _data # The actual message data as a Python object.
+ cdef object _buffer # A Python Buffer/View of the message contents
+ cdef object _bytes # A bytes/str copy of the message.
+ cdef bint _failed_init # Flag to handle failed zmq_msg_init
+ cdef public object tracker_event # Event for use with zmq_free_fn.
+ cdef public object tracker # MessageTracker object.
+ cdef public bint more # whether RCVMORE was set
+
+ cdef Frame fast_copy(self) # Create shallow copy of Message object.
+ cdef object _getbuffer(self) # Construct self._buffer.
+
+
+cdef inline object copy_zmq_msg_bytes(zmq_msg_t *zmq_msg):
+ """ Copy the data from a zmq_msg_t """
+ cdef char *data_c = NULL
+ cdef Py_ssize_t data_len_c
+ data_c = <char *>zmq_msg_data(zmq_msg)
+ data_len_c = zmq_msg_size(zmq_msg)
+ return PyBytes_FromStringAndSize(data_c, data_len_c)
+
+