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+zmq_msg_init_data(3)
+====================
+
+
+NAME
+----
+zmq_msg_init_data - initialise 0MQ message from a supplied buffer
+
+
+SYNOPSIS
+--------
+*typedef void (zmq_free_fn) (void '*data', void '*hint');*
+
+*int zmq_msg_init_data (zmq_msg_t '*msg', void '*data', size_t 'size', zmq_free_fn '*ffn', void '*hint');*
+
+
+DESCRIPTION
+-----------
+The _zmq_msg_init_data()_ function shall initialise the message object
+referenced by 'msg' to represent the content referenced by the buffer located
+at address 'data', 'size' bytes long. No copy of 'data' shall be performed and
+0MQ shall take ownership of the supplied buffer.
+
+If provided, the deallocation function 'ffn' shall be called once the data
+buffer is no longer required by 0MQ, with the 'data' and 'hint' arguments
+supplied to _zmq_msg_init_data()_.
+
+CAUTION: Never access 'zmq_msg_t' members directly, instead always use the
+_zmq_msg_ family of functions.
+
+CAUTION: The deallocation function 'ffn' needs to be thread-safe, since it
+will be called from an arbitrary thread.
+
+CAUTION: The functions _zmq_msg_init()_, _zmq_msg_init_data()_ and
+_zmq_msg_init_size()_ are mutually exclusive. Never initialize the same
+'zmq_msg_t' twice.
+
+
+RETURN VALUE
+------------
+The _zmq_msg_init_data()_ function shall return zero if successful. Otherwise
+it shall return `-1` and set 'errno' to one of the values defined below.
+
+
+ERRORS
+------
+*ENOMEM*::
+Insufficient storage space is available.
+
+
+
+EXAMPLE
+-------
+.Initialising a message from a supplied buffer
+----
+void my_free (void *data, void *hint) 
+{
+    free (data);
+}
+
+    /*  ...  */
+
+void *data = malloc (6);
+assert (data);
+memcpy (data, "ABCDEF", 6);
+zmq_msg_t msg;
+rc = zmq_msg_init_data (&msg, data, 6, my_free, NULL);
+assert (rc == 0);
+----
+
+
+SEE ALSO
+--------
+linkzmq:zmq_msg_init_size[3]
+linkzmq:zmq_msg_init[3]
+linkzmq:zmq_msg_close[3]
+linkzmq:zmq_msg_data[3]
+linkzmq:zmq_msg_size[3]
+linkzmq:zmq[7]
+
+
+AUTHORS
+-------
+This page was written by the 0MQ community. To make a change please
+read the 0MQ Contribution Policy at <http://www.zeromq.org/docs:contributing>.