zmq_msg_init man page

zmq_msg_init — initialise empty 0MQ message


int zmq_msg_init (zmq_msg_t *msg);


The zmq_msg_init() function shall initialise the message object referenced by msg to represent an empty message. This function is most useful when called before receiving a message with zmq_recv().


Never access zmq_msg_t members directly, instead always use the zmq_msg family of functions.


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() function shall return zero if successful. Otherwise it shall return -1 and set errno to one of the values defined below.


No errors are defined.


Receiving a message from a socket.

zmq_msg_t msg;
rc = zmq_msg_init (&msg);
assert (rc == 0);
rc = zmq_recv (socket, &msg, 0);
assert (rc == 0);

See Also

zmq_msg_init_size(3) zmq_msg_init_data(3) zmq_msg_close(3) zmq_msg_data(3) zmq_msg_size(3) zmq(7)


This manual page was written by the 0MQ community.

Referenced By

zmq(7), zmq_cpp(7), zmq_msg_close(3), zmq_msg_copy(3), zmq_msg_data(3), zmq_msg_get(3), zmq_msg_init_data(3), zmq_msg_init_size(3), zmq_msg_more(3), zmq_msg_move(3), zmq_msg_size(3).

04/04/2012 0MQ 2.2.0 0MQ Manual