zmq_msg_init(3)

zmq_msg_init3

Initialise empty 0mq message

Usage

int zmq_msg_init (zmq_msg_t *msg);

Overview

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_msg_recv().

Caution

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

Caution

The functions zmq_msg_init(), zmq_msg_init_data(), zmq_msg_init_size() and zmq_msg_init_buffer() are mutually exclusive. Never initialise the same zmq_msg_t twice.

Return value

The zmq_msg_init() function always returns zero.

Errors

No errors are defined.

Examples

Receiving a message from a socket.

zmq_msg_t msg;
rc = zmq_msg_init (&msg);
assert (rc == 0);
int nbytes = zmq_msg_recv (socket, &msg, 0);
assert (nbytes != -1);

Releases

8 releases since Debian 7 (Wheezy); the text changed 6 times.

  1. 7–8
  2. 9
  3. 10
  4. 11
  5. 12
  6. 13
  7. Arch

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.

From zeromq 4.3.5-3 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.