zmq_msg_init(3)

NAME

zmq_msg_init - initialise empty 0MQ message

SYNOPSIS

int zmq_msg_init (zmq_msg_t '*msg');

DESCRIPTION

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.

EXAMPLE

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);

AUTHORS

This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at https://zeromq.org/how-to-contribute/.