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);

SEE ALSO

zmq_msg_init_size(3) zmq_msg_init_buffer(3) zmq_msg_init_data(3) zmq_msg_close(3) zmq_msg_data(3) zmq_msg_size(3) 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.