Manpages - zmq_msg_init.3

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_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.

The zmq_msg_init() function always returns zero.

No errors are defined.

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);

*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)

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