table of contents
| ZMQ_MSG_INIT(3) | 0MQ Manual | 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.
| 01/18/2023 | 0MQ 4.3.4 |