mirror of
https://github.com/zeromq/libzmq.git
synced 2024-12-12 18:40:27 +01:00
66 lines
1.3 KiB
Plaintext
66 lines
1.3 KiB
Plaintext
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_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()_ and
|
|
_zmq_msg_init_size()_ are mutually exclusive. Never initialise the same
|
|
'zmq_msg_t' twice.
|
|
|
|
|
|
RETURN VALUE
|
|
------------
|
|
The _zmq_msg_init()_ function shall return zero if successful. Otherwise it
|
|
shall return `-1` and set 'errno' to one of the values defined below.
|
|
|
|
|
|
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_recv (socket, &msg, 0);
|
|
assert (nbytes != -1);
|
|
----
|
|
|
|
|
|
SEE ALSO
|
|
--------
|
|
linkzmq:zmq_msg_init_size[3]
|
|
linkzmq:zmq_msg_init_data[3]
|
|
linkzmq:zmq_msg_close[3]
|
|
linkzmq:zmq_msg_data[3]
|
|
linkzmq:zmq_msg_size[3]
|
|
linkzmq: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>.
|