ZMQ_MSG_GET

Section: 0MQ Manual (3)
Updated: 10/14/2014
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NAME

zmq_msg_get - get message property  

SYNOPSIS

int zmq_msg_get (zmq_msg_t *message, int property);  

DESCRIPTION

The zmq_msg_get() function shall return the value for the property specified by the property argument for the message pointed to by the message argument.

The following properties can be retrieved with the zmq_msg_get() function:

ZMQ_MORE

Indicates that there are more message frames to follow after the message.
 

RETURN VALUE

The zmq_msg_get() function shall return the value for the property if successful. Otherwise it shall return -1 and set errno to one of the values defined below.  

ERRORS

EINVAL

The requested property is unknown.
 

EXAMPLE

Receiving a multi-frame message.

zmq_msg_t frame;
while (true) {
    //  Create an empty 0MQ message to hold the message frame
    int rc = zmq_msg_init (&frame);
    assert (rc == 0);
    //  Block until a message is available to be received from socket
    rc = zmq_msg_recv (socket, &frame, 0);
    assert (rc != -1);
    if (zmq_msg_get (&frame, ZMQ_MORE))
        fprintf (stderr, "more\n");
    else {
        fprintf (stderr, "end\n");
        break;
    }
    zmq_msg_close (&frame);
}

 

SEE ALSO

zmq_msg_set(3) zmq_msg_init(3) zmq_msg_close(3) zmq(7)  

AUTHORS

This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at m[blue]http://www.zeromq.org/docs:contributingm[].


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
EXAMPLE
SEE ALSO
AUTHORS