zmq_msg_more (3) Linux Manual Page

zmq_msg_more – indicate if there are more message parts to receive

Synopsis

int zmq_msg_more(zmq_msg_t *message);

Description

The zmq_msg_more() function indicates whether this is part of a multi-part message, and there are further parts to receive. This method can safely be called after zmq_msg_close(). This method is identical to zmq_msg_get() with an argument of ZMQ_MORE.

Return Value

The zmq_msg_more() function shall return zero if this is the final part of a multi-part message, or the only part of a single-part message. It shall return 1 if there are further parts to receive.

Example

Receiving a multi-part message.

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

See Also

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

Authors

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