test_msg_flags.cpp

/*
    Copyright (c) 2007-2014 Contributors as noted in the AUTHORS file

    This file is part of 0MQ.

    0MQ is free software; you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    0MQ is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "testutil.hpp"

int main (void)
{
    setup_test_environment();
    //  Create the infrastructure
    void *ctx = zmq_ctx_new ();
    assert (ctx);

    void *sb = zmq_socket (ctx, ZMQ_ROUTER);
    assert (sb);

    int rc = zmq_bind (sb, "inproc://a");
    assert (rc == 0);

    void *sc = zmq_socket (ctx, ZMQ_DEALER);
    assert (sc);

    rc = zmq_connect (sc, "inproc://a");
    assert (rc == 0);

    //  Send 2-part message.
    rc = zmq_send (sc, "A", 1, ZMQ_SNDMORE);
    assert (rc == 1);
    rc = zmq_send (sc, "B", 1, 0);
    assert (rc == 1);

    //  Identity comes first.
    zmq_msg_t msg;
    rc = zmq_msg_init (&msg);
    assert (rc == 0);
    rc = zmq_msg_recv (&msg, sb, 0);
    assert (rc >= 0);
    int more = zmq_msg_more (&msg);
    assert (more == 1);

    //  Then the first part of the message body.
    rc = zmq_msg_recv (&msg, sb, 0);
    assert (rc == 1);
    more = zmq_msg_more (&msg);
    assert (more == 1);

    //  And finally, the second part of the message body.
    rc = zmq_msg_recv (&msg, sb, 0);
    assert (rc == 1);
    more = zmq_msg_more (&msg);
    assert (more == 0);

    // Test ZMQ_SHARED property (case 1, refcounted messages)
    zmq_msg_t msg_a;
    rc = zmq_msg_init_size(&msg_a, 1024); // large enough to be a type_lmsg
    assert (rc == 0);

    // Message is not shared
    rc = zmq_msg_get(&msg_a, ZMQ_SHARED);
    assert (rc == 0);

    zmq_msg_t msg_b;
    rc = zmq_msg_init(&msg_b);
    assert (rc == 0);

    rc = zmq_msg_copy(&msg_b, &msg_a);
    assert (rc == 0);

    // Message is now shared
    rc = zmq_msg_get(&msg_b, ZMQ_SHARED);
    assert (rc == 1);

    // cleanup
    rc = zmq_msg_close(&msg_a);
    assert (rc == 0);
    rc = zmq_msg_close(&msg_b);
    assert (rc == 0);

    // Test ZMQ_SHARED property (case 2, constant data messages)
    rc = zmq_msg_init_data(&msg_a, (void*) "TEST", 5, 0, 0);
    assert (rc == 0);

    // Message reports as shared
    rc = zmq_msg_get(&msg_a, ZMQ_SHARED);
    assert (rc == 1);

    // cleanup
    rc = zmq_msg_close(&msg_a);
    assert (rc == 0);

    //  Deallocate the infrastructure.
    rc = zmq_close (sc);
    assert (rc == 0);

    rc = zmq_close (sb);
    assert (rc == 0);

    rc = zmq_ctx_term (ctx);
    assert (rc == 0);
    return 0 ;
}