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/*
Copyright (c) 2010-2011 250bpm s.r.o.
Copyright (c) 2010-2011 Other 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 <stdio.h>
#include "testutil.hpp"
int main (void)
{
fprintf (stderr, "test_hwm running...\n");
void *ctx = zmq_init (1);
assert (ctx);
// Create pair of socket, each with high watermark of 2. Thus the total
// buffer space should be 4 messages.
void *sb = zmq_socket (ctx, ZMQ_PULL);
assert (sb);
int hwm = 2;
int rc = zmq_setsockopt (sb, ZMQ_RCVHWM, &hwm, sizeof (hwm));
assert (rc == 0);
rc = zmq_bind (sb, "inproc://a");
assert (rc == 0);
void *sc = zmq_socket (ctx, ZMQ_PUSH);
assert (sc);
rc = zmq_setsockopt (sc, ZMQ_SNDHWM, &hwm, sizeof (hwm));
assert (rc == 0);
rc = zmq_connect (sc, "inproc://a");
assert (rc == 0);
// Try to send 10 messages. Only 4 should succeed.
for (int i = 0; i < 10; i++)
{
int rc = zmq_send (sc, NULL, 0, ZMQ_DONTWAIT);
if (i < 4)
assert (rc == 0);
else
assert (rc < 0 && errno == EAGAIN);
}
// There should be now 4 messages pending, consume them.
for (int i = 0; i != 4; i++) {
rc = zmq_recv (sb, NULL, 0, 0);
assert (rc == 0);
}
// Now it should be possible to send one more.
rc = zmq_send (sc, NULL, 0, 0);
assert (rc == 0);
// Consume the remaining message.
rc = zmq_recv (sb, NULL, 0, 0);
assert (rc == 0);
rc = zmq_close (sc);
assert (rc == 0);
rc = zmq_close (sb);
assert (rc == 0);
rc = zmq_term (ctx);
assert (rc == 0);
return 0;
}
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