mirror of
https://github.com/zeromq/libzmq.git
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86 lines
2.3 KiB
C++
86 lines
2.3 KiB
C++
/*
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Copyright (c) 2010-2011 250bpm s.r.o.
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Copyright (c) 2010-2011 Other contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <stdio.h>
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#include "testutil.hpp"
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int main (int argc, char *argv [])
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{
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fprintf (stderr, "test_hwm running...\n");
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void *ctx = zmq_init (1);
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assert (ctx);
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// Create pair of socket, each with high watermark of 2. Thus the total
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// buffer space should be 4 messages.
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void *sb = zmq_socket (ctx, ZMQ_PULL);
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assert (sb);
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int hwm = 2;
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int rc = zmq_setsockopt (sb, ZMQ_RCVHWM, &hwm, sizeof (hwm));
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assert (rc == 0);
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rc = zmq_bind (sb, "inproc://a");
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assert (rc == 0);
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void *sc = zmq_socket (ctx, ZMQ_PUSH);
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assert (sc);
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rc = zmq_setsockopt (sc, ZMQ_SNDHWM, &hwm, sizeof (hwm));
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assert (rc == 0);
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rc = zmq_connect (sc, "inproc://a");
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assert (rc == 0);
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// Try to send 10 messages. Only 4 should succeed.
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for (int i = 0; i < 10; i++)
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{
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int rc = zmq_send (sc, NULL, 0, ZMQ_DONTWAIT);
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if (i < 4)
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assert (rc == 0);
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else
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assert (rc < 0 && errno == EAGAIN);
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}
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// There should be now 4 messages pending, consume them.
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for (int i = 0; i != 4; i++) {
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rc = zmq_recv (sb, NULL, 0, 0);
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assert (rc == 0);
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}
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// Now it should be possible to send one more.
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rc = zmq_send (sc, NULL, 0, 0);
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assert (rc == 0);
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// Consume the remaining message.
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rc = zmq_recv (sb, NULL, 0, 0);
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assert (rc == 0);
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rc = zmq_close (sc);
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assert (rc == 0);
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rc = zmq_close (sb);
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assert (rc == 0);
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rc = zmq_term (ctx);
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assert (rc == 0);
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return 0;
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}
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