/* Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file This file is part of libzmq, the ZeroMQ core engine in C++. libzmq is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (LGPL) as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. As a special exception, the Contributors give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you must extend this exception to your version of the library. libzmq 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 . */ #include "testutil.hpp" #include "testutil_unity.hpp" SETUP_TEARDOWN_TESTCONTEXT void test () { // Create a publisher void *pub = test_context_socket (ZMQ_XPUB); int hwm = 2000; TEST_ASSERT_SUCCESS_ERRNO (zmq_setsockopt (pub, ZMQ_SNDHWM, &hwm, 4)); TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (pub, "inproc://soname")); // set pub socket options int wait = 1; TEST_ASSERT_SUCCESS_ERRNO (zmq_setsockopt (pub, ZMQ_XPUB_NODROP, &wait, 4)); // Create a subscriber void *sub = test_context_socket (ZMQ_SUB); TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (sub, "inproc://soname")); // Subscribe for all messages. TEST_ASSERT_SUCCESS_ERRNO (zmq_setsockopt (sub, ZMQ_SUBSCRIBE, "", 0)); // we must wait for the subscription to be processed here, otherwise some // or all published messages might be lost recv_string_expect_success (pub, "\1", 0); int hwmlimit = hwm - 1; int send_count = 0; // Send an empty message for (int i = 0; i < hwmlimit; i++) { TEST_ASSERT_SUCCESS_ERRNO (zmq_send (pub, NULL, 0, 0)); send_count++; } int recv_count = 0; do { // Receive the message in the subscriber int rc = zmq_recv (sub, NULL, 0, 0); if (rc == -1) { TEST_ASSERT_EQUAL_INT (EAGAIN, errno); break; } else { TEST_ASSERT_EQUAL_INT (0, rc); recv_count++; if (recv_count == 1) { const int sub_rcvtimeo = 250; TEST_ASSERT_SUCCESS_ERRNO (zmq_setsockopt ( sub, ZMQ_RCVTIMEO, &sub_rcvtimeo, sizeof (sub_rcvtimeo))); } } } while (true); TEST_ASSERT_EQUAL_INT (send_count, recv_count); // Now test real blocking behavior // Set a timeout, default is infinite int timeout = 0; TEST_ASSERT_SUCCESS_ERRNO (zmq_setsockopt (pub, ZMQ_SNDTIMEO, &timeout, 4)); send_count = 0; recv_count = 0; hwmlimit = hwm; // Send an empty message until we get an error, which must be EAGAIN while (zmq_send (pub, "", 0, 0) == 0) send_count++; TEST_ASSERT_EQUAL_INT (EAGAIN, errno); while (zmq_recv (sub, NULL, 0, ZMQ_DONTWAIT) == 0) recv_count++; TEST_ASSERT_EQUAL_INT (send_count, recv_count); // Clean up. test_context_socket_close (pub); test_context_socket_close (sub); } int main () { setup_test_environment (); UNITY_BEGIN (); RUN_TEST (test); return UNITY_END (); }