add test_linger

tests that default LINGER (-1) ensures message delivery.

Note: it fails for large messages ( > 1MB, depending on the system).

tests/Makefile.am

@@ -16,6 +16,7 @@ noinst_PROGRAMS = test_pair_inproc \
                   test_connect_delay \
                   test_last_endpoint \
                   test_term_endpoint \
+                  test_linger \
                   test_monitor \
                   test_router_mandatory \
                   test_probe_router \
@@ -49,6 +50,7 @@ test_hwm_SOURCES = test_hwm.cpp
 test_reqrep_device_SOURCES = test_reqrep_device.cpp
 test_sub_forward_SOURCES = test_sub_forward.cpp
 test_invalid_rep_SOURCES = test_invalid_rep.cpp
+test_linger_SOURCES = test_linger.cpp
 test_msg_flags_SOURCES = test_msg_flags.cpp
 test_connect_resolve_SOURCES = test_connect_resolve.cpp
 test_connect_delay_SOURCES = test_connect_delay.cpp

tests/test_linger.cpp

+/*
+    Copyright (c) 2007-2013 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 "../include/zmq_utils.h"
+#include <stdio.h>
+#include <string.h>
+#include "testutil.hpp"
+
+#define URL "tcp://127.0.0.1:5560"
+
+// sender connects a PUSH socket
+// and sends a message of a given size,
+// closing the socket and terminating the context immediately.
+// LINGER should prevent this from dropping messages.
+
+static void sender(void *vsize)
+{
+    void *context = zmq_ctx_new();
+    void *push = zmq_socket(context, ZMQ_PUSH);
+    zmq_msg_t msg;
+    size_t size = ((size_t *) vsize)[0];
+
+    int rc = zmq_connect(push, URL);
+    assert (rc == 0);
+  
+    rc = zmq_msg_init_size(&msg, size);
+    assert (rc == 0);
+
+    char *buf = (char *) zmq_msg_data(&msg);
+    assert (buf != NULL);
+    for(size_t i = 0; i < size; ++i) {
+        buf[i] = 'x';
+    }
+
+    printf("Sending %lu B ... ", zmq_msg_size(&msg));
+
+    rc = zmq_msg_send(&msg, push, 0);
+    assert (rc == size);
+
+    rc = zmq_msg_close(&msg);
+    assert (rc == 0);
+
+    rc = zmq_close(push);
+    assert (rc == 0);
+
+    rc = zmq_ctx_term(context);
+    assert (rc == 0);
+}
+
+int main (void)
+{
+    void *context = zmq_ctx_new();
+    void *pull = zmq_socket(context, ZMQ_PULL);
+    zmq_msg_t msg;
+    
+    int rc = zmq_bind(pull, URL);
+    assert (rc == 0);
+    
+    // Symptom of test failure is message never received
+    
+    int rcvtimeo = 1000;
+    rc = zmq_setsockopt(pull, ZMQ_RCVTIMEO, &rcvtimeo, sizeof (int));
+    assert (rc == 0);
+    
+    for(int p = 0; p < 25; p += 4)
+    {
+      size_t size = 1 << p;
+      
+      // Start the sender thread
+      void *send_thread = zmq_threadstart(&sender, (void *) &size);
+      
+      zmq_msg_init(&msg);
+      rc = zmq_msg_recv(&msg, pull, 0);
+      if (rc == -1 ) {
+        printf("%s\n", zmq_strerror(zmq_errno()));
+      } else {
+        printf("Received.\n");
+      }
+      assert (rc == size);
+      zmq_msg_close(&msg);
+      zmq_threadclose(send_thread);
+    }
+    zmq_close(pull);
+    zmq_ctx_term(context);
+  
+  return 0;
+}
\ No newline at end of file