1 /* Copyright (c) 2015-2019. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 /* In this test, we have two senders sending one message to a common receiver.
7 * The receiver should be able to see any ordering between the two messages.
8 * If we model-check the application with assertions on a specific order of
9 * the messages (see the assertions in the receiver code), it should fail
10 * because both ordering are possible.
12 * If the senders sends the message directly, the current version of the MC
13 * finds that the ordering may differ and the MC find a counter-example.
15 * However, if the senders send the message in a mutex, the MC always let
16 * the first process take the mutex because it thinks that the effect of
17 * a mutex is purely local: the ordering of the messages is always the same
18 * and the MC does not find the counter-example.
21 #include "simgrid/modelchecker.h"
22 #include "simgrid/msg.h"
23 #include <xbt/synchro.h>
25 XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
27 #define BOX_NAME "box"
29 #ifndef DISABLE_THE_MUTEX
30 static sg_mutex_t mutex = NULL;
33 static int receiver(XBT_ATTRIB_UNUSED int argc, XBT_ATTRIB_UNUSED char* argv[])
35 msg_task_t task = NULL;
37 MSG_task_receive(&task, BOX_NAME);
38 MC_assert(strcmp(MSG_task_get_name(task), "X") == 0);
39 MSG_task_destroy(task);
41 MSG_task_receive(&task, BOX_NAME);
42 MC_assert(strcmp(MSG_task_get_name(task), "Y") == 0);
43 MSG_task_destroy(task);
48 static int sender(int argc, char *argv[])
50 xbt_assert(argc == 2);
51 const char* message_name = argv[1];
52 #ifndef DISABLE_THE_MUTEX
55 MSG_task_send(MSG_task_create(message_name, 0.0, 0.0, NULL), BOX_NAME);
56 #ifndef DISABLE_THE_MUTEX
57 sg_mutex_unlock(mutex);
62 int main(int argc, char *argv[])
64 MSG_init(&argc, argv);
65 xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
66 "\tExample: %s msg_platform.xml msg_deployment.xml\n", argv[0], argv[0]);
68 MSG_create_environment(argv[1]);
69 MSG_function_register("receiver", receiver);
70 MSG_function_register("sender", sender);
72 MSG_launch_application(argv[2]);
73 #ifndef DISABLE_THE_MUTEX
74 mutex = sg_mutex_init();
76 msg_error_t res = MSG_main();
77 #ifndef DISABLE_THE_MUTEX
78 sg_mutex_destroy(mutex);
81 XBT_INFO("Simulation time %g", MSG_get_clock());