1 /* Copyright (c) 2015-2020. 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/s4u/Engine.hpp"
23 #include "simgrid/s4u/Host.hpp"
24 #include "simgrid/s4u/Mailbox.hpp"
25 #include "simgrid/s4u/Mutex.hpp"
27 XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
29 static int receiver(const char* box_name)
31 auto mb = simgrid::s4u::Mailbox::by_name(box_name);
34 payload = static_cast<int*>(mb->get());
35 MC_assert(*payload == 1);
38 payload = static_cast<int*>(mb->get());
39 MC_assert(*payload == 2);
45 static int sender(const char* box_name, simgrid::s4u::MutexPtr mutex, int value)
47 auto* payload = new int(value);
48 auto mb = simgrid::s4u::Mailbox::by_name(box_name);
53 mb->put(static_cast<void*>(payload), 8);
61 int main(int argc, char* argv[])
63 simgrid::s4u::Engine e(&argc, argv);
64 xbt_assert(argc > 1, "Usage: %s platform_file\n"
65 "\tExample: %s msg_platform.xml\n",
68 simgrid::s4u::MutexPtr mutex;
69 #ifndef DISABLE_THE_MUTEX
70 mutex = simgrid::s4u::Mutex::create();
73 e.load_platform(argv[1]);
74 simgrid::s4u::Actor::create("receiver", simgrid::s4u::Host::by_name("Jupiter"), receiver, "box");
75 simgrid::s4u::Actor::create("sender", simgrid::s4u::Host::by_name("Boivin"), sender, "box", mutex, 1);
76 simgrid::s4u::Actor::create("sender", simgrid::s4u::Host::by_name("Fafard"), sender, "box", mutex, 2);
79 XBT_INFO("Simulation time %g", e.get_clock());