1 /* Copyright (c) 2017-2020. 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 C, there is a single way of being informed when an actor exits.
8 * The sg_actor_on_exit() function allows one to register a function to be
9 * executed when this very actor exits. The registered function will run
10 * when this actor terminates (either because its main function returns, or
11 * because it's killed in any way). No simcall are allowed here: your actor
12 * is dead already, so it cannot interact with its environment in any way
13 * (network, executions, disks, etc).
15 * Usually, the functions registered in sg_actor_on_exit() are in charge
16 * of releasing any memory allocated by the actor during its execution.
19 #include <simgrid/actor.h>
20 #include <simgrid/engine.h>
21 #include <simgrid/host.h>
22 #include <simgrid/mailbox.h>
24 #include <xbt/asserts.h>
27 XBT_LOG_NEW_DEFAULT_CATEGORY(actor_exiting, "Messages specific for this example");
29 static void A_on_exit(int ignored1, void* ignored2)
31 XBT_INFO("I stop now");
34 static void actorA_fun(int argc, char* argv[])
36 // Register a lambda function to be executed once it stops
37 sg_actor_on_exit(&A_on_exit, NULL);
39 sg_actor_sleep_for(1);
41 static void actorB_fun(int argc, char* argv[])
43 sg_actor_sleep_for(2);
45 static void C_on_exit(int failed, void* ignored2)
48 XBT_INFO("I was killed!");
50 XBT_INFO("The backtrace would be displayed here if --log=no_loc would not have been passed");
52 xbt_backtrace_display_current();
54 XBT_INFO("Exiting gracefully.");
56 static void actorC_fun(int argc, char* argv[])
58 // Register a lambda function to be executed once it stops
59 sg_actor_on_exit(&C_on_exit, NULL);
61 sg_actor_sleep_for(3);
62 XBT_INFO("And now, induce a deadlock by waiting for a message that will never come\n\n");
63 sg_mailbox_get(sg_mailbox_by_name("nobody"));
64 xbt_die("Receiving is not supposed to succeed when nobody is sending");
67 int main(int argc, char* argv[])
69 simgrid_init(&argc, argv);
70 xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s ../platforms/small_platform.xml\n", argv[0], argv[0]);
72 simgrid_load_platform(argv[1]); /* - Load the platform description */
74 sg_actor_create("A", sg_host_by_name("Tremblay"), actorA_fun, 0, NULL);
75 sg_actor_create("B", sg_host_by_name("Fafard"), actorB_fun, 0, NULL);
76 sg_actor_create("C", sg_host_by_name("Ginette"), actorC_fun, 0, NULL);