1 /* Copyright (c) 2008-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "simgrid/msg.h"
9 XBT_LOG_NEW_DEFAULT_CATEGORY(ring, "Messages specific for this msg example");
11 /** @addtogroup MSG_examples
13 * @section MSG_ex_apps Examples of full applications
15 * - <b>token_ring/ring_call.c</b>: Classical token ring communication, where a token is exchanged along a ring to
16 * reach every participant.
19 static int host(int argc, char *argv[])
21 unsigned int task_comp_size = 50000000;
22 unsigned int task_comm_size = 1000000;
24 xbt_str_parse_int(MSG_process_get_name(MSG_process_self()), "Process name must be an integer but is: %s");
26 msg_task_t task = NULL;
27 XBT_ATTRIB_UNUSED int res;
28 if (host_number == 0){ //master send then receive
29 sprintf(mailbox, "%d", host_number+1);
30 task = MSG_task_create("Token", task_comp_size, task_comm_size, NULL);
31 XBT_INFO("Host \"%d\" send '%s' to Host \"%s\"",host_number,task->name,mailbox);
32 MSG_task_send(task, mailbox);
34 res = MSG_task_receive(&(task), MSG_process_get_name(MSG_process_self()));
35 xbt_assert(res == MSG_OK, "MSG_task_get failed");
36 XBT_INFO("Host \"%d\" received \"%s\"",host_number, MSG_task_get_name(task));
37 MSG_task_destroy(task);
38 } else{ //slave receive then send
39 res = MSG_task_receive(&(task), MSG_process_get_name(MSG_process_self()));
40 xbt_assert(res == MSG_OK, "MSG_task_get failed");
41 XBT_INFO("Host \"%d\" received \"%s\"",host_number, MSG_task_get_name(task));
43 if(host_number+1 == MSG_get_host_number())
44 sprintf(mailbox, "0");
46 sprintf(mailbox, "%d", host_number+1);
47 XBT_INFO("Host \"%d\" send '%s' to Host \"%s\"",host_number,task->name,mailbox);
48 MSG_task_send(task, mailbox);
53 int main(int argc, char **argv)
56 MSG_init(&argc, argv);
57 MSG_create_environment(argv[1]);
58 xbt_dynar_t hosts = MSG_hosts_as_dynar();
60 MSG_function_register("host", host);
62 XBT_INFO("Number of host '%d'",MSG_get_host_number());
63 xbt_dynar_foreach (hosts, i, h){
64 char* name_host = bprintf("%u",i);
65 MSG_process_create(name_host, host, NULL, h);
68 xbt_dynar_free(&hosts);
71 XBT_INFO("Simulation time %g", MSG_get_clock());