1 /* Copyright (c) 2008, 2009, 2010. 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. */
10 #include "surf/surf_private.h"
12 int host(int argc, char *argv[]);
13 unsigned int task_comp_size = 50000000;
14 unsigned int task_comm_size = 1000000;
16 int nb_hosts; /* All declared hosts */
18 XBT_LOG_NEW_DEFAULT_CATEGORY(ring,
19 "Messages specific for this msg example");
21 /** @addtogroup MSG_examples
23 * @section MSG_ex_apps Examples of full applications
25 * - <b>token_ring/ring_call.c</b>: Classical token ring
26 * communication, where a token is exchanged along a ring to reach
31 int host(int argc, char *argv[])
33 int host_number = atoi(MSG_process_get_name(MSG_process_self()));
35 msg_task_t task = NULL;
36 _XBT_GNUC_UNUSED int res;
37 if (host_number == 0){ //master send then receive
38 sprintf(mailbox, "%d", host_number+1);
39 task = MSG_task_create("Token", task_comp_size, task_comm_size, NULL);
40 XBT_INFO("Host \"%d\" send '%s' to Host \"%s\"",host_number,task->name,mailbox);
41 MSG_task_send(task, mailbox);
43 res = MSG_task_receive(&(task), MSG_process_get_name(MSG_process_self()));
44 xbt_assert(res == MSG_OK, "MSG_task_get failed");
45 XBT_INFO("Host \"%d\" received \"%s\"",host_number, MSG_task_get_name(task));
46 MSG_task_destroy(task);
48 else{ //slave receive then send
49 res = MSG_task_receive(&(task), MSG_process_get_name(MSG_process_self()));
50 xbt_assert(res == MSG_OK, "MSG_task_get failed");
51 XBT_INFO("Host \"%d\" received \"%s\"",host_number, MSG_task_get_name(task));
53 if(host_number+1 == nb_hosts)
54 sprintf(mailbox, "0");
56 sprintf(mailbox, "%d", host_number+1);
57 XBT_INFO("Host \"%d\" send '%s' to Host \"%s\"",host_number,task->name,mailbox);
58 MSG_task_send(task, mailbox);
63 int main(int argc, char **argv)
66 MSG_init(&argc, argv);
67 MSG_create_environment(argv[1]);
68 xbt_dynar_t hosts = MSG_hosts_as_dynar();
69 nb_hosts = xbt_dynar_length(hosts);
70 MSG_function_register("host", host);
72 XBT_INFO("Number of host '%d'",nb_hosts);
73 for(i = 0 ; i<nb_hosts; i++)
75 char* name_host = bprintf("%d",i);
76 MSG_process_create( name_host, host, NULL, xbt_dynar_get_as(hosts,i,msg_host_t) );
79 xbt_dynar_free(&hosts);
82 XBT_INFO("Simulation time %g", MSG_get_clock());