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. */
9 #include "simgrid/msg.h"
11 int host(int argc, char *argv[]);
12 unsigned int task_comp_size = 50000000;
13 unsigned int task_comm_size = 1000000;
15 int nb_hosts; /* All declared hosts */
17 XBT_LOG_NEW_DEFAULT_CATEGORY(ring,
18 "Messages specific for this msg example");
20 /** @addtogroup MSG_examples
22 * @section MSG_ex_apps Examples of full applications
24 * - <b>token_ring/ring_call.c</b>: Classical token ring
25 * communication, where a token is exchanged along a ring to reach
30 int host(int argc, char *argv[])
32 int host_number = xbt_str_parse_int(MSG_process_get_name(MSG_process_self()), "Process name must be an integer but is: %s");
34 msg_task_t task = NULL;
35 XBT_ATTRIB_UNUSED int res;
36 if (host_number == 0){ //master send then receive
37 sprintf(mailbox, "%d", host_number+1);
38 task = MSG_task_create("Token", task_comp_size, task_comm_size, NULL);
39 XBT_INFO("Host \"%d\" send '%s' to Host \"%s\"",host_number,task->name,mailbox);
40 MSG_task_send(task, mailbox);
42 res = MSG_task_receive(&(task), MSG_process_get_name(MSG_process_self()));
43 xbt_assert(res == MSG_OK, "MSG_task_get failed");
44 XBT_INFO("Host \"%d\" received \"%s\"",host_number, MSG_task_get_name(task));
45 MSG_task_destroy(task);
47 else{ //slave receive then send
48 res = MSG_task_receive(&(task), MSG_process_get_name(MSG_process_self()));
49 xbt_assert(res == MSG_OK, "MSG_task_get failed");
50 XBT_INFO("Host \"%d\" received \"%s\"",host_number, MSG_task_get_name(task));
52 if(host_number+1 == nb_hosts)
53 sprintf(mailbox, "0");
55 sprintf(mailbox, "%d", host_number+1);
56 XBT_INFO("Host \"%d\" send '%s' to Host \"%s\"",host_number,task->name,mailbox);
57 MSG_task_send(task, mailbox);
62 int main(int argc, char **argv)
65 MSG_init(&argc, argv);
66 MSG_create_environment(argv[1]);
67 xbt_dynar_t hosts = MSG_hosts_as_dynar();
68 nb_hosts = xbt_dynar_length(hosts);
69 MSG_function_register("host", host);
71 XBT_INFO("Number of host '%d'",nb_hosts);
72 for(i = 0 ; i<nb_hosts; i++)
74 char* name_host = bprintf("%d",i);
75 MSG_process_create( name_host, host, NULL, xbt_dynar_get_as(hosts,i,msg_host_t) );
78 xbt_dynar_free(&hosts);
81 XBT_INFO("Simulation time %g", MSG_get_clock());