SimGrid  3.16
Versatile Simulation of Distributed Systems
examples/msg/trace-process-migration/trace-process-migration.c
/* Copyright (c) 2010-2016. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "simgrid/msg.h"
/* The guy we will move from host to host. It move alone and then is moved by policeman back */
static int emigrant(int argc, char *argv[])
{
msg_task_t task = NULL;
char *destination = NULL;
while (1){ // I am an eternal emigrant
MSG_task_receive(&(task), "master_mailbox");
destination = (char*)MSG_task_get_data (task);
if (destination == NULL)
break; //there is no destination, die
MSG_process_sleep(2); // I am tired, have to sleep for 2 seconds
free (destination);
task = NULL;
}
return 0;
}
static int policeman(int argc, char *argv[])
{
// I am the master of emigrant process,
// I tell it where it must emigrate to.
xbt_dynar_t destinations = xbt_dynar_new (sizeof(char*), &xbt_free_ref);
xbt_dynar_push_as (destinations, char*, xbt_strdup ("Tremblay"));
xbt_dynar_push_as (destinations, char*, xbt_strdup ("Jupiter"));
xbt_dynar_push_as (destinations, char*, xbt_strdup ("Fafard"));
xbt_dynar_push_as (destinations, char*, xbt_strdup ("Ginette"));
xbt_dynar_push_as (destinations, char*, xbt_strdup ("Bourassa"));
xbt_dynar_push_as (destinations, char*, xbt_strdup ("Fafard"));
xbt_dynar_push_as (destinations, char*, xbt_strdup ("Tremblay"));
xbt_dynar_push_as (destinations, char*, xbt_strdup ("Ginette"));
xbt_dynar_push_as (destinations, char*, NULL);
char *destination;
unsigned int i;
xbt_dynar_foreach(destinations, i, destination){
msg_task_t task = MSG_task_create("task", 0, 0, NULL);
if (destination != NULL){
MSG_task_set_data(task, xbt_strdup (destination));
}
MSG_task_set_category(task, "migration_order");
MSG_task_send (task, "master_mailbox");
}
xbt_dynar_free (&destinations);
return 0;
}
int main(int argc, char *argv[])
{
MSG_init(&argc, argv);
xbt_assert(argc > 1, "Usage: %s platform_file\n\tExample: %s msg_platform.xml\n", argv[0], argv[0]);
TRACE_category ("migration_order");
MSG_process_create("emigrant", emigrant, NULL, MSG_get_host_by_name("Fafard"));
MSG_process_create("policeman", policeman, NULL, MSG_get_host_by_name("Tremblay"));
return 0;
}