-/* Copyright (c) 2009-2016. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2009-2017. 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"
-#include "xbt/synchro.h"
XBT_LOG_NEW_DEFAULT_CATEGORY(msg_process_migration, "Messages specific for this msg example");
-xbt_mutex_t checkpoint = NULL;
-xbt_cond_t identification = NULL;
+msg_bar_t barrier;
static msg_process_t controlled_process = NULL;
/* The Emigrant process will be moved from host to host. */
MSG_process_migrate(MSG_process_self(), MSG_host_by_name("Jacquelin")); /* - Move back to original location */
MSG_process_migrate(MSG_process_self(), MSG_host_by_name("Boivin")); /* - Go back to the other host to sleep*/
MSG_process_sleep(4);
- xbt_mutex_acquire(checkpoint); /* - Get controlled at checkpoint */
- controlled_process = MSG_process_self(); /* - and get moved back by the policeman process */
- xbt_cond_broadcast(identification);
- xbt_mutex_release(checkpoint);
+ controlled_process = MSG_process_self(); /* - Get controlled at checkpoint */
+ MSG_barrier_wait(barrier);
MSG_process_suspend(MSG_process_self());
msg_host_t h = MSG_process_get_host(MSG_process_self());
XBT_INFO("I've been moved on this new host: %s", MSG_host_get_name(h));
/* The policeman check for emigrants and move them back to 'Jacquelin' */
static int policeman(int argc, char *argv[])
{
- xbt_mutex_acquire(checkpoint);
XBT_INFO("Wait at the checkpoint."); /* - block on the mutex+condition */
- while (controlled_process == NULL) xbt_cond_wait(identification, checkpoint);
+ MSG_barrier_wait(barrier);
MSG_process_migrate(controlled_process, MSG_host_by_name("Jacquelin")); /* - Move an emigrant to Jacquelin */
XBT_INFO("I moved the emigrant");
MSG_process_resume(controlled_process);
- xbt_mutex_release(checkpoint);
return 0;
}
MSG_process_create("emigrant", emigrant, NULL, MSG_get_host_by_name("Jacquelin"));
MSG_process_create("policeman", policeman, NULL, MSG_get_host_by_name("Boivin"));
- checkpoint = xbt_mutex_init(); /* - Initiate the mutex and conditions */
- identification = xbt_cond_init();
+ barrier = MSG_barrier_init(2);
msg_error_t res = MSG_main(); /* - Run the simulation */
XBT_INFO("Simulation time %g", MSG_get_clock());
- xbt_cond_destroy(identification);
- xbt_mutex_destroy(checkpoint);
+ MSG_barrier_destroy(barrier);
return res != MSG_OK;
}