-/* $Id$ */
-
-/* Copyright (c) 2009 The SimGrid team. All rights reserved. */
+/* Copyright (c) 2009-2015. 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 "msg/msg.h" /* core library */
-#include "xbt/sysdep.h" /* calloc */
+#include "simgrid/msg.h"
+#include "xbt/synchro_core.h"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
-/* Create a log channel to have nice outputs. */
-#include "xbt/log.h"
-XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test,"Messages specific for this msg example");
+/** @addtogroup MSG_examples
+ *
+ * - <b>migration/migration.c</b> Demonstrates how to use the @ref MSG_process_migrate function to let processes
+ * change the host they run on after their start.
+ */
+
+xbt_mutex_t mutex = NULL;
+xbt_cond_t cond = NULL;
+static msg_process_t process_to_migrate = NULL;
/** 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[])
{
- m_task_t task;
- INFO0("I'll look for a new job on another machine where the grass is greener.");
- MSG_process_change_host(MSG_get_host_by_name("Boivin"));
- INFO0("Yeah, found something to do");
- task = MSG_task_create("job",98095000,0,NULL);
+ msg_task_t task;
+ XBT_INFO("I'll look for a new job on another machine where the grass is greener.");
+ MSG_process_migrate(MSG_process_self(), MSG_host_by_name("Boivin"));
+
+ XBT_INFO("Yeah, found something to do");
+ task = MSG_task_create("job", 98095000, 0, NULL);
MSG_task_execute(task);
MSG_task_destroy(task);
- INFO0("Moving back home after work");
- MSG_process_change_host(MSG_get_host_by_name("Jacquelin"));
- INFO0("Uh, nothing to do here. Stopping now");
+ MSG_process_sleep(2);
+ XBT_INFO("Moving back home after work");
+ MSG_process_migrate(MSG_process_self(), MSG_host_by_name("Jacquelin"));
+ MSG_process_migrate(MSG_process_self(), MSG_host_by_name("Boivin"));
+ MSG_process_sleep(4);
+ xbt_mutex_acquire(mutex);
+ process_to_migrate = MSG_process_self();
+ xbt_cond_broadcast(cond);
+ xbt_mutex_release(mutex);
+ 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));
+ XBT_INFO("Uh, nothing to do here. Stopping now");
return 0;
-} /* end_of_emigrant */
+}
-/* This function would move the emigrant back home, if it were possible to do so in the MSG API.
- * Nothing for now.
- */
+/* This function move the emigrant on Jacquelin */
static int policeman(int argc, char *argv[])
{
- INFO0("No function in the API to move the emigrant back, so do nothing.");
- return 0;
-} /* end_of_policeman */
+ xbt_mutex_acquire(mutex);
+ XBT_INFO("Wait a bit before migrating the emigrant.");
+ while (process_to_migrate == NULL) xbt_cond_wait(cond, mutex);
+ MSG_process_migrate(process_to_migrate, MSG_host_by_name("Jacquelin"));
+ XBT_INFO("I moved the emigrant");
+ MSG_process_resume(process_to_migrate);
+ xbt_mutex_release(mutex);
+ return 0;
+}
-/** Main function */
-int main(int argc, char *argv[]) {
- MSG_error_t res = MSG_OK;
+int main(int argc, char *argv[])
+{
+ msg_error_t res = MSG_OK;
- /* Argument checking */
- MSG_global_init(&argc,argv);
- if (argc < 3) {
- CRITICAL1 ("Usage: %s platform_file deployment_file\n",argv[0]);
- CRITICAL1 ("example: %s msg_platform.xml msg_deployment_suspend.xml\n",argv[0]);
- exit(1);
- }
+ MSG_init(&argc, argv);
+ xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
+ "\tExample: %s msg_platform.xml msg_deployment_suspend.xml\n", argv[0], argv[0]);
- /* Simulation setting */
MSG_create_environment(argv[1]);
- /* Application deployment */
MSG_function_register("emigrant", emigrant);
+ MSG_function_register("policeman", policeman);
MSG_launch_application(argv[2]);
- /* Run the simulation */
+ mutex = xbt_mutex_init();
+ cond = xbt_cond_init();
res = MSG_main();
- INFO1("Simulation time %g",MSG_get_clock());
- if (res==MSG_OK)
- res = MSG_clean();
+ XBT_INFO("Simulation time %g", MSG_get_clock());
+ xbt_cond_destroy(cond);
+ xbt_mutex_destroy(mutex);
- if(res==MSG_OK)
- return 0;
- else
- return 1;
-} /* end_of_main */
+ return res != MSG_OK;
+}
