--- /dev/null
+/* Copyright (c) 2007-2015. 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 "simgrid/msg.h"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
+
+/** @addtogroup MSG_examples
+ *
+ * - <b>masterslave/masterslave.c: Master/slaves example</b>. This good old example is also very simple. Its
+ * basic version is fully commented on this page: \ref MSG_ex_master_slave, but several variants can be found in the
+ * same directory.
+ */
+
+#define FINALIZE ((void*)221297) /* a magic number to tell people to stop working */
+
+static int master(int argc, char *argv[])
+{
+ msg_host_t *slaves = NULL;
+ msg_task_t *todo = NULL;
+ long slaves_count = 0;
+ int i;
+
+ long number_of_tasks = xbt_str_parse_int(argv[1], "Invalid amount of tasks: %s");
+ double task_comp_size = xbt_str_parse_double(argv[2], "Invalid computational size: %s");
+ double task_comm_size = xbt_str_parse_double(argv[3], "Invalid communication size: %s");
+
+ { /* Task creation */
+ char sprintf_buffer[64];
+
+ todo = xbt_new0(msg_task_t, number_of_tasks);
+
+ for (i = 0; i < number_of_tasks; i++) {
+ sprintf(sprintf_buffer, "Task_%d", i);
+ todo[i] = MSG_task_create(sprintf_buffer, task_comp_size, task_comm_size, NULL);
+ }
+ }
+
+ { /* Process organization */
+ slaves_count = argc - 4;
+ slaves = xbt_new0(msg_host_t, slaves_count);
+
+ for (i = 4; i < argc; i++) {
+ slaves[i - 4] = MSG_host_by_name(argv[i]);
+ xbt_assert(slaves[i - 4] != NULL, "Unknown host %s. Stopping Now! ", argv[i]);
+ }
+ }
+
+ XBT_INFO("Got %ld slaves and %ld tasks to process", slaves_count, number_of_tasks);
+ for (i = 0; i < slaves_count; i++)
+ XBT_DEBUG("%s", MSG_host_get_name(slaves[i]));
+
+ for (i = 0; i < number_of_tasks; i++) {
+ XBT_INFO("Sending \"%s\" to \"%s\"", todo[i]->name, MSG_host_get_name(slaves[i % slaves_count]));
+ if (MSG_host_self() == slaves[i % slaves_count]) {
+ XBT_INFO("Hey ! It's me ! :)");
+ }
+
+ MSG_task_send(todo[i], MSG_host_get_name(slaves[i % slaves_count]));
+ XBT_INFO("Sent");
+ }
+
+ XBT_INFO("All tasks have been dispatched. Let's tell everybody the computation is over.");
+ for (i = 0; i < slaves_count; i++) {
+ msg_task_t finalize = MSG_task_create("finalize", 0, 0, FINALIZE);
+ MSG_task_send(finalize, MSG_host_get_name(slaves[i]));
+ }
+
+ XBT_INFO("Goodbye now!");
+ free(slaves);
+ free(todo);
+ return 0;
+}
+
+static int slave(int argc, char *argv[])
+{
+ msg_task_t task = NULL;
+ XBT_ATTRIB_UNUSED int res;
+ while (1) {
+ res = MSG_task_receive(&(task),MSG_host_get_name(MSG_host_self()));
+ xbt_assert(res == MSG_OK, "MSG_task_get failed");
+
+ XBT_INFO("Received \"%s\"", MSG_task_get_name(task));
+ if (!strcmp(MSG_task_get_name(task), "finalize")) {
+ MSG_task_destroy(task);
+ break;
+ }
+
+ XBT_INFO("Processing \"%s\"", MSG_task_get_name(task));
+ MSG_task_execute(task);
+ XBT_INFO("\"%s\" done", MSG_task_get_name(task));
+ MSG_task_destroy(task);
+ task = NULL;
+ }
+ XBT_INFO("I'm done. See you!");
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ msg_error_t res = MSG_OK;
+
+ MSG_init(&argc, argv);
+ xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n"
+ "\tExample: %s msg_platform.xml msg_deployment.xml\n", argv[0], argv[0]);
+
+ MSG_create_environment(argv[1]);
+
+ MSG_function_register("master", master);
+ MSG_function_register("slave", slave);
+ MSG_launch_application(argv[2]);
+
+ res = MSG_main();
+
+ XBT_INFO("Simulation time %g", MSG_get_clock());
+
+ return res != MSG_OK;
+}
