+++ /dev/null
-/* Copyright (c) 2012-2015. 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 "tracker.h"
-#include <simgrid/msg.h>
-#include <xbt/RngStream.h>
-
-static void task_free(void *data);
-
-XBT_LOG_NEW_DEFAULT_CATEGORY(msg_tracker, "Messages specific for the tracker");
-/**
- * Tracker main function
- * @param argc number of arguments
- * @param argv arguments
- */
-int tracker(int argc, char *argv[])
-{
- int i;
-
- RngStream stream = (RngStream) MSG_host_get_property_value(MSG_host_self(), "stream");
- //Checking arguments
- xbt_assert(argc == 2, "Wrong number of arguments for the tracker.");
- //Retrieving end time
- double deadline = xbt_str_parse_double(argv[1],"Invalid deadline: %s");
- xbt_assert(deadline > 0, "Wrong deadline supplied");
- //Building peers array
- xbt_dynar_t peers_list = xbt_dynar_new(sizeof(int), NULL);
-
- XBT_INFO("Tracker launched.");
-
- msg_comm_t comm_received = NULL;
- msg_task_t task_received = NULL;
-
- while (MSG_get_clock() < deadline) {
- if (comm_received == NULL) {
- comm_received = MSG_task_irecv(&task_received, TRACKER_MAILBOX);
- }
- if (MSG_comm_test(comm_received)) {
- //Check for correct status
- if (MSG_comm_get_status(comm_received) == MSG_OK) {
- //Retrieve the data sent by the peer.
- tracker_task_data_t data = MSG_task_get_data(task_received);
- //Add the peer to our peer list.
- if (!is_in_list(peers_list, data->peer_id)) {
- xbt_dynar_push_as(peers_list, int, data->peer_id);
- }
- //Sending peers to the peer
- int next_peer;
- int peers_length = xbt_dynar_length(peers_list);
- for (i = 0; i < MAXIMUM_PAIRS && i < peers_length; i++) {
- do {
- next_peer =
- xbt_dynar_get_as(peers_list,
- RngStream_RandInt(stream, 0, peers_length - 1),
- int);
- } while (is_in_list(data->peers, next_peer));
- xbt_dynar_push_as(data->peers, int, next_peer);
- }
- //setting the interval
- data->interval = TRACKER_QUERY_INTERVAL;
- //sending the task back to the peer.
- MSG_task_dsend(task_received, data->mailbox, task_free);
- //destroy the communication.
- }
- MSG_comm_destroy(comm_received);
- comm_received = NULL;
- task_received = NULL;
- } else {
- MSG_process_sleep(1);
- }
- }
- //Free the remaining communication if any
- if (comm_received) {
- MSG_comm_destroy(comm_received);
- }
- //Free the peers list
- xbt_dynar_free(&peers_list);
-
- XBT_INFO("Tracker is leaving");
-
- return 0;
-}
-
-/**
- * Build a new task for the tracker.
- * @param issuer_host_name Hostname of the issuer. For debugging purposes
- */
-tracker_task_data_t tracker_task_data_new(const char *issuer_host_name,
- const char *mailbox, int peer_id,
- int uploaded, int downloaded,
- int left)
-{
- tracker_task_data_t task = xbt_new(s_tracker_task_data_t, 1);
-
- task->type = TRACKER_TASK_QUERY;
- task->issuer_host_name = issuer_host_name;
- task->mailbox = mailbox;
- task->peer_id = peer_id;
- task->uploaded = uploaded;
- task->downloaded = downloaded;
- task->left = left;
-
- task->peers = xbt_dynar_new(sizeof(int), NULL);
-
- return task;
-}
-
-/**
- * Free a tracker task that has not succefully been sent.
- * @param data Task to free
- */
-static void task_free(void *data)
-{
- tracker_task_data_t task_data = MSG_task_get_data(data);
- tracker_task_data_free(task_data);
- MSG_task_destroy(data);
-}
-
-/**
- * Free the data structure of a tracker task.
- * @param task data to free
- */
-void tracker_task_data_free(tracker_task_data_t task)
-{
- xbt_dynar_free(&task->peers);
- xbt_free(task);
-}
-
-/**
- * Returns if the given id is in the peers lsit
- * @param peers dynar containing the peers
- * @param id identifier of the peer to test
- */
-int is_in_list(xbt_dynar_t peers, int id)
-{
- unsigned i;
- int elm;
- xbt_dynar_foreach(peers, i, elm) {
- if (elm == id) {
- return 1;
- }
- }
- return 0;
-}
