+++ /dev/null
-/* Copyright (c) 2016-2020. 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. */
-
-#ifndef S4U_CHORD_HPP
-#define S4U_CHORD_HPP
-#include "simgrid/s4u.hpp"
-#include <string>
-#include <xbt/random.hpp>
-#include <xbt/str.h>
-
-constexpr double MAX_SIMULATION_TIME = 1000;
-constexpr double PERIODIC_STABILIZE_DELAY = 20;
-constexpr double PERIODIC_FIX_FINGERS_DELAY = 120;
-constexpr double PERIODIC_CHECK_PREDECESSOR_DELAY = 120;
-constexpr double PERIODIC_LOOKUP_DELAY = 10;
-constexpr double SLEEP_DELAY = 4.9999;
-
-extern int nb_bits;
-extern int nb_keys;
-extern int timeout;
-
-/* Types of tasks exchanged between nodes. */
-enum e_message_type_t {
- FIND_SUCCESSOR,
- FIND_SUCCESSOR_ANSWER,
- GET_PREDECESSOR,
- GET_PREDECESSOR_ANSWER,
- NOTIFY,
- SUCCESSOR_LEAVING,
- PREDECESSOR_LEAVING,
- PREDECESSOR_ALIVE,
- PREDECESSOR_ALIVE_ANSWER
-};
-
-class ChordMessage {
-public:
- e_message_type_t type; // type of message
- std::string issuer_host_name = simgrid::s4u::this_actor::get_host()->get_name(); // used for logging
- int request_id = -1; // id (used by some types of messages)
- int request_finger = 1; // finger parameter (used by some types of messages)
- int answer_id = -1; // answer (used by some types of messages)
- simgrid::s4u::Mailbox* answer_to = nullptr; // mailbox to send an answer to (if any)
-
- explicit ChordMessage(e_message_type_t type) : type(type) {}
-
- static void destroy(void* message);
-};
-
-class Node {
- int known_id_ = -1;
- double start_time_ = -1;
- double deadline_ = -1;
- bool joined = false;
- int id_; // my id
- int pred_id_ = -1; // predecessor id
- simgrid::xbt::random::XbtRandom random; // random number generator for this node
- simgrid::s4u::Mailbox* mailbox_; // my mailbox
- std::vector<int> fingers_; // finger table,(fingers[0] is my successor)
- int next_finger_to_fix; // index of the next finger to fix in fix_fingers()
-
-public:
- explicit Node(std::vector<std::string> args);
- Node(const Node&) = delete;
- Node& operator=(const Node&) = delete;
- void join(int known_id);
- void leave();
- void notifyAndQuit();
-
- void randomLookup();
- void setFinger(int finger_index, int id);
- void fixFingers();
- void printFingerTable();
-
- void setPredecessor(int predecessor_id);
- void checkPredecessor();
- int remoteGetPredecessor(int ask_to);
- int closestPrecedingFinger(int id);
- int findSuccessor(int id);
- int remoteFindSuccessor(int ask_to, int id);
-
- void notify(int predecessor_candidate_id);
- void remoteNotify(int notify_id, int predecessor_candidate_id) const;
- void stabilize();
- void handleMessage(ChordMessage* message);
-
- void operator()();
-};
-
-#endif
