-/* Copyright (c) 2016-2019. The SimGrid Team. All rights reserved. */
+/* 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 <random>
#include <string>
+#include <xbt/random.hpp>
#include <xbt/str.h>
constexpr double MAX_SIMULATION_TIME = 1000;
extern int nb_keys;
extern int timeout;
-extern std::default_random_engine generator;
-
/* Types of tasks exchanged between nodes. */
enum e_message_type_t {
FIND_SUCCESSOR,
class ChordMessage {
public:
e_message_type_t type; // type of message
- std::string issuer_host_name; // used for logging
+ 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), issuer_host_name(simgrid::s4u::this_actor::get_host()->get_name())
- {
- }
+ explicit ChordMessage(e_message_type_t type) : type(type) {}
static void destroy(void* message);
};
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()
int remoteFindSuccessor(int ask_to, int id);
void notify(int predecessor_candidate_id);
- void remoteNotify(int notify_id, int predecessor_candidate_id);
+ void remoteNotify(int notify_id, int predecessor_candidate_id) const;
void stabilize();
void handleMessage(ChordMessage* message);
- void operator()()
- {
- simgrid::s4u::this_actor::sleep_for(start_time_);
- if (known_id_ == -1) {
- setPredecessor(-1); // -1 means that I have no predecessor
- printFingerTable();
- joined = true;
- } else {
- join(known_id_);
- }
-
- if (not joined)
- return;
- void* data = nullptr;
- double now = simgrid::s4u::Engine::get_clock();
- double next_stabilize_date = start_time_ + PERIODIC_STABILIZE_DELAY;
- double next_fix_fingers_date = start_time_ + PERIODIC_FIX_FINGERS_DELAY;
- double next_check_predecessor_date = start_time_ + PERIODIC_CHECK_PREDECESSOR_DELAY;
- double next_lookup_date = start_time_ + PERIODIC_LOOKUP_DELAY;
- simgrid::s4u::CommPtr comm_receive = nullptr;
- while ((now < (start_time_ + deadline_)) && now < MAX_SIMULATION_TIME) {
- if (comm_receive == nullptr)
- comm_receive = mailbox_->get_async(&data);
- while ((now < (start_time_ + deadline_)) && now < MAX_SIMULATION_TIME && not comm_receive->test()) {
- // no task was received: make some periodic calls
- if (now >= next_stabilize_date) {
- stabilize();
- next_stabilize_date = simgrid::s4u::Engine::get_clock() + PERIODIC_STABILIZE_DELAY;
- } else if (now >= next_fix_fingers_date) {
- fixFingers();
- next_fix_fingers_date = simgrid::s4u::Engine::get_clock() + PERIODIC_FIX_FINGERS_DELAY;
- } else if (now >= next_check_predecessor_date) {
- checkPredecessor();
- next_check_predecessor_date = simgrid::s4u::Engine::get_clock() + PERIODIC_CHECK_PREDECESSOR_DELAY;
- } else if (now >= next_lookup_date) {
- randomLookup();
- next_lookup_date = simgrid::s4u::Engine::get_clock() + PERIODIC_LOOKUP_DELAY;
- } else {
- // nothing to do: sleep for a while
- simgrid::s4u::this_actor::sleep_for(SLEEP_DELAY);
- }
- now = simgrid::s4u::Engine::get_clock();
- }
-
- if (data != nullptr) {
- ChordMessage* message = static_cast<ChordMessage*>(data);
- handleMessage(message);
- comm_receive = nullptr;
- data = nullptr;
- }
- now = simgrid::s4u::Engine::get_clock();
- }
- if (comm_receive != nullptr) {
- if (comm_receive->test())
- delete static_cast<ChordMessage*>(data);
- else
- comm_receive->cancel();
- }
- // leave the ring
- leave();
- }
+ void operator()();
};
#endif