SimGrid  3.18
Versatile Simulation of Distributed Systems
examples/s4u/dht-chord/s4u-dht-chord.cpp
/* Copyright (c) 2010-2017. 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 "s4u-dht-chord.hpp"
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_chord, "Messages specific for this s4u example");
int nb_bits = 24;
int nb_keys = 0;
int timeout = 50;
int* powers2 = nullptr;
/* Global initialization of the Chord simulation. */
static void chord_init()
{
// compute the powers of 2 once for all
powers2 = new int[nb_bits];
int pow = 1;
for (int i = 0; i < nb_bits; i++) {
powers2[i] = pow;
pow = pow << 1;
}
nb_keys = pow;
XBT_DEBUG("Sets nb_keys to %d", nb_keys);
HostChord::EXTENSION_ID = simgrid::s4u::Host::extension_create<HostChord>();
std::vector<simgrid::s4u::Host*> list;
for (auto const& host : list)
host->extension_set(new HostChord(host));
}
static void chord_exit()
{
delete[] powers2;
}
int main(int argc, char* argv[])
{
simgrid::s4u::Engine e(&argc, argv);
xbt_assert(argc > 2, "Usage: %s [-nb_bits=n] [-timeout=t] platform_file deployment_file\n"
"\tExample: %s ../msg_platform.xml chord.xml\n",
argv[0], argv[0]);
char** options = &argv[1];
while (not strncmp(options[0], "-", 1)) {
unsigned int length = strlen("-nb_bits=");
if (not strncmp(options[0], "-nb_bits=", length) && strlen(options[0]) > length) {
nb_bits = xbt_str_parse_int(options[0] + length, "Invalid nb_bits parameter: %s");
XBT_DEBUG("Set nb_bits to %d", nb_bits);
} else {
length = strlen("-timeout=");
if (not strncmp(options[0], "-timeout=", length) && strlen(options[0]) > length) {
timeout = xbt_str_parse_int(options[0] + length, "Invalid timeout parameter: %s");
XBT_DEBUG("Set timeout to %d", timeout);
} else {
xbt_die("Invalid chord option '%s'", options[0]);
}
}
options++;
}
e.loadPlatform(options[0]);
chord_init();
e.registerFunction<Node>("node");
e.loadDeployment(options[1]);
e.run();
XBT_INFO("Simulated time: %g", e.getClock());
chord_exit();
return 0;
}