+/* Copyright (c) 2007-2021. 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/s4u.hpp"
+#include <vector>
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "Messages specific for this s4u example");
+
+int main(int argc, char* argv[])
+{
+ simgrid::s4u::Engine e(&argc, argv);
+ e.load_platform(argv[1]);
+ std::set<simgrid::s4u::Activity*> vetoed;
+ e.track_vetoed_activities(&vetoed);
+
+ auto fafard = e.host_by_name("Fafard");
+
+ // Display the details on vetoed activities
+ simgrid::s4u::Activity::on_veto.connect([&e](simgrid::s4u::Activity& a) {
+ auto& exec = static_cast<simgrid::s4u::Exec&>(a); // all activities are execs in this example
+
+ XBT_INFO("Activity '%s' vetoed. Dependencies: %s; Ressources: %s", exec.get_cname(),
+ (exec.dependencies_solved() ? "solved" : "NOT solved"),
+ (exec.is_assigned() ? "assigned" : "NOT assigned"));
+ });
+
+ // Define an amount of work that should take 1 second to execute.
+ double computation_amount = fafard->get_speed();
+
+ // Create a small DAG: Two parents and a child
+ simgrid::s4u::ExecPtr first_parent = simgrid::s4u::Exec::init();
+ simgrid::s4u::ExecPtr second_parent = simgrid::s4u::Exec::init();
+ simgrid::s4u::ExecPtr child = simgrid::s4u::Exec::init();
+ first_parent->add_successor(child);
+ second_parent->add_successor(child);
+
+ /*
+ std::vector<simgrid::s4u::ExecPtr> pending_execs;
+ pending_execs.push_back(first_parent);
+ pending_execs.push_back(second_parent);
+ pending_execs.push_back(child);
+ */
+
+ // Set the parameters (the name is for logging purposes only)
+ // + First parent ends after 1 second and the Second parent after 2 seconds.
+ first_parent->set_name("parent 1")->set_flops_amount(computation_amount);
+ second_parent->set_name("parent 2")->set_flops_amount(2 * computation_amount);
+ child->set_name("child")->set_flops_amount(computation_amount);
+
+ // Only the parents are scheduled so far
+ first_parent->set_host(fafard);
+ second_parent->set_host(fafard);
+
+ // Start all activities that can actually start.
+ first_parent->vetoable_start();
+ second_parent->vetoable_start();
+ child->vetoable_start();
+
+ while (child->get_state() != simgrid::s4u::Activity::State::FINISHED) {
+ e.run();
+ for (auto* a : vetoed) {
+ auto* exec = static_cast<simgrid::s4u::Exec*>(a);
+
+ // In this simple case, we just assign the child task to a resource when its dependencies are solved
+ if (exec->dependencies_solved() && not exec->is_assigned()) {
+ XBT_INFO("Activity %s's dependencies are resolved. Let's assign it to Fafard.", exec->get_cname());
+ exec->set_host(fafard);
+ } else {
+ XBT_INFO("Activity %s not ready.", exec->get_cname());
+ }
+ }
+ vetoed.clear(); // DON'T FORGET TO CLEAR this set between two calls to run
+ }
+
+ XBT_INFO("Simulation time %g", simgrid::s4u::Engine::get_clock());
+
+ return 0;
+}