--- /dev/null
+/* 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/plugins/file_system.h>
+#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);
+ sg_storage_file_system_init();
+ e.load_platform(argv[1]);
+
+ auto bob = e.host_by_name("bob");
+ auto carl = e.host_by_name("carl");
+
+ // Display the details on vetoed activities
+ simgrid::s4u::Activity::on_veto.connect([](simgrid::s4u::Activity& a) {
+ XBT_INFO("Activity '%s' vetoed. Dependencies: %s; Ressources: %s", a.get_cname(),
+ (a.dependencies_solved() ? "solved" : "NOT solved"), (a.is_assigned() ? "assigned" : "NOT assigned"));
+ });
+
+ simgrid::s4u::Exec::on_completion.connect([](simgrid::s4u::Exec const& exec) {
+ XBT_INFO("Activity '%s' is complete (start time: %f, finish time: %f)", exec.get_cname(), exec.get_start_time(),
+ exec.get_finish_time());
+ });
+
+ // Create a small DAG: parent->write_output->read_input->child
+ simgrid::s4u::ExecPtr parent = simgrid::s4u::Exec::init();
+ simgrid::s4u::IoPtr write_output = simgrid::s4u::Io::init();
+ simgrid::s4u::IoPtr read_input = simgrid::s4u::Io::init();
+ simgrid::s4u::ExecPtr child = simgrid::s4u::Exec::init();
+ parent->add_successor(write_output);
+ write_output->add_successor(read_input);
+ read_input->add_successor(child);
+
+ // Set the parameters (the name is for logging purposes only)
+ // + parent and chile end after 1 second
+ parent->set_name("parent")->set_flops_amount(bob->get_speed());
+ write_output->set_name("write")->set_size(1e9)->set_op_type(simgrid::s4u::Io::OpType::WRITE);
+ read_input->set_name("read")->set_size(1e9)->set_op_type(simgrid::s4u::Io::OpType::READ);
+ child->set_name("child")->set_flops_amount(carl->get_speed());
+
+ // Schedule and try to start the different activities
+ parent->set_host(bob)->vetoable_start();
+ write_output->set_disk(bob->get_disks().front())->vetoable_start();
+ read_input->set_disk(carl->get_disks().front())->vetoable_start();
+ child->set_host(carl)->vetoable_start();
+
+ e.run();
+
+ XBT_INFO("Simulation time %g", simgrid::s4u::Engine::get_clock());
+
+ return 0;
+}
--- /dev/null
+#!/usr/bin/env tesh
+
+$ ${bindir:=.}/s4u-dag-io ${platfdir}/hosts_with_disks.xml --log=s4u_activity.t:verbose "--log=root.fmt:[%10.6r]%e(%i:%a@%h)%e%m%n"
+> [ 0.000000] (0:maestro@) 'parent' is assigned to a resource and all dependencies are solved. Let's start
+> [ 0.000000] (0:maestro@) Activity 'write' vetoed. Dependencies: NOT solved; Ressources: assigned
+> [ 0.000000] (0:maestro@) Activity 'read' vetoed. Dependencies: NOT solved; Ressources: assigned
+> [ 0.000000] (0:maestro@) Activity 'child' vetoed. Dependencies: NOT solved; Ressources: assigned
+> [ 1.000000] (0:maestro@) Remove a dependency from 'parent' on 'write'
+> [ 1.000000] (0:maestro@) 'write' is assigned to a resource and all dependencies are solved. Let's start
+> [ 1.000000] (0:maestro@) Activity 'parent' is complete (start time: 0.000000, finish time: 1.000000)
+> [ 26.000000] (0:maestro@) Remove a dependency from 'write' on 'read'
+> [ 26.000000] (0:maestro@) 'read' is assigned to a resource and all dependencies are solved. Let's start
+> [ 36.000000] (0:maestro@) Remove a dependency from 'read' on 'child'
+> [ 36.000000] (0:maestro@) 'child' is assigned to a resource and all dependencies are solved. Let's start
+> [ 37.000000] (0:maestro@) Activity 'child' is complete (start time: 36.000000, finish time: 37.000000)
+> [ 37.000000] (0:maestro@) Simulation time 37