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/* Copyright (c) 2007-2025. 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"
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "Messages specific for this s4u example");
namespace sg4 = simgrid::s4u;
/* This actor simply starts an activity in a fire and forget (a.k.a. detached) mode and quit.*/
static void detached()
{
double computation_amount = sg4::this_actor::get_host()->get_speed();
XBT_INFO("Execute %g flops, should take 1 second.", computation_amount);
sg4::ExecPtr activity = sg4::this_actor::exec_init(computation_amount);
// Attach a callback to print some log when the detached activity completes
activity->on_this_completion_cb([](sg4::Exec const&) {
XBT_INFO("Detached activity is done");
});
activity->detach();
XBT_INFO("Goodbye now!");
}
/* This actor simply waits for its activity completion after starting it.
* That's exactly equivalent to synchronous execution. */
static void waiter()
{
double computation_amount = sg4::this_actor::get_host()->get_speed();
XBT_INFO("Execute %g flops, should take 1 second.", computation_amount);
sg4::ExecPtr activity = sg4::this_actor::exec_init(computation_amount);
activity->start();
activity->wait();
XBT_INFO("Goodbye now!");
}
/* This actor tests the ongoing execution until its completion, and don't wait before it's terminated. */
static void monitor()
{
double computation_amount = sg4::this_actor::get_host()->get_speed();
XBT_INFO("Execute %g flops, should take 1 second.", computation_amount);
sg4::ExecPtr activity = sg4::this_actor::exec_init(computation_amount);
activity->start();
while (not activity->test()) {
XBT_INFO("Remaining amount of flops: %g (%.0f%%)", activity->get_remaining(),
100 * activity->get_remaining_ratio());
sg4::this_actor::sleep_for(0.3);
}
XBT_INFO("Goodbye now!");
}
/* This actor cancels the ongoing execution after a while. */
static void canceller()
{
double computation_amount = sg4::this_actor::get_host()->get_speed();
XBT_INFO("Execute %g flops, should take 1 second.", computation_amount);
sg4::ExecPtr activity = sg4::this_actor::exec_async(computation_amount);
sg4::this_actor::sleep_for(0.5);
XBT_INFO("I changed my mind, cancel!");
activity->cancel();
XBT_INFO("Goodbye now!");
}
int main(int argc, char* argv[])
{
sg4::Engine e(&argc, argv);
e.load_platform(argv[1]);
sg4::Host* fafard = e.host_by_name("Fafard");
sg4::Host* ginette = e.host_by_name("Ginette");
sg4::Host* boivin = e.host_by_name("Boivin");
sg4::Host* tremblay = e.host_by_name("Tremblay");
e.add_actor("wait", fafard, waiter);
e.add_actor("monitor", ginette, monitor);
e.add_actor("cancel", boivin, canceller);
e.add_actor("detach", tremblay, detached);
e.run();
XBT_INFO("Simulation time %g", sg4::Engine::get_clock());
return 0;
}
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