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/* Copyright (c) 2006-2025. 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 <mutex> /* std::mutex and std::scoped_lock */
#include <simgrid/s4u.hpp> /* All of S4U */
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "a sample log category");
namespace sg4 = simgrid::s4u;
static void worker_fun(sg4::ConditionVariablePtr cv, sg4::MutexPtr mutex, std::string& data, bool& done)
{
const std::scoped_lock lock(*mutex);
XBT_INFO("Start processing data which is '%s'.", data.c_str());
data += " after processing";
// Send data back to main()
XBT_INFO("Signal to master that the data processing is completed, and exit.");
done = true;
cv->notify_one();
}
static void master_fun()
{
auto mutex = sg4::Mutex::create();
auto cv = sg4::ConditionVariable::create();
std::string data = "Example data";
bool done = false;
auto worker =
sg4::Host::by_name("Jupiter")->add_actor("worker", worker_fun, cv, mutex, std::ref(data), std::ref(done));
// wait for the worker
cv->wait(std::unique_lock(*mutex), [&done]() { return done; });
XBT_INFO("data is now '%s'.", data.c_str());
worker->join();
}
int main(int argc, char** argv)
{
sg4::Engine e(&argc, argv);
e.load_platform("../../platforms/two_hosts.xml");
e.host_by_name("Tremblay")->add_actor("main", master_fun);
e.run();
return 0;
}
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