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/* Copyright (c) 2010-2025. 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. */
/* This example shows how to use simgrid::s4u::Activity::wait_until() and
* simgrid::s4u::Activity::wait_for() on a given communication.
*
* It is very similar to the comm-wait example, but the sender initially
* does some waits that are too short before doing an infinite wait.
*/
#include "simgrid/s4u.hpp"
#include <cstdlib>
#include <iostream>
#include <string>
namespace sg4 = simgrid::s4u;
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_comm_waituntil, "Messages specific for this s4u example");
static void sender(int messages_count, size_t payload_size)
{
std::vector<sg4::CommPtr> pending_comms;
sg4::Mailbox* mbox = sg4::Mailbox::by_name("receiver-0");
/* Start dispatching all messages to the receiver */
for (int i = 0; i < messages_count; i++) {
std::string message = "Message " + std::to_string(i);
auto* payload = new std::string(message); // copy the data we send:
// 'msgName' is not a stable storage location
XBT_INFO("Send '%s' to '%s'", message.c_str(), mbox->get_cname());
/* Create a communication representing the ongoing communication */
sg4::CommPtr comm = mbox->put_async(payload, payload_size);
/* Add this comm to the vector of all known comms */
pending_comms.push_back(comm);
}
/* Start the finalize signal to the receiver*/
auto* payload = new std::string("finalize"); // Make a copy of the data we will send
sg4::CommPtr final_comm = mbox->put_async(payload, 0);
pending_comms.push_back(final_comm);
XBT_INFO("Send 'finalize' to 'receiver-0'");
XBT_INFO("Done dispatching all messages");
/* Now that all message exchanges were initiated, wait for their completion, in order of creation. */
while (not pending_comms.empty()) {
sg4::CommPtr comm = pending_comms.back();
comm->wait_for(1);
pending_comms.pop_back(); // remove it from the list
}
XBT_INFO("Goodbye now!");
}
static void receiver()
{
sg4::Mailbox* mbox = sg4::Mailbox::by_name("receiver-0");
XBT_INFO("Wait for my first message");
for (bool cont = true; cont;) {
auto received = mbox->get_unique<std::string>();
XBT_INFO("I got a '%s'.", received->c_str());
if (*received == "finalize")
cont = false; // If it's a finalize message, we're done.
}
}
int main(int argc, char* argv[])
{
sg4::Engine e(&argc, argv);
e.load_platform(argv[1]);
e.add_actor("sender", e.host_by_name("Tremblay"), sender, 3, 5e7);
e.add_actor("receiver", e.host_by_name("Ruby"), receiver);
e.run();
return 0;
}
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