1 /* Copyright (c) 2010-2023. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 /* This example shows how to use simgrid::s4u::this_actor::wait() to wait for a given communication.
8 * As for the other asynchronous examples, the sender initiate all the messages it wants to send and
9 * pack the resulting simgrid::s4u::CommPtr objects in a vector. All messages thus occurs concurrently.
11 * The sender then loops until there is no ongoing communication.
14 #include "simgrid/s4u.hpp"
18 namespace sg4 = simgrid::s4u;
20 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_comm_wait, "Messages specific for this s4u example");
22 static void sender(int messages_count, size_t payload_size)
24 double sleep_start_time = 5.0;
25 double sleep_test_time = 0;
27 sg4::Mailbox* mbox = sg4::Mailbox::by_name("receiver");
29 XBT_INFO("sleep_start_time : %f , sleep_test_time : %f", sleep_start_time, sleep_test_time);
30 sg4::this_actor::sleep_for(sleep_start_time);
32 for (int i = 0; i < messages_count; i++) {
33 std::string msg_content = "Message " + std::to_string(i);
34 // Copy the data we send: the 'msg_content' variable is not a stable storage location.
35 // It will be destroyed when this actor leaves the loop, ie before the receiver gets the data
36 auto* payload = new std::string(msg_content);
38 /* Create a communication representing the ongoing communication and then */
39 sg4::CommPtr comm = mbox->put_async(payload, payload_size);
40 XBT_INFO("Send '%s' to '%s'", msg_content.c_str(), mbox->get_cname());
42 if (sleep_test_time > 0) { /* - "test_time" is set to 0, wait */
43 while (not comm->test()) { /* - Call test() every "sleep_test_time" otherwise */
44 sg4::this_actor::sleep_for(sleep_test_time);
51 /* Send message to let the receiver know that it should stop */
52 XBT_INFO("Send 'finalize' to 'receiver'");
53 mbox->put(new std::string("finalize"), 0);
56 /* Receiver actor expects 1 argument: its ID */
57 static void receiver()
59 double sleep_start_time = 1.0;
60 double sleep_test_time = 0.1;
62 sg4::Mailbox* mbox = sg4::Mailbox::by_name("receiver");
64 XBT_INFO("sleep_start_time : %f , sleep_test_time : %f", sleep_start_time, sleep_test_time);
65 sg4::this_actor::sleep_for(sleep_start_time);
67 XBT_INFO("Wait for my first message");
68 for (bool cont = true; cont;) {
69 std::string* received;
70 sg4::CommPtr comm = mbox->get_async<std::string>(&received);
72 if (sleep_test_time > 0) { /* - "test_time" is set to 0, wait */
73 while (not comm->test()) { /* - Call test() every "sleep_test_time" otherwise */
74 sg4::this_actor::sleep_for(sleep_test_time);
80 XBT_INFO("I got a '%s'.", received->c_str());
81 if (*received == "finalize")
82 cont = false; // If it's a finalize message, we're done.
87 int main(int argc, char* argv[])
89 sg4::Engine e(&argc, argv);
91 e.load_platform(argv[1]);
93 sg4::Actor::create("sender", e.host_by_name("Tremblay"), sender, 3, 482117300);
94 sg4::Actor::create("receiver", e.host_by_name("Ruby"), receiver);