1 /* Copyright (c) 2010-2020. 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"
19 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_async_wait, "Messages specific for this s4u example");
21 static void sender(int argc, char** argv)
23 xbt_assert(argc == 3, "Expecting 2 parameters from the XML deployment file but got %d", argc);
24 long messages_count = std::stol(argv[1]); /* - number of tasks */
25 double msg_size = std::stod(argv[2]); /* - communication cost in bytes */
26 double sleep_start_time = 5.0;
27 double sleep_test_time = 0;
29 simgrid::s4u::Mailbox* mbox = simgrid::s4u::Mailbox::by_name("receiver");
31 XBT_INFO("sleep_start_time : %f , sleep_test_time : %f", sleep_start_time, sleep_test_time);
32 simgrid::s4u::this_actor::sleep_for(sleep_start_time);
34 for (int i = 0; i < messages_count; i++) {
35 std::string msg_content = std::string("Message ") + std::to_string(i);
36 // Copy the data we send: the 'msg_content' variable is not a stable storage location.
37 // It will be destroyed when this actor leaves the loop, ie before the receiver gets the data
38 std::string* payload = new std::string(msg_content);
40 /* Create a communication representing the ongoing communication and then */
41 simgrid::s4u::CommPtr comm = mbox->put_async(payload, msg_size);
42 XBT_INFO("Send '%s' to '%s'", msg_content.c_str(), mbox->get_cname());
44 if (sleep_test_time > 0) { /* - "test_time" is set to 0, wait */
45 while (not comm->test()) { /* - Call test() every "sleep_test_time" otherwise */
46 simgrid::s4u::this_actor::sleep_for(sleep_test_time);
53 /* Send message to let the receiver know that it should stop */
54 XBT_INFO("Send 'finalize' to 'receiver'");
55 mbox->put(new std::string("finalize"), 0);
58 /* Receiver actor expects 1 argument: its ID */
59 static void receiver(int, char**)
61 double sleep_start_time = 1.0;
62 double sleep_test_time = 0.1;
64 simgrid::s4u::Mailbox* mbox = simgrid::s4u::Mailbox::by_name("receiver");
66 XBT_INFO("sleep_start_time : %f , sleep_test_time : %f", sleep_start_time, sleep_test_time);
67 simgrid::s4u::this_actor::sleep_for(sleep_start_time);
69 XBT_INFO("Wait for my first message");
70 for (bool cont = true; cont;) {
72 simgrid::s4u::CommPtr comm = mbox->get_async(&payload);
74 if (sleep_test_time > 0) { /* - "test_time" is set to 0, wait */
75 while (not comm->test()) { /* - Call test() every "sleep_test_time" otherwise */
76 simgrid::s4u::this_actor::sleep_for(sleep_test_time);
82 const std::string* received = static_cast<std::string*>(payload);
83 XBT_INFO("I got a '%s'.", received->c_str());
84 if (*received == "finalize")
85 cont = false; // If it's a finalize message, we're done.
90 int main(int argc, char *argv[])
92 xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]);
94 simgrid::s4u::Engine e(&argc, argv);
95 e.register_function("sender", &sender);
96 e.register_function("receiver", &receiver);
98 e.load_platform(argv[1]);
99 e.load_deployment(argv[2]);