X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/649bd7b5c26e344eee9bd9a70625e644d302ba3d..2b96915b15f55baecfd7df7993fe0920a4ed8413:/examples/s4u/async-wait/s4u-async-wait.cpp diff --git a/examples/s4u/async-wait/s4u-async-wait.cpp b/examples/s4u/async-wait/s4u-async-wait.cpp index 86dd403676..95b883d059 100644 --- a/examples/s4u/async-wait/s4u-async-wait.cpp +++ b/examples/s4u/async-wait/s4u-async-wait.cpp @@ -1,114 +1,103 @@ -/* Copyright (c) 2010-2017. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2010-2020. 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" - #include "xbt/str.h" - #include - #include - -XBT_LOG_NEW_DEFAULT_CATEGORY(msg_async_wait, "Messages specific for this s4u example"); - -/* Main function of the Sender process */ -class sender { - long messages_count; - long receivers_count; - double sleep_start_time; /* - start time */ - double sleep_test_time; /* - test time */ - double msg_size; - simgrid::s4u::MailboxPtr mbox; - -public: - explicit sender(std::vector args) +/* This example shows how to use simgrid::s4u::this_actor::wait() to wait for a given communication. + * + * As for the other asynchronous examples, the sender initiate all the messages it wants to send and + * pack the resulting simgrid::s4u::CommPtr objects in a vector. All messages thus occurs concurrently. + * + * The sender then loops until there is no ongoing communication. + */ + +#include "simgrid/s4u.hpp" +#include +#include +#include + +XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_async_wait, "Messages specific for this s4u example"); + +static void sender(int argc, char** argv) { - xbt_assert(args.size() == 7, "The sender function expects 6 arguments from the XML deployment file"); - messages_count = std::stol(args[1]); /* - number of tasks */ - msg_size = std::stod(args[2]); /* - computational cost */ - double task_comm_size = std::stod(args[3]); /* - communication cost */ - receivers_count = std::stol(args[4]); /* - number of receivers */ - double sleep_start_time = std::stod(args[5]); /* - start time */ - double sleep_test_time = std::stod(args[6]); /* - test time */ + xbt_assert(argc == 3, "Expecting 2 parameters from the XML deployment file but got %d", argc); + long messages_count = std::stol(argv[1]); /* - number of tasks */ + double msg_size = std::stod(argv[2]); /* - communication cost in bytes */ + double sleep_start_time = 5.0; + double sleep_test_time = 0; + + simgrid::s4u::Mailbox* mbox = simgrid::s4u::Mailbox::by_name("receiver"); + XBT_INFO("sleep_start_time : %f , sleep_test_time : %f", sleep_start_time, sleep_test_time); -} -void operator()() -{ + simgrid::s4u::this_actor::sleep_for(sleep_start_time); + for (int i = 0; i < messages_count; i++) { - char mailbox[80]; - char taskname[80]; - - std::string mbox_name = std::string("receiver-") + std::to_string(i % receivers_count); - mbox = simgrid::s4u::Mailbox::byName(mbox_name); - snprintf(mailbox,79, "receiver-%ld", i % receivers_count); - snprintf(taskname,79, "Task_%d", i); - - /* Create a communication */ - simgrid::s4u::CommPtr comm = mbox->put_async((void*)mailbox, msg_size); - XBT_INFO("Send to receiver-%ld Task_%d", i % receivers_count, i); - } - - for (int i = 0; i < receivers_count; i++) { - char mailbox[80]; - char* payload = xbt_strdup("finalize"); - snprintf(mailbox, 79, "receiver-%d", i); - simgrid::s4u::CommPtr comm = mbox->put_async((void*)payload, 0); - XBT_INFO("Send to receiver-%d finalize", i); - } + std::string msg_content = std::string("Message ") + std::to_string(i); + // Copy the data we send: the 'msg_content' variable is not a stable storage location. + // It will be destroyed when this actor leaves the loop, ie before the receiver gets the data + std::string* payload = new std::string(msg_content); - XBT_INFO("Goodbye now!"); + /* Create a communication representing the ongoing communication and then */ + simgrid::s4u::CommPtr comm = mbox->put_async(payload, msg_size); + XBT_INFO("Send '%s' to '%s'", msg_content.c_str(), mbox->get_cname()); -} -}; - -/* Receiver process expects 3 arguments: */ -class receiver { - int id; - double sleep_test_time; - double sleep_start_time; - simgrid::s4u::MailboxPtr mbox; - -public: - explicit receiver(std::vector args) - { - xbt_assert(args.size() == 4, "The relay_runner function does not accept any parameter from the XML deployment file"); - id = std::stoi(args[1]); /* - unique id */ - sleep_start_time = std::stod(args[2]); /* - start time */ - sleep_test_time = std::stod(args[3]); /* - test time */ - XBT_INFO("sleep_start_time : %f , sleep_test_time : %f", sleep_start_time, sleep_test_time); - std::string mbox_name = std::string("receiver-") + std::to_string(id); - mbox = simgrid::s4u::Mailbox::byName(mbox_name); + if (sleep_test_time > 0) { /* - "test_time" is set to 0, wait */ + while (not comm->test()) { /* - Call test() every "sleep_test_time" otherwise */ + simgrid::s4u::this_actor::sleep_for(sleep_test_time); + } + } else { + comm->wait(); + } + } + + /* Send message to let the receiver know that it should stop */ + XBT_INFO("Send 'finalize' to 'receiver'"); + mbox->put(new std::string("finalize"), 0); } -void operator()() +/* Receiver actor expects 1 argument: its ID */ +static void receiver(XBT_ATTRIB_UNUSED int argc, XBT_ATTRIB_UNUSED char** argv) { - char mailbox[80]; - snprintf(mailbox,79, "receiver-%d", id); - while (1) { - char* received = static_cast(mbox->get()); - XBT_INFO("Wait to receive a task"); - XBT_INFO("I got a '%s'.", received); - if (std::strcmp(received, "finalize") == 0) { /* If it's a finalize message, we're done */ - xbt_free(received); - break; + double sleep_start_time = 1.0; + double sleep_test_time = 0.1; + + simgrid::s4u::Mailbox* mbox = simgrid::s4u::Mailbox::by_name("receiver"); + + XBT_INFO("sleep_start_time : %f , sleep_test_time : %f", sleep_start_time, sleep_test_time); + simgrid::s4u::this_actor::sleep_for(sleep_start_time); + + XBT_INFO("Wait for my first message"); + for (bool cont = true; cont;) { + void* payload; + simgrid::s4u::CommPtr comm = mbox->get_async(&payload); + + if (sleep_test_time > 0) { /* - "test_time" is set to 0, wait */ + while (not comm->test()) { /* - Call test() every "sleep_test_time" otherwise */ + simgrid::s4u::this_actor::sleep_for(sleep_test_time); + } + } else { + comm->wait(); } - /* Otherwise receiving the message was all we were supposed to do */ - xbt_free(received); + + const std::string* received = static_cast(payload); + XBT_INFO("I got a '%s'.", received->c_str()); + if (*received == "finalize") + cont = false; // If it's a finalize message, we're done. + delete received; } } -}; int main(int argc, char *argv[]) { - simgrid::s4u::Engine* e = new simgrid::s4u::Engine(&argc, argv); - - xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]); - - e->registerFunction("sender"); - e->registerFunction("receiver"); - - e->loadPlatform(argv[1]); - e->loadDeployment(argv[2]); - e->run(); - - return 0; + xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]); + + simgrid::s4u::Engine e(&argc, argv); + e.register_function("sender", &sender); + e.register_function("receiver", &receiver); + + e.load_platform(argv[1]); + e.load_deployment(argv[2]); + e.run(); + + return 0; }