examples/cpp/activity-waitany/s4u-activity-waitany.cpp

   1 /* Copyright (c) 2010-2023. The SimGrid Team. All rights reserved.          */
   2
   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. */
   5
   6 #include "simgrid/s4u.hpp"
   7 #include <cstdlib>
   8 #include <iostream>
   9 #include <string>
  10 namespace sg4 = simgrid::s4u;
  11
  12 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_activity_waittany, "Messages specific for this s4u example");
  13
  14 static void bob()
  15 {
  16   sg4::Mailbox* mbox    = sg4::Mailbox::by_name("mbox");
  17   const sg4::Disk* disk = sg4::Host::current()->get_disks().front();
  18   std::string* payload;
  19
  20   XBT_INFO("Create my asynchronous activities");
  21   auto exec = sg4::this_actor::exec_async(5e9);
  22   auto comm = mbox->get_async(&payload);
  23   auto io   = disk->read_async(3e8);
  24
  25   std::vector<sg4::ActivityPtr> pending_activities = {boost::dynamic_pointer_cast<sg4::Activity>(exec),
  26                                                       boost::dynamic_pointer_cast<sg4::Activity>(comm),
  27                                                       boost::dynamic_pointer_cast<sg4::Activity>(io)};
  28
  29   XBT_INFO("Wait for asynchrounous activities to complete");
  30   while (not pending_activities.empty()) {
  31     ssize_t changed_pos = sg4::Activity::wait_any(pending_activities);
  32     if (changed_pos != -1) {
  33       auto* completed_one = pending_activities[changed_pos].get();
  34       if (dynamic_cast<sg4::Comm*>(completed_one))
  35         XBT_INFO("Completed a Comm");
  36       if (dynamic_cast<sg4::Exec*>(completed_one))
  37         XBT_INFO("Completed an Exec");
  38       if (dynamic_cast<sg4::Io*>(completed_one))
  39         XBT_INFO("Completed an I/O");
  40       pending_activities.erase(pending_activities.begin() + changed_pos);
  41     }
  42   }
  43   XBT_INFO("Last activity is complete");
  44   delete payload;
  45 }
  46
  47 static void alice()
  48 {
  49   auto* payload = new std::string("Message");
  50   XBT_INFO("Send '%s'", payload->c_str());
  51   sg4::Mailbox::by_name("mbox")->put(payload, 6e8);
  52 }
  53
  54 int main(int argc, char* argv[])
  55 {
  56   sg4::Engine e(&argc, argv);
  57
  58   e.load_platform(argv[1]);
  59
  60   sg4::Actor::create("bob", e.host_by_name("bob"), bob);
  61   sg4::Actor::create("alice", e.host_by_name("alice"), alice);
  62
  63   e.run();
  64
  65   return 0;
  66 }