teshsuite/s4u/actor-suspend/actor-suspend.cpp

   1 /* Copyright (c) 2020. 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 // This is the MWE of https://framagit.org/simgrid/simgrid/-/issues/50
   7 // The problem was occuring when suspending an actor that will be executed later in the same scheduling round
   8
   9 #include <iostream>
  10 #include <simgrid/s4u.hpp>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <vector>
  14
  15 XBT_LOG_NEW_DEFAULT_CATEGORY(mwe, "Minimum Working Example");
  16
  17 simgrid::s4u::ActorPtr receiver;
  18
  19 class Receiver {
  20
  21 public:
  22   void operator()()
  23   {
  24     XBT_INFO("Starting.");
  25     simgrid::s4u::Mailbox* mailbox = simgrid::s4u::Mailbox::by_name("receiver");
  26     void* data                     = (void*)2;
  27     data                           = mailbox->get();
  28     xbt_die("get() has returned (even though it shouldn't!) with a %s message",
  29             (data == nullptr ? "null" : "non-null"));
  30   }
  31 };
  32
  33 class Suspender {
  34
  35 public:
  36   void operator()()
  37   {
  38
  39     // If we sleep a bit here, this MWE works because the suspender is not trying to suspend someone executed later in
  40     // the same scheduling round simgrid::s4u::this_actor::sleep_for(0.01);
  41
  42     XBT_INFO("Suspend the receiver...");
  43     receiver->suspend();
  44     XBT_INFO("Resume the receiver...");
  45     receiver->resume();
  46
  47     XBT_INFO("Sleeping 10 sec...");
  48     simgrid::s4u::this_actor::sleep_for(10);
  49     XBT_INFO("Done!");
  50   }
  51 };
  52
  53 int main(int argc, char** argv)
  54 {
  55
  56   simgrid::s4u::Engine* engine = new simgrid::s4u::Engine(&argc, argv);
  57
  58   engine->load_platform(argv[1]);
  59   simgrid::s4u::Host* host = simgrid::s4u::Host::by_name("Tremblay");
  60
  61   simgrid::s4u::Actor::create("Suspender", host, Suspender());
  62   receiver = simgrid::s4u::Actor::create("Receiver", host, Receiver());
  63
  64   engine->run();
  65
  66   return 0;
  67 }