mv examples/s4u examples/cpp

[simgrid.git] / examples / cpp / app-masterworkers / s4u-app-masterworkers-class.cpp

diff --git a/examples/cpp/app-masterworkers/s4u-app-masterworkers-class.cpp b/examples/cpp/app-masterworkers/s4u-app-masterworkers-class.cpp
new file mode 100644 (file)
index 0000000..d907daa
--- /dev/null
+++ b/examples/cpp/app-masterworkers/s4u-app-masterworkers-class.cpp
@@ -0,0 +1,100 @@
+/* Copyright (c) 2010-2021. 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. */
+
+/* ************************************************************************* */
+/* Take this tutorial online: https://simgrid.frama.io/simgrid/tuto_s4u.html */
+/* ************************************************************************* */
+
+#include <simgrid/s4u.hpp>
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_app_masterworker, "Messages specific for this s4u example");
+
+class Master {
+  long tasks_count      = 0;
+  double compute_cost   = 0;
+  long communicate_cost = 0;
+  std::vector<simgrid::s4u::Mailbox*> workers;
+
+public:
+  explicit Master(std::vector<std::string> args)
+  {
+    xbt_assert(args.size() > 4, "The master function expects 3 arguments plus the workers' names");
+
+    tasks_count      = std::stol(args[1]);
+    compute_cost     = std::stod(args[2]);
+    communicate_cost = std::stol(args[3]);
+    for (unsigned int i = 4; i < args.size(); i++)
+      workers.push_back(simgrid::s4u::Mailbox::by_name(args[i]));
+
+    XBT_INFO("Got %zu workers and %ld tasks to process", workers.size(), tasks_count);
+  }
+
+  void operator()()
+  {
+    for (int i = 0; i < tasks_count; i++) { /* For each task to be executed: */
+      /* - Select a worker in a round-robin way */
+      simgrid::s4u::Mailbox* mailbox = workers[i % workers.size()];
+
+      /* - Send the computation amount to the worker */
+      if (tasks_count < 10000 || (tasks_count < 100000 && i % 10000 == 0) || i % 100000 == 0)
+        XBT_INFO("Sending task %d of %ld to mailbox '%s'", i, tasks_count, mailbox->get_cname());
+      mailbox->put(new double(compute_cost), communicate_cost);
+    }
+
+    XBT_INFO("All tasks have been dispatched. Request all workers to stop.");
+    for (unsigned int i = 0; i < workers.size(); i++) {
+      /* The workers stop when receiving a negative compute_cost */
+      simgrid::s4u::Mailbox* mailbox = workers[i % workers.size()];
+      mailbox->put(new double(-1.0), 0);
+    }
+  }
+};
+
+class Worker {
+  simgrid::s4u::Mailbox* mailbox = nullptr;
+
+public:
+  explicit Worker(std::vector<std::string> args)
+  {
+    xbt_assert(args.size() == 1, "The worker expects to not get any argument");
+
+    mailbox = simgrid::s4u::Mailbox::by_name(simgrid::s4u::this_actor::get_host()->get_name());
+  }
+
+  void operator()()
+  {
+    double compute_cost;
+    do {
+      auto msg     = mailbox->get_unique<double>();
+      compute_cost = *msg;
+
+      if (compute_cost > 0) /* If compute_cost is valid, execute a computation of that cost */
+        simgrid::s4u::this_actor::execute(compute_cost);
+    } while (compute_cost > 0); /* Stop when receiving an invalid compute_cost */
+
+    XBT_INFO("Exiting now.");
+  }
+};
+
+int main(int argc, char* argv[])
+{
+  simgrid::s4u::Engine e(&argc, argv);
+  xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]);
+
+  /* Register the classes representing the actors */
+  e.register_actor<Master>("master");
+  e.register_actor<Worker>("worker");
+
+  /* Load the platform description and then deploy the application */
+  e.load_platform(argv[1]);
+  e.load_deployment(argv[2]);
+
+  /* Run the simulation */
+  e.run();
+
+  XBT_INFO("Simulation is over");
+
+  return 0;
+}