mv examples/s4u examples/cpp

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

diff --git a/examples/cpp/app-masterworkers/s4u-app-masterworkers-fun.cpp b/examples/cpp/app-masterworkers/s4u-app-masterworkers-fun.cpp
new file mode 100644 (file)
index 0000000..0db8087
--- /dev/null
+++ b/examples/cpp/app-masterworkers/s4u-app-masterworkers-fun.cpp
@@ -0,0 +1,89 @@
+/* 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 example");
+
+// master-begin
+static void master(std::vector<std::string> args)
+{
+  xbt_assert(args.size() > 4, "The master function expects at least 3 arguments");
+
+  long tasks_count        = std::stol(args[1]);
+  double compute_cost     = std::stod(args[2]);
+  long communication_cost = std::stol(args[3]);
+  std::vector<simgrid::s4u::Mailbox*> workers;
+  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);
+
+  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 cost to that worker */
+    XBT_INFO("Sending task %d of %ld to mailbox '%s'", i, tasks_count, mailbox->get_cname());
+    mailbox->put(new double(compute_cost), communication_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);
+  }
+}
+// master-end
+
+// worker-begin
+static void worker(std::vector<std::string> args)
+{
+  xbt_assert(args.size() == 1, "The worker expects no argument");
+
+  const simgrid::s4u::Host* my_host = simgrid::s4u::this_actor::get_host();
+  simgrid::s4u::Mailbox* mailbox   = simgrid::s4u::Mailbox::by_name(my_host->get_name());
+
+  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.");
+}
+// worker-end
+
+// main-begin
+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 functions representing the actors */
+  e.register_function("master", &master);
+  e.register_function("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;
+}
+// main-end