X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/2e20b9d63d8a9ca26f8b508b5cab294acc3b608a..e48eade5ab404acd1948883302768c55be145b6a:/examples/cpp/synchro-mutex/s4u-synchro-mutex.cpp

diff --git a/examples/cpp/synchro-mutex/s4u-synchro-mutex.cpp b/examples/cpp/synchro-mutex/s4u-synchro-mutex.cpp
index 9c7d4f6754..241322650e 100644
--- a/examples/cpp/synchro-mutex/s4u-synchro-mutex.cpp
+++ b/examples/cpp/synchro-mutex/s4u-synchro-mutex.cpp
@@ -1,13 +1,13 @@
-/* Copyright (c) 2006-2022. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2006-2023. 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" /* All of S4U */
 #include "xbt/config.hpp"
-namespace sg4 = simgrid::s4u;
+#include <mutex> /* std::mutex and std::scoped_lock */
 
-#include <mutex> /* std::mutex and std::lock_guard */
+namespace sg4 = simgrid::s4u;
 
 static simgrid::config::Flag<int> cfg_actor_count("actors", "How many pairs of actors should be started?", 6);
 
@@ -29,14 +29,14 @@ static void worker(sg4::MutexPtr mutex, int& result)
   mutex->unlock();
 }
 
-static void workerLockGuard(sg4::MutexPtr mutex, int& result)
+static void workerScopedLock(sg4::MutexPtr mutex, int& result)
 {
-  // Simply use the std::lock_guard like this
+  // Simply use the std::scoped_lock like this
   // It's like a lock() that would do the unlock() automatically when getting out of scope
-  std::lock_guard<sg4::Mutex> lock(*mutex);
+  const std::scoped_lock lock(*mutex);
 
   // then you are in a safe zone
-  XBT_INFO("Hello s4u, I'm ready to compute after a lock_guard");
+  XBT_INFO("Hello s4u, I'm ready to compute after a scoped_lock");
   // update the results
   result += 1;
   XBT_INFO("I'm done, good bye");
@@ -44,26 +44,24 @@ static void workerLockGuard(sg4::MutexPtr mutex, int& result)
   // Nothing specific here: the unlock will be automatic
 }
 
-static void master()
+int main(int argc, char** argv)
 {
-  int result = 0;
+  sg4::Engine e(&argc, argv);
+  e.load_platform(argc > 1 ? argv[1] : "../../platforms/two_hosts.xml");
+
+  /* Create the requested amount of actors pairs. Each pair has a specific mutex and cell in `result`. */
+  std::vector<int> result(cfg_actor_count.get());
 
   for (int i = 0; i < cfg_actor_count; i++) {
     sg4::MutexPtr mutex = sg4::Mutex::create();
-    sg4::Actor::create("worker", sg4::Host::by_name("Jupiter"), workerLockGuard, mutex, std::ref(result));
-    sg4::Actor::create("worker", sg4::Host::by_name("Tremblay"), worker, mutex, std::ref(result));
+    sg4::Actor::create("worker", sg4::Host::by_name("Jupiter"), workerScopedLock, mutex, std::ref(result[i]));
+    sg4::Actor::create("worker", sg4::Host::by_name("Tremblay"), worker, mutex, std::ref(result[i]));
   }
 
-  sg4::this_actor::sleep_for(10);
-  XBT_INFO("Results is -> %d", result);
-}
-
-int main(int argc, char **argv)
-{
-  sg4::Engine e(&argc, argv);
-  e.load_platform("../../platforms/two_hosts.xml");
-  sg4::Actor::create("main", e.host_by_name("Tremblay"), master);
   e.run();
 
+  for (int i = 0; i < cfg_actor_count; i++)
+    XBT_INFO("Result[%d] -> %d", i, result[i]);
+
   return 0;
 }