/* 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 <functional>
-#include <mutex>
+#include <mutex> /* std::mutex and std::lock_guard */
+#include "simgrid/s4u.hpp" /* All of S4U */
-#include <xbt/sysdep.h>
-
-#include "simgrid/s4u.hpp"
-
-#define NB_ACTOR 2
+#define NB_ACTOR 6
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "a sample log category");
+/* This worker uses a classical mutex */
static void worker(simgrid::s4u::MutexPtr mutex, int& result)
{
- // Do the calculation
- simgrid::s4u::this_actor::execute(1000);
-
// lock the mutex before enter in the critical section
- std::lock_guard<simgrid::s4u::Mutex> lock(*mutex);
- XBT_INFO("Hello s4u, I'm ready to compute");
+ mutex->lock();
+ XBT_INFO("Hello s4u, I'm ready to compute after a regular lock");
// And finaly add it to the results
result += 1;
XBT_INFO("I'm done, good bye");
+
+ // You have to unlock the mutex if you locked it manually.
+ // Beware of exceptions preventing your unlock() from being executed!
+ mutex->unlock();
}
static void workerLockGuard(simgrid::s4u::MutexPtr mutex, int& result)
{
- simgrid::s4u::this_actor::execute(1000);
-
// Simply use the std::lock_guard like this
+ // It's like a lock() that would do the unlock() automatically when getting out of scope
std::lock_guard<simgrid::s4u::Mutex> lock(*mutex);
// then you are in a safe zone
- XBT_INFO("Hello s4u, I'm ready to compute");
+ XBT_INFO("Hello s4u, I'm ready to compute after a lock_guard");
// update the results
result += 1;
XBT_INFO("I'm done, good bye");
+
+ // Nothing specific here: the unlock will be automatic
}
static void master()
